Heinz Falk
#101,721
Most Influential Person Now
Professor emeritus of Organic Chemistry, Johannes-Kepler University Linz
Heinz Falk's AcademicInfluence.com Rankings
Heinz Falkchemistry Degrees
Chemistry
#2682
World Rank
#3622
Historical Rank
Organic Chemistry
#634
World Rank
#726
Historical Rank
Download Badge
Chemistry
Why Is Heinz Falk Influential?
(Suggest an Edit or Addition)According to Wikipedia, Heinz Falk is professor emeritus for organic chemistry at Johannes Kepler University of Linz and editor of "Progress in the Chemistry of Organic Natural Compounds". His research is focused on structural analysis, synthesis, stereochemistry and photochemistry of plant and animal photosensitizing and photosensory pigments, such as hypericin.
Heinz Falk'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
- The Chemistry of Linear Oligopyrroles and Bile Pigments (1989) (427)
- Progress in the Chemistry of Organic Natural Products (1979) (223)
- Accurate measurement of avidin and streptavidin in crude biofluids with a new, optimized biotin-fluorescein conjugate. (1999) (139)
- A convenient semisynthetic route to hypericin (1993) (87)
- On the homo- and heteroassociation of hypericin (1994) (83)
- Rapid estimation of avidin and streptavidin by fluorescence quenching or fluorescence polarization. (1999) (82)
- Toxicity of D-galactosamine for rat hepatocytes in monolayer culture. (1985) (70)
- On the nature of “soluble” hypericin inHypericum species (1992) (58)
- The TEMPO/Copper Catalyzed Oxidation of Primary Alcohols to Aldehydes Using Oxygen as Stoichiometric Oxidant (2005) (55)
- Force field calculations on linear polypyrrole systems (1983) (49)
- The configurations of the isomeric 3,4-dimethyl-5-(1h)-2,2′-pyrromethenones (1975) (48)
- Preservation of hypericin and related polycyclic quinone pigments in fossil crinoids (2006) (43)
- Tautomerism and stereochemistry of hypericin: Force field, NMR, and X-ray crystallographic investigations (1993) (42)
- On the synthesis of hypericin by oxidative trimethylemodin anthrone and emodin anthrone dimerization: Isohypericin (1992) (41)
- On the Chemistry of the Resveratrol Diastereomers (2003) (41)
- Structure determination of the biliverdin apomyoglobin complex: crystal structure analysis of two crystal forms at 1.4 and 1.5 A resolution. (1995) (38)
- A synthesis of emodin anthrone (1991) (36)
- In Vitro Study of the Photocytotoxicity of Some Hypericin Analogs on Different Cell Lines (2001) (35)
- Deprotonation and protonation of hydroxyphenanthroperylenes (1992) (33)
- On the Chemistry of Pyrrole Pigments. 461 Phytochrome Model Studies: The Tautomerism at N22—N23 of Unsymmetrically Substituted Bilatrienes‐abc and 2,3‐Dihydrobilatrienes‐abc (1983) (32)
- Crystal structure of the mono-lactim ether of a bilatriene- abc derivative at 101 k (1983) (28)
- The deprotonation and protonation equilibria of a hypericin derivative in aqueous solution (1997) (27)
- Boron-containing organic pigments from a Jurassic red alga (2010) (24)
- Structure and Absolute Configuration of Jurassic Polyketide-Derived Spiroborate Pigments Obtained from Microgram Quantities. (2015) (22)
- On the bromination of hypericin: The gymnochrome chromophores (1993) (22)
- Molecular interactions and correlation phenomena between pressure shift and solvent shift: a spectral hole-burning study (1993) (21)
