Nelson J. Leonard

Nelson J. Leonard's AcademicInfluence.com Rankings

Nelson J. Leonard

Chemistry

#972

World Rank

#1571

Historical Rank

Organic Chemistry

#98

World Rank

#134

Historical Rank

chemistry Degrees

Download Badge

Chemistry

Nelson J. Leonard's Degrees

PhD Chemistry University of California, Berkeley
Bachelors Chemistry Stanford University

Why Is Nelson J. Leonard Influential?

(Suggest an Edit or Addition)

(See a Problem?)

Nelson J. Leonard's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Fluorescent modification of adenosine-containing coenzymes. Biological activities and spectroscopic properties. (1972) (441)
Synthetic spectroscopic models related to coenzymes and base pairs. V. Emission properties of NADH. Studies of fluorescence lifetimes and quantum efficiencies of NADH, AcPyADH, [reduced acetylpyridineadenine dinucleotide] and simplified synthetic models (1970) (327)
Periodate Oxidation of Sulfides to Sulfoxides. Scope of the Reaction (1962) (246)
Fluorescent adenosine and cytidine derivatives. (1972) (228)
Cytokinins: Structure/activity relationships☆ (1967) (210)
Synthetic spectroscopic models related to coenzymes and base pairs. II. Evidence for intramolecular base-base interactions in dinucleotide analog. (1968) (201)
A Fluorescent Modification of Adenosine Triphosphate with Activity in Enzyme Systems: 1,N6-Ethenoadenosine Triphosphate (1972) (136)
Etheno-substituted nucleotides and coenzymes: fluorescence and biological activity. (1984) (132)
Unsaturated Amines. III. Introduction of α,β-Unsaturation by Means of Mercuric Acetate: Δ1(10)-Dehydroquinolizidine1,2 (1955) (113)
Direct Synthesis of Ternary Iminium Salts by Combination of Aldehydes or Ketones with Secondary Amine Salts1,2 (1963) (110)
Unsaturated Amines. X. The Mercuric Acetate Route to Substituted Piperidines, Δ2-Tetrahydropyridines and Δ2-Tetrahydroanabasines (1957) (107)
The Influence of Steric Configuration on the Ultraviolet Absorption of 1,2-Diketones (1950) (92)
Cytokinin from Soluble RNA of Escherichia coli: 6-(3-Methyl-2-butenylamino)-2-methylthio-9-β-D-ribofuranosylpurine (1968) (91)
A fluorescent analog of nicotinamide adenine dinucleotide. (1972) (89)
Unsaturated Amines. II. Determination of the Proximity of Nitrogen to a Double Bond by Ultraviolet Absorption Spectra1 (1954) (86)
Photoreaction of 4-thiouracil with cytosine. Relation to photoreactions in Escherichia coli transfer ribonucleic acids. (1972) (85)
Unsaturated Amines. XIII. The Sites of Alkylation and Protonation in Certain Enaminoketones. Substituted Trimethinium Compounds from O-Alkylated Enaminoketones1 (1959) (82)
Trimethylene bridges as synthetic spacers for the detection of intramolecular interactions (1979) (81)
Cytokinins: identification of compounds isolated from Corynebacterium fascians. (1966) (80)
Synthesis and structure of tri-s-triazine (1982) (80)
Isolation and identification of four cytokinins from wheat germ transfer ribonucleic acid. (1970) (79)
Studies of tautomers and protonation of adenine and its derivatives by nitrogen-15 nuclear magnetic resonance spectroscopy (1983) (79)
1,N2-ethenoguanine and N2,3-ethenoguanine. Synthesis and comparison of the electronic spectral properties of these linear and angular triheterocycles related to the Y bases. (1977) (79)
Purine Nucleosides. VIII. Reinvestigation of the Position of Glycosidation in Certain Synthetic “7”-Substituted 6-Dimethylaminopurine Nucleosides Related to Puromycin (1964) (76)
Defined dimensional changes in enzyme substrates and cofactors. Synthesis of lin-benzoadenosine and enzymatic evaluation of derivatives of the benzopurines. (1976) (74)
The Chemistry of Triacanthine (1962) (71)
Synthesis of modified nucleoside 3',5'-bisphosphates and their incorporation into oligoribonucleotides with T4 RNA ligase. (1978) (70)
The Synthesis of 3-β-D-Ribofuranosyladenine (1963) (70)
Dimensional probes of enzyme-coenzyme binding sites (1982) (70)
Reaction of diethyl pyrocarbonate with nucleic acid components. Adenosine. (1971) (70)
5-Amino-5-deoxyribose derivatives. Synthesis and use in the preparation of “Reversed” Nucleosides (1966) (70)
Chloroacetaldehyde-modified dinucleoside phosphates. Dynamic fluorescence quenching and quenching due to intramolecular complexation. (1974) (69)
Purification and characterization of the purE, purK, and purC gene products: identification of a previously unrecognized energy requirement in the purine biosynthetic pathway. (1992) (69)
Transannular Interaction between Sulfide and Ketone Groups1 (1960) (69)
Adenosine cyclic 3',5'-monophosphate dependent protein kinase: a new fluorescence displacement titration technique for characterizing the nucleotide binding site on the catalytic subunit. (1983) (69)
Synthesis of 3--D-Ribofuranosyladenine and (3--D-Ribofuranosyladenine)-5'-phosphate (1965) (69)
Characterization of Nx,Ny‐Disubstituted adenines by ultraviolet absorption spectra (1965) (69)
Tri-s-triazine: synthesis, chemical behavior, and spectroscopic and theoretical probes of valence orbital structure (1984) (66)
Unsaturated Amines. IV. Structures and Reactions of the Dehydrosparteines and their Salts1—3 (1955) (65)
The synthesis of ribosyl-cis-zeatin and thin layer chromatographic separation of the cis and trans isomers of ribosylzeatin. (1971) (63)
Small charged rings. IX. Expansion of the azirine ring (1967) (62)
Stereoselective synthesis of cis-zeatin (1971) (61)
Fluorescent Modification of Adenosine 3',5'-Monophosphate: Spectroscopic Properties and Activity in Enzyme Systems (1972) (60)
The Use of Fluoro Compounds in the Determination of Valency Angles by Electric Dipole Moment Measurements (1948) (60)
Isolation of cis-Zeatin from Corynebacterium fascians Cultures. (1973) (59)
Defined dimensional changes in enzyme cofactors: fluorescent "stretched-out" analogs of adenine nucleotides. (1977) (58)
The Ultraviolet Absorption Spectra of Hindered Benzils (1950) (57)
Cytokinins: synthesis, mass spectra, and biological activity of compounds related to zeatin. (1969) (57)
The isolation and identification of two cytokinins from Escherichia coli transfer ribonucleic acids. (1969) (57)
Unsaturated Amines. XVI. An Oxidative Cyclization Route to Oxazolidines and Tetrahydro-1,3-oxazines1,2 (1960) (57)
Flavin 1, N 6 -ethenoadenine dinucleotide: dynamic and static quenching of fluorescence. (1973) (56)
Reaction of diethyl pyrocarbonate with nucleic acid components. Bases and nucleosides derived from guanine, cytosine, and uracil. (1973) (51)
Isolation and identification of cytokinins located in the transfer ribonucleic acid of tobacco callus grown in the presence of 6-benzylaminopurine. (1971) (49)
Dimensional probes of the enzyme binding sites of adenine nucleotides. Biological effects of widening the adenine ring by 2.4 A. (1978) (47)
Comparison of cytokinin activities of naturally occurring ribonucleosides and corresponding bases (1972) (47)