- Lowest excited triplet states of hypericin and isohypericin. (1993) (21)
- Cationic Hypericin Derivatives as Novel Agents with Photobactericidal Activity: Synthesis and Photodynamic Inactivation of Propionibacterium acnes (2009) (21)
- Spectroscopic Investigation of the Molecular Structure of Hypericin and its Salts (1999) (21)
- On the chemistry of pyrrole pigments, XLI: Force field calculations on bile pigments: The energy hypersurface of verdinoid pigments (1981) (20)
- On the chemistry of pyrrole pigments, XI.: The light absorption of the geometrical isomers of arylmethylidene-pyrrolinones?Conformational analysis (1975) (20)
- On the tautomerism of hypericin: The 1,6-dioxo tautomer (1993) (20)
- The Protonation and Deprotonation Equilibria of Hypericin Revisited (2002) (19)
- On the chemistry of pyrrole pigments, XCVI: An efficient synthesis of corrphycenes (1996) (19)
- Structural aspects of native and acid or enzyme degraded amylopectins : a 13C NMR study (1996) (18)
- On the molecular structure of the phytochrome chromophore: X-ray analysis of two 2,3-dihydrobilatriene-abc derivatives (1985) (18)
- Synthesis and Properties of Hypericins Substituted with Acidic and Basic Residues: Hypericin Tetrasulfonic Acid – A Water Soluble Hypericin Derivative (1998) (18)
- Synthesis and properties of fringelite D (1,3,4,6,8,10,11,13-octahydroxy-phenanthro[1,10,9,8,o,p,q,r,a]perylene-7,14-dione) (1995) (18)
- Beiträge zur Chemie der Pyrrolpigmente, XXIII [1] Die Struktur eines Bilatrien-abc-Derivates im gelösten Zustande / On the Chemistry of Pyrrole Pigments, XXIII [1] The Structure of a Bilatriene-abc Derivative in the State of Solution (1978) (16)
- Two-dimensional1H and13C NMR spectroscopy and the structural aspects of amylose and amylopectin (1997) (16)
- An efficient regioselective synthesis of endocrocin and structural related natural anthraquinones starting from emodin (2005) (16)
- Photoreactive, water-soluble conjugates of hypericin with polyphosphazenes (2012) (16)
- The structure of “photobilirubin” (1982) (16)
- syn- and anti-Conformation in oxodipyrromethenes: crystal and molecular structure of 3,4-dimethyl-2,2′-pyrromethen-5(1H)-one and its N-methyl derivative (1979) (16)
- Toward Hypericin-derived Potential Photodynamic Therapy Agents¶ (2001) (15)
- A Convenient Semisynthetic Route to Hypericin. (1993) (15)
- Progress in the Chemistry of Organic Natural Products 99 (2014) (15)
- Concerning chemistry, reactivity, and mechanism of transition metal catalysed oxidation of benzylic compounds by means of ozone (2005) (15)
- Synthesis and properties of an ω,ω′-appended eighteen carbon chains hypericin derivative (1996) (14)
- Spatially and temporally resolved temperature profiles in graphite furnaces (1986) (14)
- Reconstitution of apomyoglobin with bile pigments (1990) (14)
- Natural Product Molecular Fossils. (2017) (14)
- Complex formation between biliverdin and apomyoglobin (1989) (13)
- An Efficient Synthesis of O-Methyl Protected Emodin Aldehyde and Emodin Nitrile (2003) (13)
- Optically Active 2‐Methylazaferrocene (1969) (13)
- Generation of Singlet Oxygen from Ozone Catalysed by Phosphinoferrocenes (2005) (13)