Synthesis of 3-(2'-deoxy-D-erythro-pentofuranosyl)adenine. Application of a new protecting group, pivaloyloxymethyl(Pom) (1967) (46)
Synthetic spectroscopic models. Intramolecular stacking interactions between indole and connected nucleic acid bases. Hypochromism and fluorescence. (1975) (46)
Transannular Sulfoxide-Ketone Reactions and Oxygen Transfer (1962) (45)
Cytokinins: Synthesis and growth-promoting activity of 2-substituted compounds in the N6-isopentenyladenine and zeatin series (1970) (45)
SYNTHETIC SPECTROSCOPIC MODELS RELATED TO COENZYMES AND BASE PAIRS. III. A 1,1'-TRIMETHYLENE-LINKED THYMINE PHOTODIMER OF CIS-SYN STRUCTURE. (1969) (45)
The Synthesis of 7-Substituted Adenines through the Use of a Blocking Group at the 3-Position. Site of Alkylation of 7-Substituted Adenines (1963) (45)
Photoemission properties of methyl-substituted guanines: photoelectron and fluorescence investigations of 1,9-dimethylguanine, O6,9-dimethylguanine, and 9-methylguanine (1990) (45)
Solid state ultraviolet irradiation of 1,1'-trimethylenebisthymine and photosensitized irradiation of 1,1'-polymethylenebisthymines. (1973) (45)
Unsaturated Amines. XI. The Course of Formic Acid Reduction of Enamines1 (1957) (45)
Spectral Properties of Medium- and Large-ring Carbocyclic Compounds: α-Bromoketones, Enol Acetates and Unsaturated Ketones (1958) (44)
Synthesis of 2-methylthio-cis- and trans-ribosylzeatin and their isolation from Pisum tRNA (1974) (44)
FLUORESCENT NUCLEOSIDES AND NUCLEOTIDES * (1975) (44)
Unsaturated Amines. XII. Steric Requirements of Mercuric Acetate Oxidation of Tertiary Amines1 (1958) (43)
Cytokinin of Wheat Germ Transfer RNA: 6-(4-Hydroxy- 3-methyl-2-butenylamino)-2-methylthio-9-β-D-ribofuranosylpurine (1969) (43)
Attachment of a fluorescent label to 4-thiouracil and 4-thiouridine. (1971) (43)
Synthesis and Properties of Analogs of Adenosine Diphosphate, Adenosine Triphosphate, and Nicotinamide-Adenine Dinucleotide Derived from 3-β-D-Ribofuranosyladenine (3-Isoadenosine)* (1965) (43)
Hormonal control of meiosis: specificity of the 1-methyladenine receptors in starfish oocytes. (1976) (42)
Species responsible for the fluorescence of 1:N6-ethenoadenosine. (1974) (42)
Cinnolines; synthesis of aminoacetophenones and aminopropiophenones. (1946) (41)
The Total Synthesis of Sparteine and an Isosparteine by Reductive Cyclization1 (1950) (41)
Reactions of Nitroparaffins with Pseudo Bases Related to Dihydroisoquinolinium Hydroxide (1949) (40)
Dynamic and static quenching of 1,N6-ethenoadenine fluorescence in nicotinamide 1,N6-ethenoadenine dinucleotide and in 1,N6-etheno-9-(3-(indol-3-yl) propyl) adenine. (1975) (40)
THE SYNTHESIS OF COMPOUNDS POSSESSING KINETIN ACTIVITY. THE USE OF A BLOCKING GROUP AT THE 9-POSITION OF ADENINE FOR THE SYNTHESIS OF 1-SUBSTITUTED ADENINES. (1964) (39)
Infrared Absorption Spectra of Steroids. (1954) (39)
Unsaturated Amines. V. The Attack of Ternary Iminium Compounds by Nucleophilic Reagents1,2 (1956) (38)
CYTOKININS: SYNTHESIS OF 6-(3-METHYL-3-BUTENYLAMINO)-9-beta-D-RIBOFURANOSYLPURINE (3IPA), AND THE EFFECT OF SIDE-CHAIN UNSATURATION ON THE BIOLOGICAL ACTIVITY OF ISOPENTYLAMINOPURINES AND THEIR RIBOSIDES. (1968) (38)
Electric Moments and Transannular Nitrogen-Carbonyl Interaction in Cyclic Aminoketones1 (1957) (37)
Stereochemically controlled photoreactions between two thymine rings. (1974) (36)
Dimensional probes of binding and activity (1986) (36)
Unsaturated Amines. VIII. Dehydrogenation and Hydroxylation of 1-Methyldecahydroquinoline by Means of Mercuric Acetate1 (1956) (36)
Unsaturated Amines. XIV. The Mercuric Acetate Oxidation of Substituted Pyrrolidines1 (1959) (36)
Reaction of diethyl pyrocarbonate with nucleic acid components. I. Adenine. (1970) (35)
Reaction of diethyl pyrocarbonate with nucleic acid components. Adenosine-containing nucleotides and dinucleoside phosphates. (1973) (35)
ABBREVIATIONS FOR PYRIMIDINE PHOTOPRODUCTS (1974) (35)
Cytokinins: Synthesis and biological activity of ureidopurines (1971) (35)
Purine ring rearrangements leading to the development of cytokinin activity. Mechanism of the rearrangement of 3-benzyladenine to N6-benzyladenine. (1975) (35)
Cyclic Aminoacyloins and Aminoketones. IV. Dependence of Transannular Interaction Upon the Relative Location of N and CCO1 (1955) (35)
Development of cytokinin activity by rearrangement of 1-substituted adenines to 6-substituted aminopurines: inactivation by N6, 1-cyclization. (1966) (35)
Small Charged Heterocycles (1969) (34)
Cytokinins with different connecting links between purine and isopentenyl or benzyl groups (1975) (34)
Cytokinins: development of a potent antagonist. (1971) (34)
Studies on the Mechanism of the von Braun Reaction (1949) (34)
Structure of the borohydride reduction product of photolinked 4-thiouracil and cytosine. Fluorescent probe of transfer ribonucleic acid tertiary structure. (1972) (34)
The synthesis and stereochemistry of substituted 1,4-thiazepines related to the penicillins. (1966) (33)
Sulfonate Salts of Substituted Benzimidazoles1 (1947) (33)
Species responsible for the fluorescence of 3,N4-ethenocytidine. (1976) (33)
Bicyclo[3.3.3.]undecane and 1-azabicyclo[3.3.3]undecane. Geometry, strain, and spectroscopic behavior of these systems (1972) (33)
Synthesis of the "minor nucleotide" N6-(gamma, gamma-dimethylallyl)adenosine 5'-phosphate and relative rates of rearrangement of 1-to N6-dimethylallyl compounds for base, nucleoside, and nucleotide. (1967) (33)
Transannular Nitrogen-Carbonyl Interaction in Cyclic Aminoketones and Optical Rotatory Dispersion1,2 (1958) (32)
The Synthesis of 2,7-Disubstituted Tropones via Aromatization (1957) (32)
A Study of Oxazolidine Ring Isomerization in Models of the Diterpenoid Alkaloids1 (1958) (32)
Photoproducts from 4-thiouracil and cytosine and from 4-thiouridine and cytidine: refinement of tertiary tRNA structure. (1971) (32)
Synthetic spectroscopic models realted to coenzymes and base pairs. VI. Synthesis of (.omega.- aralkyl)-6,7-dimethylisoalloxazines, spectroscopic model compounds related to FAD (1969) (32)
Azido auxins: quantitative binding data in maize. (1984) (31)
The Ultraviolet Absorption Spectra of Alkoxy- and Hydroxybenzils (1949) (31)
Small Charged Rings. II. The Synthesis of Aziridinium Salts1-3 (1962) (31)
The Infrared Absorption Spectra of Cyclic β-Ketoesters (1952) (31)
Azido auxins: synthesis and biological activity of fluorescent photoaffinity labeling agents. (1981) (31)
Transannular route for stereospecific synthesis. (+-)-Isoretronecanol (1969) (30)
Mass spectra of nucleoside components of tRNA. (1969) (30)
Cytokinins: Synthesis and Biological Activity of Related Derivatives of 2iP, 3iP, and their Ribosides (1968) (30)
Synthesis and valence orbital structures of azacycl [3.3.3] azines in a systematic series (1985) (29)
Regioselective electrophilic reactions on substituted purines. Predominant intermediacy of 6- or 8-purinyl carbanions (1979) (29)
Fluorescent modification of guanine. Reaction with substituted malondialdehydes. (1976) (29)
The Synthesis of Pyrrolizidines. VI. Stereochemical Correlation of 1-Methyl- and 1-Hydroxymethylpyrrolizidine Isomers with Certain Alkaloid Products1 (1950) (28)
Rearrangement of α-Thiaketones During Clemmensen Reduction1,2 (1952) (28)
Polynucleotide analogues. VIII. Poly 3-isoadenylic acid. (1966) (28)
Small Charged Rings. III. Heterocyclic Ring Expansion through Aziridinium Salts1-3 (1963) (28)
Syntheses of all singly labeled [N]adenines: Mass spectral fragmentation of adenine. (1981) (27)
The Influence of Steric Configuration on the Ultraviolet Absorption of “Fixed” Benzils1,2 (1955) (27)
Cytokinins: Synthesis and biological activity of zeatin esters and related compounds (1971) (27)
Chemistry of the Cytokinins (1974) (27)
Stereochemistry of the anomers of methyl 2-deoxy-D-erythro-pentofuranoside. Synthesis of methyl 5-(6-aminopurin-9yl)-2,5-dideoxy-.alpha.- D-erythro-pentofuranoside, a reversed nucleoside (1968) (27)
Adenosine cyclic 3',5'-monophosphate dependent protein kinase: nucleotide binding to the chemically modified catalytic subunit. (1984) (27)
γ-Pyridones by Isomerization. Substituted 1-Methyl-3,5-dibenzyl-4-pyridones (1955) (27)
Deoxyadenosine and Thymidine Bases Held Proximal and Distal by Means of a Covalently-Linked Dimensional Analogue of dA·dT: Intramolecular vs Intermolecular Hydrogen Bonding1 (1996) (27)
1,N6-Etheno-bridged adenines and adenosines. Alkyl substitution, fluorescence properties, and synthetic applications (1980) (26)
Defined dimensional alterations in enzyme substrates. General synthetic methodology for the bent dihydro-lin-benzopurines (1986) (26)
Cyclic Aminoacyloins. III. Synthesis, Properties and the Detection of Transannular Interaction between N and CCO1,2 (1954) (26)
An analysis of five serine transfer ribonucleic acids from Drosophila. (1975) (26)
Fluorescent photoaffinity labeling: adenosine 3',5'-cyclic monophosphate receptor sites. (1978) (26)
Interactions of fluorescent analogs of adenine nucleotides with pyruvate kinase (1973) (26)
Controlled interaction between nucleic acid bases. Intramolecular stacking interactions between two adenine rings. (1973) (26)
5-(α-PHENYLETHYL)SEMIOXAMAZIDE AS A CARBONYL REAGENT (1950) (25)
The Kishner Reduction-Elimination. II. α-Substituted Pinacolones1,2 (1955) (25)
An efficient synthesis of azidoindoles and azidotryptophans (1983) (25)
Preparation of 4-mercapto and 4-amino quinazolines. (1946) (25)
Question of the ribosyl moiety in the promotion of callus growth by exogenously added cytokinins. (1971) (25)
Rearrangement of α-Aminoketones during Clemmensen Reduction. VIII. The Fate of an Eight-membered Ring1,2 (1952) (24)
Nicotinamide 3,N4-ethenocytosine dinucleotide, an analog of nicotinamide adenine dinucleotide. Synthesis and enzyme studies. (1975) (24)
Synthesis of 4-hydroxyquinolines; synthesis of 3-n-heptyl-7-methoxy-2-methyl-4-quinolinol. (1946) (24)
Azido auxins : photoaffinity labeling of auxin-binding proteins in maize coleoptile with tritiated 5-azidoindole-3-acetic Acid. (1984) (24)
Avidin-biotin interaction. Synthesis, oxidation, and spectroscopic properties of linked models (1979) (24)
Active cytokinins: photoaffinity labeling agents to detect binding. (1979) (24)
SMALL CHARGED RINGS. VII. INTERCONVERSION OF SUBSTITUTED BETA-CHLOROETHYLAMINES AND AZIRIDINIUM SALTS. (1965) (24)
1,N2-ETHENOGUANINE AND N2,3-ETHENOGUANINE. SYNTHESIS AND COMPARISON OF THE ELECTRONIC SPECTRAL PROPERTIES OF THESE LINEAR AND ANGULAR TRIHETEROCYCLES RELATED TO THE Y BASES (1978) (24)
Reductive Cyclization of Amino α-Keto Esters. A General Method for the Synthesis of Nitrogen-Heterocyclics Having Fused Five- and Six-Membered Rings (1950) (23)
Dealkylation of aromatic tertiary amines with formates (1968) (23)
The Conversion of p-Quinonemonoxime to p-Azoxyphenol (1952) (23)
Syntheses and structure assignments of six azolinone ribonucleosides (1982) (23)
Synthesis of 2'-deoxynucleosides by deoxygenation of ribonucleosides (1981) (23)
γ-Pyrones by Isomerization. Substituted 3,5-Dibenzyl-4H-pyran-4-ones (1957) (23)
The synthesis of dehydrolupanines and the stereochemistry of the C15 lupin alkaloids. (1951) (23)
The Electrolytic Reduction of Bicyclic α-Aminoketones. A New Method for the Synthesis of Medium Rings1 Containing Nitrogen2,3 (1952) (23)
Cytokinins: Influence of side-chain planarity of N6-substituted adenines and adenosines on their activity in promoting cell growth (1970) (22)
Fluorescent heterocyclic systems: syntheses, structures, and physicochemical properties of dipyrido-substituted 1,3,4,6-tetraazapentalenes (1986) (22)
1,1,1,3,3,3-Hexafluoro-2-propanol for the removal of the 4,4′-DimethoxytrityI protecting group from the 5′-hydroxyl of acid-sensitive nucleosides and nucleotides (1995) (22)
The Role of 1N-Ethenoadenosine Triphosphate and 1N-Ethenoadenosine Monophosphate in Firefly Luminescence. (1973) (22)
A NEW SYNTHESIS OF AZIRIDINIUM SALTS. 2,2-PENTAMETHYLENE-1,1-TETRAMETHYLENEAZIRIDINIUM PERCHLORATE, A PROTOTYPE1 (1960) (22)
Some Five-membered Ring α-Aminoketones (1951) (22)
Cytokinins: Synthesis of 2-, 8-, and 2,8-substituted 6-(3-methyl-2-butenylamino)purines and their relative activities in promoting cell growth (1974) (22)
Cyclic Aminoacyloins and Aminoketones. V. Detailed Infrared Spectral Study of Transannular Interaction between N and CCO1,2 (1955) (21)
Synthesis of Medium- and Large-Ring Ketones via the Dieckmann Condensation (1958) (21)
Photophysics of the S1 .tautm. SO transition in tri-s-triazine (1984) (21)
Synthesis and biochemical evaluation of 2'-deoxy-lin-benzoadenosine phosphates. (1984) (21)
Unsaturated Amines. VII. Introduction of α,β-Unsaturation by Means of Mercuric Acetate: Methylquinolizidines (1956) (21)
2,4,6-Trisubstituted pyridines. Synthesis, fluorescence, and scintillator properties (1973) (21)
The Synthesis of Substituted Tricyclo[6.2.2.02,7]dodecanes from 2-Cyclohexenone1 (1966) (21)
ALSTONIA ALKALOIDS. I. DEGRADATION OF ALSTONINE TO β-CARBOLINE BASES AND THE REDUCTION OF TETRAHYDROALSTONINE WITH SODIUM AND BUTYL ALCOHOL (1942) (21)
Synthetic spectroscopic models related to coenzymes and base pairs. IV. Stacking interactions in tRNA; the anticodon-adjacent base. (1969) (21)
"Abbreviated" dinucleosides of thymidine and deoxyuridine and their photoproducts. (1972) (20)
Cyclic Aminoacyloins and Aminoketones. VII. N-Aryl Substitution and Transannular Interaction Between N and CCO1 (1955) (20)
Nonenzymatic synthesis and properties of 5-aminoimidazole ribonucleotide (AIR). Synthesis of specifically 15N-labeled 5-aminoimidazole ribonucleoside (AIRs) derivatives (1990) (20)
Cytokinins: Isolation and identification of 6-(3-methyl-2-butenylamino)-9-β-D-ribofuranosylpurine (2iPA) from yeast cysteine tRNA (1969) (20)
Reactions of Nitroparaffins with Isoquinolinium Compounds (1949) (20)