- Preparation and nuclear magnetic resonance spectroscopy of [Ag2{µ-CH2(PPh2)2}3][O3SCF3]2, a disilver(I) complex with three bridging CH2(PPh2)2 ligands (1988) (12)
- A Structural Proof for the Hypericin 1,6-Dioxo Tautomer (1999) (12)
- Concerning the Thermal Diastereomerization of the Green Fluorescent Protein Chromophore (2006) (12)
- A Geometrically Isomeric Bilatriene‐abc (1977) (12)
- Fortschritte der Chemie organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products, Vol. 92 (2010) (11)
- Eine formal nucleophile Substitution an Bilatrienen-abc (1978) (11)
- Structural aspects and electronic absorption of the hydroxyphenanthroperylene quinones fringelit D, hypericin, and stentorin (1996) (11)
- Tautomerism and stereochemistry of dihydroxyperylenequinones: Force field investigations (1993) (11)
- On the chemistry of pyrrole pigments: 57—Phytochrome model studies: Complete assignments of the 13C NMR spectra of phytochrome model compounds (1984) (11)
- The Absolute Configuration of [2.2]Paracyclophanecarboxylic Acid (1968) (11)
- A linear dichroism study of pyrromethene-, pyrromethenone- and bilatriene-abc-derivatives (1986) (11)
- Concerningbay salt andperi chelate formation of hydroxyphenanthroperylene quinones (fringelites) (1997) (11)
- A novel reaction of 11,11,12,12-tetracyanoanthraquinodimethane: The formation of 10-dicyanomethylene-anthrone hydrazone (1994) (11)
- Concerning the Hypericin Sensitized Photooxidation of Bilirubin IXα (1999) (11)
- On the chemistry of pyrrole pigments, IX.: Syntheses, structures and configurations of Z- and E-arylmethylidene-3.4-dimethyl-3-pyrroline-2-ones (1975) (11)
- The absolute configurations of (α-keto- and α-keto-β-phenyl-tetramethylene)-cyclopentadienylmanganese tricarbonyl (1965) (10)
- Concerning the absorption and emission properties of phenanthro[1,10,9,8,o,p,q,r,a]perylene-7,14-dione (1995) (10)
- Simple diffuse reflectance UV-vis spectroscopic determination of organic pigments (fringelites) in fossils (1994) (10)
- Syntheses and Properties of Two Heterocyclically Substituted Hypericin Derivatives: 10,11-Dibenzothiazolyl-10,11-didemethylhypericin and 10,11-Dibenzoxazolyl-10,11-didemethylhypericin (2005) (10)
- Chiroptical properties and absolute configurations of the hypericin chromophore propeller enantiomers (1997) (10)
- Condensed Emodin Derivatives and Their Applicability for the Synthesis of a Fused Heterocyclic Hypericin Derivative (2006) (10)
- A microwave-assisted synthesis of phenanthroperylene quinones as exemplified with hypericin (2008) (10)
- The molecular and crystal structures of two diastereomeric 3,4-dihydropyrromethenones (1985) (10)
- An Efficient Route to Emodic Amine and Analogous O-Methyl Protected Derivatives Starting from Emodin (2005) (10)
- Concerning the acidity and hydrogen bonding of hydroxyphenanthroperylene quinones like fringelite D, hypericin, and stentorin (1996) (9)
- Investigation of the Branching Characteristic of Glycogen by Means of Two-Dimensional1H and 13C NMR Spectroscopy (1998) (9)
- Tautomerism and stereochemistry of isohypericin, bromohypericines, and gymnochromes: Force field investigations (1993) (9)
- Beiträge zur Chemie der Pyrrolpigmente, XXXVI [1] Zur anaeroben Photochemie von 21.24 - Diinethy 1 - aetiobiIi verdin -IV -γ / On the Chemistry of Pyrrole Pigments, XXXVI [1] On the Anaerobic Photochemistry of 21,24-Dimethyl-aetiobiliverdin-IV -γ (1980) (9)