The mode of incorporation of 6-benzylaminopurine into tobacco callus transfer ribonucleic Acid: a double labeling determination. (1974) (20)
Position of uridine thiation: the identification of minor nucleosides from transfer RNA by mass spectrometry. (1969) (20)
Mass spectra of ribonucleoside components of tRNA. II. (1970) (20)
Rearrangement of α-Aminoketones During Clemmensen Reduction. III. Contraction of a Seven-membered Ring in the Monocyclic Series (1949) (19)
Lead Tetraacetate Oxidation of Aminoalcohols (1945) (19)
The Synthesis and Oxidative Rearrangement of Some 1,4-Thiazepines Related to the Penicillins1-3 (1964) (19)
Thermolysis of substituted 1-acetoxybenzotriazoles. Carbon-to-oxygen migration of an alkyl group (1969) (19)
Intramolecular mechanism of the allylic rearrangement from O6 to C-8 in the guanine series. Double labeling experiments. (1974) (19)
SMALL CHARGED RINGS. VI. EXPANSION OF THE AZIRIDINIUM RING BY REACTION WITH NITRILES. A NEW TYPE OF BENZYLATING AGENT. (1965) (19)
THE STEREOISOMERS OF vic-DIALKYLPIPERIDINES. THE 2-n-BUTYL-3-METHYLPIPERIDINES (1953) (19)
The synthesis of pyrrolizidines. (1947) (19)
Structure of Monocrotaline. XI. Proof of the Structure of Retronecine1 (1944) (18)
Small Charged Rings. V. Expansion of the Aziridinium Ring by Reaction with Ketones1-4 (1963) (18)
Specifically deuterated and tritiated auxins (1980) (18)
Dimensional probes of the enzyme binding sites of adenine nucleotides. Interaction of lin-benzoadenosine 5'-di- and triphosphate with mitochondrial ATP synthetase, purified ATPase, and the adenine nucleotide carrier. (1978) (18)
Reactions of Quinolinium Compounds with Nitromethane (1951) (18)
The Behavior of 1,2-Diketones at the Dropping Mercury Electrode1 (1953) (18)
Convenient synthesis of linear benzopurines through a common intermediate (1987) (18)
Rearrangements of azabiphenylenes: the impact of nitrogen number and position (1985) (17)
Specificity of the 1-methyladenine receptors in starfish oocytes: synthesis and properties of some 1,8-disubstituted adenines, 1,6-dimethyl-1H-purine, and of the 1-(azidobenzyl)adenines (1984) (17)
5-Methyladenine: a transient intermediate in a translocative rearrangement (1982) (17)
Adenylates: Bound and unbound (1985) (17)
Photoaffinity-labeled Cytokinins: Synthesis and Biological Activity. (1976) (17)
The Kishner Reduction-Elimination. I. Cyclic and Open Chain α-Aminoketones1,2 (1955) (17)
3-Substituted adenines. In vitro enzyme inhibition and antiviral activity. (1979) (17)
Guanine, hypoxanthine, and xanthine analog. Synthesis of imidazo[1,5-a]-1,3,5-triazinones via rearrangement (1979) (17)
Synthesis of 4-hydroxyquinolines; a direct synthesis from beta-anilinoacrylates. (1946) (17)
Rearrangement of α-Aminoketones During Clemmensen Reduction. I. Bicyclic Compounds Containing a Bridge-head Nitrogen (1949) (17)
The Synthesis of Pyrrolizidines. II. Basicities of 8-Alkylpyrrolizidines1 (1948) (17)
Chemical modification of nucleic acid components: reactions of cytosine, cytidine, isocytosine, and adenine with methyl N-cyanomethanimidate (1981) (17)
Small Charged Rings. VIII. Isolation and Stereochemistry of Acyl Aziridinium Salt Intermediates1,2 (1965) (16)
Cyclic Aminoacyloins and Aminoketones. VI. Effect of Transannular Interaction between N and CCO on Ultraviolet Absorption1 (1955) (16)
Transannular Sulfoxide-Ketone Salt Formation across a Seven-Membered Ring1 (1963) (16)
Cytokinins. Activity and identification in Staphylococcus epidermidis transfer ribonucleic acid. (1970) (16)
Allylic rearrangement from O6 to C-8 in the guanine series. (1973) (16)
FLUORESCENT MODIFICATION OF GUANINE. REACTION WITH SUBSTITUTED MALONDIALDEHYDES (1976) (16)
CINNOLINES. II. SYNTHESIS OF 4-HYDROXYCINNOLINES1 (1946) (16)
Reductive Cyclization. A General Method for the Synthesis of 1-Azabicyclo Compounds1,2 (1950) (16)
Defined dimensional alterations in enzyme substrates. Synthesis and enzymic evaluation of some lin-naphthopurines (1982) (15)
Rearrangement of α-Aminoketones During Clemmensen Reduction. XI. The Reduction of Atom-bridged Bicyclic α-Aminoketones1,2 (1953) (15)
Nucleoside annelating agents: structures and electrophilic behavior of the products formed with N-chlorocarbonyl isocyanate (1988) (15)
Enzymic activity and .gamma.-phosphorus-32 labeling of fluorescent derivatives of cytidine triphosphate and adenosine triphosphate (1973) (15)
Small charged rings. XI. Synthesis and reactions of 1,1,2,2-tetrasubstituted azetidinium salts (1968) (15)
The angular benzoadenines. 9-Aminoimidazo[4,5-f]quinazoline and 6-aminoimidazo [4,5-h]quinazoline. (1975) (15)
Utilization of a syn to anti rearrangement for the construction of a centrosymmetric, covalently linked cross section that would direct parallel strandedness in a double-helical polynucleotide (1991) (15)
Unsaturated Amines. XV. The Mercuric Acetate Oxidation of Medium Rings Containing Tertiary Nitrogen1 (1959) (15)
Comparison of cytokinin activities of the base, ribonucleoside and 5′- and cyclic-3′,5′-monophosphate ribonucleotides of N6-isopentenyl-, N6-benzyl or 8-bromo-adenine (1975) (15)
The chemistry of cinnolines. (1945) (15)
Broadened scope of translocative rearrangements. Substituted 1,2,3-triazolo[1,5-a]-1,3,5-triazines (1985) (15)
Tropolones by Isomerization. I. 3,7-Dibenzyltropolone1 (1953) (15)
A spray reagent for adenine-containing residues: detection by fluorescence. (1972) (14)
4-(4'-diethylamino-l'-methylbutylamino)-7-chloroquinazoline. (1946) (14)
Reactions of 4-quinazolone; replacements at the 3-position. (1948) (14)
REACTIONS OF NITROPARAFFINS WITH IMINES AND PSEUDO BASES (1950) (14)
Adenosine cyclic 3',5'-monophosphate dependent protein kinase: interaction of the catalytic subunit and holoenzyme with lin-benzoadenine nucleotides. (1983) (14)
TRANSANNULAR SULFUR-CARBONYL INTERACTION (1959) (14)
Unsaturated Amines. VI. Introduction of α,β-Unsaturation by Means of Mercuric Acetate: Bicyclic Tertiary Amines1, 2 (1956) (14)
Kleine geladene Heterocyclen (1969) (14)
Biological activities of 3-isoadenosine. (1966) (14)
Photoaffinity-labeled Auxins: Synthesis and Biological Activity. (1975) (13)
Translocative rearrangements. Generality of the formamidine-induced rearrangement of 4-substituted 5-amino-4-cyano-4H-imidazoles (1983) (13)
Nucleoside annelating reagents: N-(tert-butoxycarbonyl)-2-bromoacetamide and 2-chloroketene diethyl acetal (1985) (13)
Enzymatic and chemical deamination of 3-(beta-D-ribofuranosyl)adenine. (1966) (13)
Reactions of Quinolinium Compounds with Phenylacetonitrile and Its Homologs (1952) (13)
Synthesis of covalently linked DNA/RNA cross sections (1986) (13)
The Electrolytic Reduction of α-Aminoketones1,2 (1952) (13)
Nonenzymatic synthesis of 5-aminoimidazole ribonucleoside and recognition of its facile rearrangement. (1988) (13)
DIMENSIONAL PROBING OF THE ATP BINDING SITE ON FIREFLY LUCIFERASE (1982) (13)
Synthesis and chemistry of 1,3-diazabiphenylenes (1984) (13)
SYNTHETIC SPECTROSCOPIC MODELS RELATED TO COENZYMES AND BASE PAIRS PART 12, CONTROLLED INTERACTION BETWEEN NUCLEIC ACID BASES, INTRAMOLECULAR STACKING INTERACTIONS BETWEEN TWO ADENINE RINGS (1973) (13)
The total synthesis of sparteine. (1948) (12)
Synthesis of imidazo[1,5-a]-1,3,5-triazinones by cyclization-rearrangement (1979) (12)
Synthesis and characterization of bicyclo[3.3.3]undecane and 1-azabicyclo[3.3.3]undecane (1970) (12)
Linear benzoguanine. Synthesis by two independent methods (1976) (12)
The Synthesis of Pyrrolizidines. V. 8-Hydroxymethylpyrrolizidine and 8-Chloromethylpyrrolizidine (1949) (12)
A synthesis of 3-isothiazolones (1964) (12)
Dissymmetry of certain substituted dipyridotetraazapentalenes (1987) (12)
The Electrolytic Reduction of Tricyclic α-Aminoketones. Synthesis of Medium Rings Containing Nitrogen. III (1954) (12)
Notes - Unsaturated Amines. IX. Through Bis-enamines to Aromatics (1956) (12)
Small charged rings. XIV. Dimer formation through 2‐arylaziridinium salts (1971) (12)
Chemical modification of nucleic acid components: conversion of guanosine by methyl N-cyanomethanimidate to a tricyclic, fluorescent analog of adenosine (1984) (12)
The Synthesis of Pyrrolizidines. III. Condensation of Nitromethane with Ethyl Crotonate and Subsequent Formation of 1-Methylpyrrolizidine (Heliotridane, Pseudoheliotridane) (1949) (12)
Rearrangement of α-Aminoketones during Clemmensen Reduction. V. Influence of Alkyl Substitution on the α-Carbon1,2,3 (1950) (12)
Synthesis of imidazo[4,5-h]-1,3-diazabiphenylene (lin-benzocyclobutadienopurine), a ring system having a benzocyclobutadieno spacer between the terminal rings of purine (1985) (12)
PHOTOPRODUCTS OF THYMINE AND URACIL. SYNTHESES OF THE FOUR BIPYRIMIDINE COMBINATIONS (1978) (12)
Inhibition of adenylate kinase by P1-(lin-benzo-5'-adenosyl)-P4-(5'-adenosyl) tetraphosphate and P1-(lin-benzo-5'-adenosyl)-P5-(5'-adenosyl pentaphosphate. (1979) (12)
Reactions of Quinolinium Compounds with Malononitrile and Ethyl Cyanoacetate (1952) (12)
[Identity of triacanthine, togholamine and chidlovine]. (1962) (11)
Cyclic Aminoacyloins and Aminoketones. VIII. N-Cyclopropyl Compounds and Electronic Limitation of Transannular Interaction Between N and CCO1 (1955) (11)
A Resolvable octaheterohelicene based on the 1,3,4,6-tetraazapentalene ring system (1990) (11)
Site of N-amination of adenine and alkyladenines. (1974) (11)
Synthesis of the 335-nm photoproduct of cytosine and 4-thiouracil. (1972) (11)
Di-2-picolylmethane (1950) (11)
Synthesis of 2',3'-dideoxy-3-isoadenosine : a new structural analogue of the anti-HIV active compound, 2,3'-dideoxyadenosine (1991) (11)
Synthetic peptide analogues differentially alter the binding affinities of cyclic nucleotide dependent protein kinases for nucleotide substrates. (1988) (11)
Small charged rings. XV. Kinetics and stereochemistry of the ring expansion reaction of 2-arylaziridinium salts with benzaldehyde (1971) (11)
Fluorescent cytokinins: Stretched-out analogs of N6-benzyladenine and N6-(Δ2-isopentenyl) adenine (1976) (11)
Synthesis of covalently linked double-helical cross sections representative of purine-pyrimidine, purine-purine, and pyrimidine-pyrimidine duplexes (1990) (11)
Cytokinin activity in tRNAPhe (1970) (11)
A general and convenient synthesis of 7-alkyladenines from adenine by regioselective alkylation utilizing blocking/deblocking at the 3-position. (1986) (11)
Reductive Cyclization. A Method for the Synthesis of Tricyclic Compounds Possessing a Bridgehead Nitrogen1 (1952) (11)
Foreshortened nucleotide analogs as potential base-pairing complements for lin-benzoadenosine (1982) (11)
Defined dimensional alterations in enzyme substrates: lin-naphthoadenine and lin-naphthoadenosine (1984) (11)
Some novel reactions of 4-quinazolone. (1946) (11)
Unequivocal assignment of the skeletal structure of the guanine-glyoxal adduct (1980) (10)
Synthesis of pyrrolo[3,4-d]imidazoles. A new fluorescent heterocyclic system (1985) (10)
SYNTHESIS OF LIN-BENZOALLOPURINOL (1979) (10)
Eight-Membered Ring Heterocycles from Primary Amines, Hydrogen Sulfide, and Formaldehyde1 (1962) (10)
Pyrimidinone ring opening and reclosure on a 1,3,4,6-tetraazapentalene system: syn to anti isomerization (1989) (10)
Rearrangement of α-Aminoketones during Clemmensen Reduction. X. Influence of Phenyl Substitution1 (1953) (10)
Cyclic Aminoacyloins. II. F-Strain Limitation of Transannular Interaction between N and CCO (1954) (9)
Spectroscopic models related to coenzymes and base pairs. I. The basis for hypochromism in the ultraviolet spectra of model systems related to nicotinamide--adenine dinucleotide. (1967) (9)
Structure of 3-isoadenosine. (1988) (9)
Specific and fluorescent modifications of cytidine. (1973) (9)
Spectroscopic sensitivity of linear-benzoadenine nucleotides to divalent metal counterions, side chain conformations, micelles, and enzymes. (1978) (9)
Annelation of isocytosines by reaction with methyl N-cyanomethanimidate and sodium methoxide: influence of substitution on the course of the reaction and rearrangements (1985) (9)
lin-benzoadenine nucleotides. Inter- and intramolecular interactions in aqueous solutions as observed by proton magnetic resonance (1979) (9)
Synthesis and biological activity of a profluorescent analogue of coenzyme B12. (1982) (9)
Guanine analogs. Allyl-substituted aminoimidazo[1,5-a]-1,3,5-triazinones formed by cyclization-rearrangement (1981) (9)
Allylic rearrangement from O6 to N-3 and N-7 of guanine blocked at C-8. (1976) (9)
Simple Convenient Synthesis of 1-Methylcytosine (1981) (9)
Reductive Cyclization. A Route to 6-Methyl-1-azabicyclo [5.3.0] decane from Methyl Sorbate1 (1952) (9)
2'-Deoxy-3-isoadenosine Forms Hoogsteen-Type Base Pairs with Thymidine in the d(CG[iA]TCG)_2 Duplex^1 (1996) (9)
Synthetic spectroscopic models related to coenzymes and base pairs. An "abbreviated" nicotinamide adenine dinucleotide. (1972) (9)
THE STRUCTURE OF TRIACANTHINE1 (1960) (8)
The Synthesis of Pyrrolizidines. IV. Condensation of Nitroparaffins with Methyl Methacrylate and Subsequent Formation of 2-, 6- and 8-Alkyl-Substituted Pyrrolizidines (1949) (8)
Synthetic spectroscopic models related to coenzymes and base pairs. VII. Stacking interactions in tRNA; the "bend" at dimethylguanosine. (1970) (8)
Synthesis of 4-hydroxyquinolines; preparation through 3-cyano and 3-carbanilido derivatives. (1946) (8)
Template-directed oligomerization of 3-isoadenosine 5′-phosphate (2005) (8)
Synthesis and transilience of a 1,3-diazabiphenylene (1983) (8)
A masked [π8 + π2] cycloaddition reaction involving the 1,3,4,6-tetraazapentalene ring system (1986) (8)
Reaction of an zirine with anilinium perchlorate. Method of obtaining .alpha.-ammonium anils (1968) (8)
Annelation of guanosine by reaction with methyl N-cyanomethanimidate and sodium methoxide to give a tricyclic, fluorescent analog of adenosine (1985) (8)
LABORATORY REALIZATION OF THE ROBINSON-SCHOPF SCHEME OF ALKALOID SYNTHESIS. THE PYRROLIZIDINE ALKALOIDS1 (1960) (8)