- On the chemistry of Baltic amber inclusion droplets (1997) (9)
- On the chemistry of pyrrole pigments, XCII: Syntheses of 1,2-bis-pyrrolylethanes (1995) (9)
- 1,2-bis-Dipyrrinon-9-yl-ethene — a novelb-homo-verdian chromophore: the reaction of 9-methyl-10H-dipyrrin-1-ones with bromine (1995) (9)
- Structural Aspects of Partially Acetylated Degraded Amylopectins — A 13C NMR Study (1997) (9)
- Stereochemistry and tautomerism of stentorin, isostentorin, and fringelit D: Force field investigations (1994) (9)
- The Dissociation and Tautomerization Equilibria of Hypericin: Alkyl Protected Hydroxyl Derivatives (1998) (9)
- On the chemistry of pyrrole pigments, XCIV: 1-(Dipyrrinon-9-yl)-3-(dipyrrinon-9-ylidene)-1-propene — a novelb-vinylogous verdin chromophore (1995) (9)
- The Absolute Configuration of 1,2‐(α‐Oxotetramethylene)ferrocene (1964) (9)
- Synthesis and Properties of Ionophore Conjugated Hypericin Derivatives (1998) (9)
- Progress in the Chemistry of Organic Natural Products 106 (2017) (9)
- The crystal and molecular structures of the diastereomeric (4Z)- and (4E)-3-oxo-2,3-dihydrobilatrienes-abc (1985) (8)
- Concerning the enantiomerization barrier of hypericin (1997) (8)
- In vitro study of the photocytotoxicity of bathochromically-shifted hypericin derivatives. (2009) (8)
- Structure and Stereochemistry (1989) (8)
- Concerning the Absorption and Photochemical Properties of an ω-4-Dimethylaminobenzal Hypericin Derivative (2001) (8)
- Phagocytosis activity as an in vitro test for the effects of chronic exposure of rainbow trout to Linuron, a herbicide (1990) (8)
- On the chemistry of pyrrole pigments, XCI: Copper complexes of pyridinologous linear tri- and tetra-pyrroles as cyclopropanation catalysts (1994) (8)
- Concerning the Chiral Discrimination and Helix Inversion Barrier in Hypericinates and Hypericin Derivatives (2002) (8)
- On the Chemistry of Pyrrole Pigments. 60 —Natural isotopic abundance 15N NMR spectra of verdinoid bile pigments and their partial structures (1985) (8)
- Concerning the Dissociation of Hypericin: An Atmospheric Pressure Ionization Mass Spectrometric Study (1998) (8)
- On the chemistry of pyrrole pigments, XC: Pyridinologous linear tri- and tetrapyrroles (1993) (8)
- A Route to Amino Functionalized Hypericin Derivatives and their Chemical and Photochemical Properties Pertaining to Photodynamic Therapy (2005) (8)
- A novel 16,24-dehydrobiladiene-ab system: The reaction of xanthobilirubic acid methyl ester with bromine (1995) (7)
- Syntheses, constitutions and properties of stentorin and isostentorin (1995) (7)
- Synthesis and Properties of 10,11-Dibenz-imidazolyl-10,11-didesmethyl-hypericin – The First Heterocyclically Substituted Hypericin Derivative (2004) (7)
- 9,12-Dibenzothiazolylhypericin and 10,11-Dibenzothiazolyl-10,11-didemethylhypericin: Photochemical Properties of Hypericin Derivatives Depending on the Substitution Site (2005) (7)
- On the chemistry of pyrrole pigments, XCIII: 1,2-bis-(dipyrrinon-9-ylidene)-ethane — a novelb-homoverdin chromophore (1995) (7)
- Crystal and molecular structure of a photoisomer of an oxodipyrromethene: the E-isomer of 3,4-dimethyl-2,2′-pyrromethen-5(1H)-one (1982) (7)
- Progress in the Chemistry of Organic Natural Products 105 (2017) (7)