Synthesis of 2-Hydroxymethylquinolizidine (dl-2-Lupinine)* (1957) (8)
Synthetic spectroscopic models related to coenzymes and base pairs. Quaternized bisnicotinamides. (1972) (8)
Synthesis of fluorescent nucleotide analogues: 5'-mono-, di-, and triphosphates of linear-benzoguanosine, linear-benzoinosine, and linear-benzoxanthosine. (1979) (8)
The ‘chemistry’ of research collaboration (1997) (7)
Defined dimensional alterations in enzyme substrates. Birch reduction of lin-benzopurines. A contribution to information concerning the binding sites of adenosine deaminase and xanthine oxidase (1988) (7)
Structure of “Oxyprotopine” and Related Alkaloid Products (1957) (7)
Access to the 1,3,4,6-tetraazapentalene ring system (1985) (7)
Allosteric activation of aspartate transcarbamylase with a fluorescent nucleotide analogue: linear-benzo-ATP. (1978) (7)
Interaction of guanosine cyclic 3',5'-phosphate dependent protein kinase with lin-benzoadenine nucleotides. (1985) (7)
beta, gamma-Peroxy analogs of adenosine and guanosine triphosphate: synthesis and biological activity. (1982) (7)
Azido auxins : photolysis in solution and covalent binding to soybean. (1984) (7)
Directive Influence of the Acetylamino Group in the Friedel--Crafts Acylation of the Acetylaminonaphthalenes (1949) (7)
The Synthesis of Pyrrolizidines. VII. Use of the Pyrrole Mannich Base (1950) (7)
Synthesis of prox benzo iso allopurinol (1980) (6)
Methodology for the Synthesis of Dinucleoside Monophosphates Containing A 2′-Deoxy-3-Isoadenosine Unit: 3-iso-dApT and Tp(3-iso-dA) (1996) (6)
The Addition of Nitroparaffins to Diethyl Glutaconate and Diethyl Itaconate (1949) (6)
Facile carbon-sulfur bond cleavage leading to an enethiolate. Formation of a dipeptide containing dehydrocysteine and dehydrovaline. (1967) (6)
1,5-Dibromo-3-methylpentane (1946) (6)
Nitrogen-15-carbon-13 coupling for determination of the site of N-alkylation of nitrogen heterocycles. linear-Benzopurines (1976) (6)
Comparison of the hypotensive activities of highly hindered open-chain amines and their cyclic counterparts. (1966) (6)
Crystal structure and spectroscopic properties of the 1-azabicyclo[3.3.3]undecane system (1971) (6)
Some 4-amino-7-chloroquinoline derivatives. (1946) (6)
New Compounds. 6-Bromo-1,2,3,4-tetrahydroquinaldine Hydrobromide (1946) (6)
Unsaturated Amines. XVII. Preparation of Enamines by a Reductive Process1-3 (1962) (6)
Alternative routes for the genesis of kinetin: A synthetic intramolecular route from 2′-deoxyadenosine to kinetin (1976) (6)
Structure of 3,4-bis(trimethylsilyl)bicyclo[4.2.0]octa-1,3,5-triene (1981) (5)
EXAMPLES OF THE USE OF FLUORESCENT HETEROCYCLES IN CHEMISTRY AND BIOLOGY (1976) (5)
Rearrangement of α-Aminoketones during Clemmensen Reduction. VII. The Rearrangement of 3-Keto-1-azabicyclo [5.4.0]hendecane1 (1951) (5)
Assignment of the nitrogen-15 nuclear magnetic resonances of biotin and unequivocal synthesis of (+)-[1-15N]biotin (1981) (5)
Sulfonate salts of substituted benzimidazoles. (1947) (5)
Laboratory realization of the Schőpf-Oechler scheme of vasicine synthesis (1960) (5)
Nucleoside 5'-(beta, gamma-peroxytriphosphates). (1984) (5)
Synthesis of lin-benzoinosine, lin-benzoxanthosine, and lin-benzoguanosine (1979) (5)
THE PAPILIONACEOUS ALKALOIDS: XI. IDENTITY OF GENISTEINE WITH l-α-ISOSPARTEINE (1951) (5)
PURINE RING REARRANGEMENTS LEADING TO THE DEVELOPMENT OF CYTOKININ ACTIVITY, MECHANISM OF THE REARRANGEMENT OF 3-BENZYLADENINE TO N(6)-BENZYLADENINE (1975) (5)
DEFINED DIMENSIONAL ALTERATIONS IN ENZYME SUBSTRATES. LIN-NAPHTHOADENINE AND LIN-NAPHTHOADENOSINE (1984) (5)
Purines. XXVIII Preparation of some 3,7-dialkyladenines from 3-alkyladenines by alkylation : A subordinate formation of 3,9-dialkyladenines. (1986) (5)
Synthesis of 3-(3-deoxy-.beta.-D-erythro-pentofuranosyl)adenine, an isomer of cordycepin (1968) (5)
Cyclization of N6-substituted adenines to produce compounds of the pentaaza steroid type (1969) (5)
Rearrangement of α-Aminoketones during Clemmensen Reduction. VI. The Rearrangement of 3-Ketoquinolizidine (1950) (5)
New functional group combinations in medium rings. 3°-amine salt with sulfoxide (1965) (5)
Photophysics and photochemistry of syn- and anti-dipyrido-substituted tetraazapentalenes: selective photooxidation involving singlet oxygen (1987) (5)
The resolution of sparteine. (1949) (4)
Aralkylation of potassium ethylnitrosolate. Ring closure of nitrosolic acid esters (1976) (4)
Dimensional analog of a dA.cntdot.dT [deoxyadenosine.cntdot.deoxythymidine] base pair devoid of propeller twist (1992) (4)
THE PAPILIONACEOUS ALKALOIDS: XVIII. LUPINUS SERICEUS PURSH. (1953) (4)
The Behavior of 1,2-Diketones at the Dropping Mercury Electrode: an Addendum (1954) (4)
Relatives of Watson‐Crick DNA, RNA Cross Sections a (1986) (4)
Reductive Cyclization. Synthesis of 1-Ethyl-3-phenylpyrrolidine (1951) (4)
Condensation Products of Cyclic 1,2-Diketones with Benzylidene-bis-piperidine and their Spectral Properties (1957) (4)
Ligation with T4 RNA ligase of an oligodeoxyribonucleotide to covalently-linked cross-sectional base-pair analogues of short, normal, and long dimensions. (1991) (4)
Products of Friedel-Crafts acylation of beta-substituted naphthalenes. (1948) (4)
Syn to anti rearrangement of dipyrimidinone-substituted 1,3,4,6-tetraazapentalenes. A covalently-linked cross section representative of base pairing in a double-helical polynucleotide having parallel strands (1989) (4)
Tropolones by Isomerization. II. Substituted 3,7-Dibenzyltropolones1, 2 (1953) (4)
Small charged rings. XIII. Abnormal ring expansion of polycyclic aziridinium salts (1970) (4)
Which 3-ribofuranosyl-substituted purine 5′-phosphates undergo template-directed oligomerization? (1991) (4)
An Improved Procedure for the Synthesis of 1-Alkyladenines : Removal of the Ribofuranosyl Group from 1-Benzyl-, 1-(3-Methyl-2-butenyl)-, and 1-Allyladenosine Hydrobromide in Acetic Acid (1977) (4)
Synthesis of proxl-benzoisoallopurinol (1980) (4)
Dimensional Probes of Enzyme Binding Sites: Synthesis and Biological Activity (1979) (4)
An isomer of thiamin. (1946) (4)
Syntheses, structures, and properties of dipyridazino-fused 1 ,3,4,6-tetraazapentalenes (1988) (4)
CONFIRMATION OF THE STRUCTURE OF THE GUANINE-METHYLMALONDIALDEHYDE REACTION PRODUCT BY UNEQUIVOCAL SYNTHESIS (1981) (4)
Synthesis and structure of a fluorescent, tricyclic analogue of 2'-deoxy-adenosine and of a prodrug by N-annelation of 2'-deoxyguanosine and 9-[(2-hydroxyethoxy)methyl]guanine (acyclovir), respectively (1988) (4)
Rearrangement of α-Aminoketones during Clemmensen Reduction. IX.1 The Fate of Asymmetry at the α-Carbon2 (1953) (4)
Small charged rings. XII. Aziridinium ring opening by carboxylic acids (1970) (3)
Transannular nitrogen-carbonyl interaction. Generation of an .alpha.-acetoxy quaternary ammonium salt (1968) (3)
Octahydropyrrocoline: Resolution and Configuration (1952) (3)
PHOTOPHYSICS OF THE S1 ↔ SO TRANSITION IN TRI-S-TRIAZINE (1985) (3)
The consequences of altering ATP (1984) (3)
Systematic series of azacycl[3.3.3]azines of varying nitrogen content: Nitrogen-15 magnetic resonance spectra (1992) (3)
Derivatives of Diethylamino Compounds (1948) (3)
Additions and Corrections - Synthetic Spectroscopic Models Related to Coenzymes and Base Pairs. II. Evidence for Intramolecular Base-Base Interactions in Dinucleotide Analogs. (1969) (3)
Transannular Reaction Products from 3,10-Dibenzylidene-1,2-cyclodecanedione1 (1958) (3)
The Ultraviolet Absorption Spectra of Dibenzylidene-1,2-cycloalkanediones (1953) (3)
Synthesis of cytosine radiolysis products: cis- and trans-1-carbamoyl-4,5-dihydroxyimidazolidin-2-one (1976) (3)
The synthesis of 4-hydroxyquinolines; quinoline derivatives with sulfur-containing substituents. (1947) (3)
Rearrangement of a 1,4-thiazepine ring nd formation of 3-isothiazolones (1964) (3)
SYNTHESIS OF IMIDAZO(1,5-A)-1,3,5-TRIAZINONES BY CYCLIZATION-REARRANGEMENT (1979) (3)
The Synthesis of β-Hydroxy-γ-Nitrocarbonyl Compounds (1952) (2)
Structure of 3-isoinosine. (1989) (2)
Preparation of chloroacetaldehyde‐l‐14C and its reaction with adenine and cytosine nucleotides (1976) (2)
Reactions of 4-quinazolene; reaction with secondary amines. (1948) (2)
Structure of 6-(2-Phenethyl)purine, a Synthetic Cytokinin (1981) (2)
The Structure of Chloretyl, the Product of the Reaction between Chloral and Biacetyl (1957) (2)
Stereospecific synthesis and oxidative transformation of a synthetic 1,4-thiazepine from D-penicillamine (1964) (2)
Additions and Corrections-3-Isothiazolone-cis-3-Thiocyanoacrylamide Equilibria (1965) (2)
Effect of lin-benzoadenosine and lin-benzoadenosine 3':5'-monophosphate on cyclic AMP-dependent protein kinase activity in vitro. (1978) (2)
Chapter IV Senecio Alkaloids (1950) (2)
Assignment of the Nitrogen-15 Nuclear Magnetic Resonances of Biotin and Unequivocal Synthesis of (+)-[1-^(15)N]Biotin (1981) (2)
CINNOLINES. III. ATTEMPTED SYNTHESES OF THE CINNOLINE NUCLEUS1 (1947) (2)
Bioorganic chemistry-a scientific endeavour in continuous transition (1994) (2)
SELECTIVE ALKYLATION AND ARALKYLATION OF CYTOSINE AT THE 1-POSITION (1982) (2)
The synthesis of 1-(4-hydroxy-3-methyl-cis-but-2-enyl)guanidine, the naturally occurring hydroxygalegine (1972) (2)
Synthesis of covalently-linked double-helical cross sections representative of purine-purine and pyrimidine-pyrimidine duplexes (1987) (2)
THE BROMINATION OF 2-AMINO-4,6-DIMETHYLPYRIMIDINE1 (1945) (2)
2,3-Bis-(p-aminophenyl)-2,3-butanediol (1953) (1)
Nucleoside annelating agents: structures and electrophilic behavior of the products formed with N-chlorocarbonyl isocyanate [Erratum to document cited in CA109(13):110825z] (1989) (1)
Rearrangement of cinnamyl groups from O6 to C-8 in the guanine series (1978) (1)
New Compounds. 4-Nitro-6, 9-dichloroacridine (1947) (1)
A Convenient Synthesis of lin-Benzopurines Through a Common Intermediate. (1988) (1)
Structure of a covalently linked cross-section representative of a hydrogen-bonded dA.dT base pair (1993) (1)
ALLYLIC REARRANGEMENT FROM O6 TO C‐8 IN THE GUANINE SERIES (1973) (1)
Cinnolines; synthesis of 4-hydroxycinnolines. (1946) (1)
Synthesis and Structure of a Fluorescent, Tricyclic Analogue of 2′-Deoxyadenosine and of a Prodrug by N-Anellation of 2′-Deoxyguanosine and 9-((2-Hydroxyethoxy)methyl)guanine (Acyclovir), Respectively. (1989) (1)
PHOSPHATE SYNTHESIS, EXCHANGE AND INTERACTION IN NUCLEOTIDES AND RELATED COMPOUNDS (1980) (1)
Photoaffinity Labeling Reagents to Detect Binding of Cytokinins: Chemical Limitations (1981) (1)
Synthesis of 2′,3′-Dideoxy-3-isoadenosine: A New Structural Analogue of the Anti-HIV Active Compound, 2′,3′-Dideoxyadenosine. (1992) (1)
INTRAMOLECULAR MECHANISM OF THE ALLYLIC REARRANGEMENT FROM O(6) TO C-8 IN THE GUANINE SERIES, DOUBLE LABELING EXPERIMENTS (1974) (1)
AN IMPROVED PROCEDURE FOR THE SYNTHESIS OF 1-ALKYLADENINES- REMOVAL OF THE RIBOFURANOSYL GROUP FROM 1-BENZYL-, 1-(3-METHYL-2-BUTENYL)-, AND 1-ALLYLADENOSINE HYDROBROMIDE IN ACETIC ACID (1977) (1)
1,1,1,3,3,3‐Hexafluoro‐2‐propanol for the Removal of the 4,4′‐ Dimethoxytrityl Protecting Group from the 5′‐Hydroxyl of Acid‐ Sensitive Nucleosides and Nucleotides. (1996) (1)
Nitrogen-15 nuclear magnetic resonance spectroscopy of 5-azacytidine (1981) (1)
6-(3-Methylbut-3-enylamino)pyrine: a highly active cytokinin (1967) (1)
ERRATA. 2-Amino-4-Methyl-6-Methoxymethylpyrimidine, Some Derivatives and Related Compounds. (1945) (1)
Additions and Corrections: Unsaturated Amines. XI. The Course of Formic Acid Reduction of Enamines. (1958) (1)
Annelation of Guanosine by Reaction with Methyl N-Cyanomethanimidate und Sodium Methoxide to give a Tricyclic, Fluorescent Analogue of Adenosine. (1986) (1)
Correction - Synthesis of Medium- and Large-Ring Ketones via Dieckmann Condensation (1959) (0)
Synthesis of Imidazo[4,5-h]-1,3-diazabiphenylene (lin-Benzocyclobutadienopurine), a Ring System Having a Benzocyclobutadieno Spacer between the Terminal Rings of Purine. (1986) (0)
Additions and Corrections: The Structure of Chloretyl, the Product of the Reaction between Chloral and Biacetyl. (1958) (0)
Additons and Corrections - Small Charged Rings. XV. Kinetics and Stereochemistry of th Ring Expansion Reaciton of 2-Arylaziridinium Salts with Benzaldehyde. (1972) (0)
Additions and Corrections - Synthesis and Characterization of Bicyclo[3.3.3]undecane and 1-Azabicyclo[3.3.3]undecane (1971) (0)
Additions and Corrections-Rearrangement of Aminoketones During Clemmensen Reduction. I. Bicyclic Compounds Containing a Bridge-head Nitrogen (1951) (0)
The papilionaceous alkaloids. XI. Identity of genisteine with 1-alpha-isosparteine. (1951) (0)
Synthesis and biological activity of the peroxy-ATP analogue, adenylyl 5'-peroxydiphosphate. (1981) (0)
GUANINE ANALOGS. ALLYL-SUBSTITUTED AMINOIMIDAZO(1,5-A)-1,3,5-TRIAZINONES FORMED BY CYCLIZATION-REARRANGEMENT (1982) (0)
Enzymatic activity and - 32 P labeling of fluorescent derivatives of cytidine triphosphate and adenosine triphosphate. (1973) (0)
SYNTHETIC SPECTROSCOPIC MODELS RELATED TO COENZYMES AND BASE PAIRS PART 13, STEREOCHEMICALLY CONTROLLED PHOTOREACTIONS BETWEEN TWO THYMINE RINGS (1974) (0)
Correction. Reduction Cyclization. A Method for the Synthesis of Tricyclic Compounds Possessing a Bridgehead Nitrogen (1952) (0)
Chapter 14 Lupin Alkaloids (1960) (0)
3-SUBSTITUTED ADENINES. IN VITRO ENZYME INHIBITION AND ANTIVIRAL ACTIVITY (1979) (0)
STRETCHED-OUT VERSIONS OF ATP: SYNTHESIS, FLUORESCENCE AND BIOLOGICAL ACTIVITY (1984) (0)
Nucleoside Annelating Reagents: N-(tert-Butoxycarbonyl)-2-bromoacetamide and 2-Chloroketene Diethyl Acetal. (1986) (0)
Stereochemistry of the anomers of methyl 2-deoxy-D-ribofuranoside. Synthesis of methyl 5-(6-aminopurin-9-yl)-2,5-dideoxy-alpha-D-ribofuranoside, a "reversed" nucleoside. (1968) (0)