- Concerning the Photodiastereomerization and Protic Equilibria of Urocanic Acid and its Complex with Human Serum Albumin (2004) (7)
- On the chemistry of pyrrole pigments, XCV: 1,4-bis-(dipyrrinone-9-ylidene)-butene-2 — A novelb-homo-verdin chromophore (1995) (7)
- Concerning the Structural Complexity of Hypericin: The Relative Stabilities of Some Neutral and Deprotonated Tautomers (1998) (7)
- Crystal structure and conformation of 10-aryl-bilatrienes-abc (1991) (7)
- On the chemistry of pyrrole pigments, LXXXVII: The apomyoglobin heme pocket as a reaction vessel in bile pigment chemistry (1990) (6)
- On the chemistry of pyrrole pigments, XCVII: Synthesis, stereochemistry, and solvatochromic effects of a 1-(dipyrrinon-9-yl)-3-(dipyrrinon-9-ylidene)-1-propene (1996) (6)
- Concerning the Association of Hypericin Tautomers and their Hypericinate Ions (2000) (6)
- The synthesis of N-substituted ureas I: The N-alkylation of ureas (1992) (6)
- Progress in the Chemistry of Second Generation Hypericin-Based Photosensitizers (2012) (6)
- On the synthesis of ω-appended hypericin derivatives (1995) (6)
- Synthesis and properties of unique mesoionic 1,3-thiazolium-4-olates (1996) (6)
- UV-VIS and CD-spectroscopic investigations of intermolecular interactions of bile pigments with small proteins (1989) (6)
- An efficient synthesis of the plant growth hormone 1-triacontanol (1995) (6)
- On the Photochemical Proton Expulsion Capability of Fringelite D – A Model of the Protist Photosensory Pigments of the Stentorin and Blepharismin Types (2000) (5)
- Syntheses, Photochemical Properties, and Tautomerism of Intramolecularly Friedel-Crafts Acylated Hypericin Derivatives (2005) (5)
- A carbohydrate-linked hypericinic photosensitizing agent (2008) (5)
- Concerning Regioselective Photochemical Intermolecular Proton Transfer from Hypericin (1999) (5)
- ω,ω′-Appended nucleo-base derivatives of hypericin (2008) (5)
- Zur regioselektiven nucleophilen Addition an 2,3-Dihydrobilatriene-abc (1985) (5)
- On the synthesis and chiroptical properties of the tri- and tetragalloylquinic acids (1995) (5)
- On the chemistry of pyrrole pigments, LXXXVIII: Nonlinear optical properties of linear oligopyrroles (1992) (5)
- ENOL DERIVATIVES OF THE CHLOROPHYLL SERIES. PREPARATION OF 132,173-CYCLOPHEOPHORBIDE ENOLS (1976) (5)
- Progress in the Chemistry of Organic Natural Products 102 (2016) (5)
- ω,ω′-Urea- and -dithioacetal-derivatives of hypericin (2008) (5)
- An Efficient Regioselective Synthesis of Endocrocin and Structural Related Natural Anthraquinones Starting from Emodin. (2005) (5)
- Efficient Routes to ω-Chloroalkyl Bilirubins and C12-N22 Bridged Biliverdins (2001) (4)
- A Unique Photoreaction of Hypericinate Bound to Human Serum Albumin, Lipids, or Vesicles (2003) (4)
- Nuclear-magnetic-resonance investigations of the biliverdin-apomyoglobin complex. (1990) (4)
- The reactions of Cr(CO)5PRH2 (R = Ph or cyclohexyl) complexes with mercury(II) and silver(I) compounds (1987) (4)
- The Thermal Diastereomerization of the Tryptophane-Derived Green Fluorescent Protein Chromophore (2007) (4)
- Concerning the Deprotonation of the Photooxidized 3-Hypericinate Ion (1999) (4)
- CONTRIBUTIONS TO THE CHEMISTRY OF PYRROLE PIGMENTS, XXIV: THE RELATION BETWEEN LIGHT ABSORPTION AND STRUCTURE OF BILATRIENES-ABC (1979) (3)
- Selected Physical Properties (1989) (3)
- Progress in the Chemistry of Organic Natural Products 111 (2020) (3)
- An Unusual Photoreaction of 3,4-Di-O-benzyl-hypericin (2000) (3)
- Progress in the Chemistry of Organic Natural Products 100 (2015) (3)
- Concerning the question of covalent bonding in hypericin-chromoproteins: Schiff base formation? (1994) (3)
- On synthesis and properties of hypericin-porphyrin hybrids (2008) (3)
- Progress in the Chemistry of Organic Natural Products 101 (2016) (3)
- The synthesis of N-substituted ureas II: Nucleophilic substitution of ureas at the carbonyl group (1992) (3)
- On the Ground State Energy Hypersurface of Blepharismins and Oxyblepharismins (2000) (3)
- LIGHT DRIVEN TRANSPORT OF BILIRUBIN THROUGH A BULK LIQUID MEMBRANE (1983) (3)
- Methoxyxanthobilirubinic acid methyl ester (methyl 3-{5-[(3-ethyl-5-methoxy-4-methyl-2H-pyrrol-2-ylidene)methyl]-2,4-dimethyl-3-pyrrolyl}propanoate), C19H26N2O3 (1983) (3)
- On the chemistry of pyrrole pigments, XXXI: Spin-lattice-relaxation in the1H-NMR-spectra of bilatrienes-abc (1979) (3)
- Synthesis of 6-Heterocyclically Appended Tri-O-methyl Protected 6-Desmethyl Emodin Derivatives (2004) (2)
- Studies on biliprotein model compounds: Cars, picosecond time-resolved absorption and emission spectroscopy of a tryptophan-substituted 2,3-dihydro-bilatriene (1988) (2)
- CONTRIBUTIONS TO THE CHEMISTRY OF PYRROLE PIGMENTS. PART XXXV: A REGIOSELECTIVE REVERSIBLE ADDITION TO BILATRIENES-ABC (1980) (2)
- Reduction of a bilindione-10-thiol-adduct as a model of the reduction step of the biliverdin reductase system (1991) (2)
- Fortschritte der Chemie organischer Naturstoffe / Progress in the Chemistry of Organic Natural Products, Vol. 93 (2010) (2)
- A Microwave-Assisted Synthesis of Phenanthroperylene Quinones as Exemplified with Hypericin. (2008) (2)
- The tautomeric equilibrium of bilirubin (1976) (2)
- A Chemical (Dark) Source of Singlet Oxygen: Ozone Splitting Promoted by Tin(II) Salts (2004) (2)
- Replacement of Methoxy by tert-Butyl on a Naphthalene Residue: An Unexpected Reaction During a Snieckus ortho-Lithiation (2001) (2)
- The Synthesis of Hypericin by Oxidative Trimethylemodin Anthrone and Emodin Anthrone Dimerization: Isohypericin. (1993) (2)
- Synthesis and Properties of an ω,ω′-Appended Eighteen Carbon Chains Hypericin Derivative. (1996) (2)
- On the chemical nature of 10-dicyanomethylene-anthrone hydrazone (1994) (2)
- Intramolecularly Friedel-Crafts Acylated Emodin Derivatives. An Access to the Cores of Angucyclinones, Anthracyclinones, and to Hypericin Analogues (2005) (2)
- Homorubins and homoverdins (2014) (2)
- 2-(10-Diazo-10H-anthracen-9-ylidene)-malonodinitrile: A convenient precursor of 9,10-disubstituted anthracenes (1995) (2)
- On the chemistry of pyrrole pigments, LXXXIX: Vinylogous linear di- and tetrapyrroles (1992) (2)
- On the chemistry of pyrrole pigments, VIII.: Concerning the Brunings-Corwin-effect of dipyrromethene derivatives (1975) (2)
- A Remarkable Photoreaction of 3-O-Benzylhypericin (2000) (2)
- Progress in the Chemistry of Organic Natural Products 109 (2019) (1)
- Investigation of the Branching Characteristic of Glycogen by Means of Two-Dimensional 1H and 13C NMR Spectroscopy. (1998) (1)