Pyrimidinone Ring Opening and Reclosure on a 1,3,4,6-Tetraazapentalene System: Syn to Anti Iosmerization. (1989) (0)
SPECIES RESPONSIBLE FOR THE FLUORESCENCE OF 3,N4-ETHENOCYTIDINE (1977) (0)
Preface to the Special Issue of HETEROCYCLES in Honour of Dr. Arnold Brossi (1994) (0)
THE ANGULAR BENZOADENINES, 9-AMINOIMIDAZO(4,5-F)QUINAZOLINE AND 6-AMINOIMIDAZO(4,5-H)QUINAZOLINE (1975) (0)
Some 4-diethylamino-1-methylbutylaminopyrimidines. (1947) (0)
2,4,6-TRISUBSTITUTED PYRIDINES, SYNTHESIS, FLUORESCENCE, AND SCINTILLATOR PROPERTIES (1973) (0)
A Masked [π8 +π2] Cycloaddition Reaction Involving the 1,3,4,6-Tetraazapentalene Ring System. (1986) (0)
Fluorescent Heterocyclic Systems: Syntheses, Structures, and Physicochemical Properties of Dipyrido-Substituted 1,3,4,6-Tetraazapentalenes. (1987) (0)
The Synthesis of Dihydrotriacanthine1 (1962) (0)
Cinnolines; attempted syntheses of the cinnoline nucleus. (1947) (0)
Structure of 3-Isoinosine (1990) (0)
Additions and Corrections: Rearrangement of a-Aminoketones during Clemmensen Reduction. XI. The Reduction of Atom-bridged Bicyclic a-Aminoketones. (1958) (0)
Utilization of a Syn to Anti Rearrangement for the Construction of a Centrosymmetric, Covalently Linked Cross Section That Would Direct Parallel Strandedness in a Double-Helical Polynucleotide. (1991) (0)
SYNTHESIS OF 2′-DEOXYNUCLEOSIDES BY DEOXYGENATION OF RIBONUCLEOSIDES (1982) (0)
Dissymmetry of Certain Substituted Dipyridotetraazapentalenes. (1988) (0)
Rearrangement of alpha-Aminoketones during Clemmensen Reduction. IX. The Fate of Asymmetry at the alpha-Carbon - Correction (1953) (0)
Progress in Organic Chemistry. (1954) (0)
Azido Auxins ' PHOTOAFHNITY LABELING OF AUXIN-BINDING PROTEINS IN MAIZE COLEOPTILE WITH TRITIATED 5-AZIDOINDOLE-3-ACETIC ACID (0)
Additions and Corrections - 2,4,6-Trisubstituted Pyridines. Synthesis, Fluorescence, and Scintillator Properties. (1974) (0)
Additions and Corrections-Transannular Interaction between Sulfide and Ketone Groups (1960) (0)
Cytokinins: Synthesis andBiological Activity ofGeometric and Position Isomers ofZeatin' (1972) (0)
DEFINED DIMENSIONAL CHANGES IN ENZYME SUBSTRATES AND COFACTORS. SYNTHESIS OF LIN-BENZOADENOSINE AND ENZYMIC EVALUATION OF DERIVATIVES OF THE BENZOPURINES (1976) (0)
Synthesis of Covalently Linked Double-Helical Cross Sections Representative of Purine-Pyrimidine, Purine-Purine, and Pyrimidine-Pyrimidine Duplexes. (1990) (0)
Correction. The Synthesis of 3-β-(3'-Deoxy-D-ribofuranosyl)adenine, and Isomer of Cordycepin (1970) (0)
REARRANGEMENTS OF AZABIPHENYLENES. THE IMPACT OF NITROGEN NUMBER AND POSITION (1985) (0)
TheModeofIncorporation of6-Benzylaminopurine (1974) (0)
Preparation and characterization of polyclonal and monoclonal antibodies specific for covalently linked DNA/RNA cross sections. (1994) (0)
A Resolvable Octaheterohelicene Based on the 1,3,4,6-Tetraazapentalene Ring System. (1990) (0)
Nonenzymatic Synthesis and Properties of 5-Aminoimidazole Ribonucleotide (AIR). Synthesis of Specifically 15N-Labeled 5-Aminoimidazole Ribonucleoside (AIRs) Derivatives. (1990) (0)
Determination of Organic Structures by Physical Methods. Volume 2. (1962) (0)
Synthesis and biological activity of a profluorescent analogue of coenzyme (0)
Spectroscopic sensitivity oflinear-benzoadenine nucleotides to divalent metalcounterions, sidechainconformations, micelles, andenzymes (1978) (0)
Synthesis of Covalently Linked DNA/RNA Cross Sections. (1986) (0)
Broadened Scope of Translocative Rearrangements. Substituted 1,2,3-Triazolo[1,5-a]-1,3,5-triazines. (1986) (0)
Effect of 3-isothiazolone on human cancer cells. (1971) (0)
Additions and Corrections - Unsaturated Amines. IX. Through Bis-enamines to Aromatics (1956) (0)
Photoemission Properties of Methyl‐Substituted Guanines: Photoelectron and Fluorescence Investigations of 1,9‐Dimethylguanine (I), O6,9‐Dimethylguanine (II), and 9‐Methylguanine (1990) (0)
DIE SYNTH. VON 1‐(4‐HYDROXY‐3‐METHYL‐CIS‐BUT‐2‐ENYL)‐GUANIDIN, DEM NATUERLICH VORKOMMENDEM HYDROXYGALEGIN (1972) (0)
Defined Dimensional Alterations in Enzyme Substrates. Birch Reduction of lin-Benzopurines. A Contribution to Information Concerning the Binding Sites of Adenosine Deaminase and Xanthine Oxidase. (1989) (0)
Defined Dimensional Alterations in Enzyme Substrates. General Synthetic Methodology for the Bent Dihydro-lin-benzopurines. (1986) (0)
LINEAR BENZOADENINE, A STRETCHED-OUT ANALOG OF ADENINE (1975) (0)
ALLYLIC REARRANGEMENT FROM O6 TO N-3 AND N-7 OF GUANINE BLOCKED AT C-8 (1976) (0)
Cytokinin activity in tRNA-Phe. (1970) (0)
Purines. Part 28. Preparation of Some 3,7-Dialkyladenines from 3-Alkyladenines by Alkylation: A Subordinate Formation of 3,9-Dialkyladenines. (1986) (0)
Nucleoside Annelating Agents: Structures and Electrophilic Behavior of the Products Formed with N-Chlorocarbonyl Isocyanate. (1989) (0)
Syntheses, Structures, and Properties of Dipyridazino-Fused 1,3,4,6-Tetraazapentalenes. (1988) (0)
The “Chemistry” of Research Collaboration (1997) (0)
SYNTHETIC SPECTROSCOPIC MODELS PART 14, INTRAMOLECULAR STACKING INTERACTIONS BETWEEN INDOLE AND CONNECTED NUCLEIC ACID BASES, HYPOCHROMISM AND FLUORESCENCE (1975) (0)
Substituted ethenoadenosines and ethenocytidines. (1986) (0)
Correction. Small Charged Rings. X. Expansion of the Aziridinium Ring by Reaction with Nitrones. (1970) (0)
Additions and Corrections-Small Charged Rings. IV. Expansion of the Aziridinium Ring by Reaction with ALdehydes (1965) (0)
SYNTHESIS AND VALENCE ORBITAL STRUCTURES OF AZACYCL(3.3.3)AZINES IN A SYSTEMATIC SERIES (1985) (0)
Methodology for the Synthesis of Dinucleoside Monophosphates Containing a 2′‐Deoxy‐3‐isoadenosine Unit: 3‐iso‐dApT and Tp(3‐iso‐dA). (1996) (0)
Photophysics and Photochemistry of syn- and anti-Dipyrido-Substituted Tetraazapentalenes. Selective Photooxidation Involving Singlet Oxygen. (1987) (0)
Chapter 19 Lupin Alkaloids (1953) (0)
Additions and Corrections - Synthetic Spectroscopic Models Related to Coenzymes and Base Pairs. An "Abbreviated" Nicotinamide Adenine Dinucleotide (1972) (0)
, Occolowitz J, Burrows WJ, Armstrong DJ, Skoog F, Bock RM, Gillam I, Tener GM: Cytokinins: isolation identification of 6-(3-methyl-2-butenylamino)-9-beta-D-ribyfuranosylpurine (2iPA) from yeast cysteine tRNA. (1969) (0)
CYTOKININS, SYNTHESIS OF 2-, 8- AND 2,8-SUBSTITUTED 6-(3-METHYL-2-BUTENYLAMINO)PURINS AND THEIR RELATIVE ACTIVITIES IN PROMOTING CELL GROWTH (1974) (0)
SITE OF N-AMINATION OF ADENINE AND ALKYLADENINES (1975) (0)
Examples of the Use of Fluorescent. Heterocycles in Chemistry and Biology (1976) (0)
Additions and Corrections - The Synthesis of 3-(2'-Deoxy-D-ribofuranosyl)adenine. Application of a New Protecting Group, Pivaloxymethyl (pom) (1968) (0)

This paper list is powered by the following services:

Nelson J. Leonard's Academic­Influence.com Rankings

Nelson J. Leonard's Degrees

Why Is Nelson J. Leonard Influential?

Nelson J. Leonard's Published Works

Published Works

Nelson J. Leonard's AcademicInfluence.com Rankings