- A Novel Reaction of 11,11,12,12‐Tetracyanoanthraquinodimethane: The Formation of 10‐Dicyanomethylene‐anthrone Hydrazone. (1994) (1)
- On the Chemistry of a Dibenzohypericin Derivative (2002) (1)
- Efficient Synthesis of the Plant Growth Hormone 1-Triacontanol. (1995) (1)
- On the chemistry of pyrrole pigments, IXXX: the anaerobic photochemistry of bile pigments: on the mechanism of the photoisomerization at exocyclic double bonds (1980) (1)
- Concerning the Diastereomerization of Stilbenoid Hypericin Derivatives (2002) (1)
- Synthesis and X-ray crystal structure of a (15E)-dihydrobilatriene-abc-derivate (1987) (1)
- Synthesis of ω-Appended Hypericin Derivatives. (1996) (1)
- A Synthesis of Emodin Anthrone. (1992) (1)
- A Hemin-Analogous Corrphycene Derivative: Suppression of Heme Oxygenase and Reconstitution with Apomyoglobin (2003) (1)
- On the Chemistry of Pyrrole Pigments. Part 92. Syntheses of 1,2‐Bis( pyrrolyl‐2)‐ethanes. (1995) (1)
- CHEMISTRY OF PYRROLE PIGMENTS, XV. THE LACTAM‐LACTIM TAUTOMERISM OF BILE PIGMENTS (1977) (1)
- Synthesis and Properties of 10,11-Dibenzimidazolyl-10,11-didesmethylhypericin — The First Heterocyclically Substituted Hypericin Derivative. (2005) (1)
- Structural Aspects and Electronic Absorption of the Hydroxyphenanthroperylene Quinones Fringelit D (Ib), Hypericin (Ia), and Stentorin (Ic). (2010) (1)
- Occurrence, Formation, and Importance (1989) (1)
- On the chemistry of pyrrole pigments, XXV.: The diastereomeric (geometrically isomeric) biliverdindimethylesters?Structure, configuration and conformation (1979) (1)
- ON THE CHEMISTRY OF PYRROLE PIGMENTS, XXXIII. SYNTHESIS, STRUCTURE AND PROPERTIES OF ISOMERIC N-METHYLBILATRIENES-ABC (N-METHYLETIOBILIVERDINS-IV-Γ) (1980) (1)
- and 10,11-Dibenzothiazolyl-10,11- didemethylhypericin: Photochemical Properties of Hypericin Derivatives Depending on the Substitution Site (2006) (1)
- Evidence for the Generation of Singlet Oxygen (1O2, 1Δg) from Ozone Promoted by Inorganic Salts (2003) (1)
- Chemistry of a Dibenzohypericin Derivative. (2002) (1)
- Fringelite D, a Model of the Protist Photosensory Pigments of the Stentorinand Blepharismin Types: The Hypericinand Fringelite D PhotosensitizedDestruction of Bilirubin (2000) (1)
- Ozone as an oxygen source for alkene ene-reactions (1995) (1)
- Concerning the reaction of 2-(10-diazo-10H-anthracen-9-ylidene)-malonodinitrile and related compounds with the cryptohydride system formic acid-triethylamine (1995) (1)
- Chemistry of Bile Pigments. Part 85. Preparation and Luminescence of Hetero‐Bichromophoric Oligopyrrole Systems. (1990) (0)
- Chemistry of Pyrrole Pigments. Part 96. An Efficient Synthesis of Corrphycenes. (1996) (0)
- hypericin - The First Heterocyclically Substituted Hypericin Derivative # (2004) (0)
- SYNTHESIS AND PROPERTIES OF AN OMEGA , OMEGA '-APPENDED EIGHTEEN CARBON CHAINS HYPERICIN DERIVATIVE (1996) (0)
- Stereochemistry and Tautomerism of Stentorin, Isostentorin, and Fringelit D: Force Field Investigations. (1995) (0)
- The TEMPO/Copper Catalyzed Oxidation of Primary Alcohols to Aldehydes Using Oxygen as Stoichiometric Oxidant. (2006) (0)
- PHOTOCHEMICAL (Z) ⇄ (E) ISOMERIZATION OF BILE PIGMENT PARTIAL STRUCTURES (1978) (0)
- Short Communication A Convenient Semisynthetic Route to Hypericin (1993) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 31. SPIN-LATTICE RELAXATION IN THE PROTON NMR SPECTRA OF BILATRIENES-ABC (1980) (0)
- Chemistry of Pyrrole Pigments. Part 71. The Rubin (Biladiene-ac) → Violin (Biladiene-ab) - Tautomerization. (1987) (0)
- Chemistry of Pyrrole Pigments. Part 69. Tripyrrines of the Prodigiosene Type as Ionophores. (1987) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. PART XXVII. THE ANAEROBIC PHOTOCHEMISTRY OF BILE PIGMENTS: THE REACTION DICHOTOMY OF THE PHOTOISOMERIZATION AT EXOCYCLIC DOUBLE BONDS (1980) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. XLIII. THE TEMPERATURE DEPENDENCE OF LIGHT ABSORPTION OF BILIRUBIN AND SOME OF ITS DERIVATIVES (1982) (0)
- On the chemistry of pyrrole pigments, LVIII. Phytochrome model studies: Conformational analysis of 2,3-dihydrobilatriene-abc derivatives (1985) (0)
- CONTRIBUTIONS TO THE CHEMISTRY OF PYRROLE PIGMENTS, 22: THE SELECTIVITY OF PHOTOCHEMICAL ISOMERIZATIONS OF BIFUNCTIONAL AND BICHROMOPHORIC COMPOUNDS WITH GEOMETRICAL ISOMERISM - STUDIES ON MODEL STRUCTURES OF BILE PIGMENTS (1979) (0)
- CONTRIBUTIONS TO THE CHEMISTRY OF PYRROLE PIGMENTS. PART 18. PYRROMETHENONES - PARTIAL STRUCTURES OF BILE PIGMENTS- STRUCTURES AND PROPERTIES IN SOLUTION (1978) (0)
- 2‐(10‐Diazo‐10H‐anthracen‐9‐ylidene)malonodinitrile: A Convenient Precursor of 9,10‐Disubstituted Anthracenes. (1995) (0)
- On the chemistry of pyrrole pigments, XXVI: the anaerobic photochemistry of bile pigments: the luminescence of bile pigment partial structures and integral pigments (1979) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 55. PHYTOCHROME MODEL STUDIES: EFFECT OF NON-CONJUGATED CHARGES ON THE 2,3-DIHYDROBILATRIENE-ABC CHROMOPHORE (1984) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. PART XX. STUDIES ON THE DEPROTONATION EQUILIBRIUM AND THE FORMATION OF METAL COMPLEXES OF PARTIAL STRUCTURES OF BILE PIGMENTS (1978) (0)
- Synthesis of N-Substituted Ureas. Part 1. N-Alkylation of Ureas. (1992) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. XXVIII. THERMAL STABILITY OF THE GEOMETRIC ISOMERS OF BILATRIENES-ABC (1980) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 61. PHYTOCHROME MODEL STUDIES: ABSORPTION SPECTRA AND STRUCTURAL ASPECTS OF 2,3-DIHYDROBILATRIENES-ABC IN VIEW OF A SEMIEMPIRICAL QUANTUM CHEMICAL TREATMENT (PPP-SCF-LCAO-MO-CI) (1985) (0)
- Chemistry of the Pyrrole Pigments. Part 67. Bilatrienes-abc and 2,3-Dihydrobilatrienes-abc in Micellar Systems. (1987) (0)
- Conformational analysis of bile pigments using force field calculations (1979) (0)
- Chemistry of Pyrrole Pigments. Part 73. Synthesis and Structure of 10-Aryl-bilatrienes-abc. (1988) (0)
- Chemistry of Pyrrole Pigments. Part 78. Properties of the b-Norbilatriene-abc-b-Nor-biladiene-ac System. (1989) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 49. PHYTOCHROME MODELS: THE THERMAL STABILITY TY OF DIASTEREOMERIC 2,3-DIHYDROBILATRIENES-ABC (1983) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 51. PHYTOCHROME MODEL STUDIES: DEPROTONATION OF 3,4-DIHYDROPYRROMETHENONES AND 2,3-DIHYDROBILATRIENES-ABC (1984) (0)
- Synthesis of N-Substituted Ureas. Part 2. Nucleophilic Substitution of Ureas at the Carbonyl Group. (1992) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. PART 44. BILE PIGMENTS AS IONOPHORES (1982) (0)
- Synthesis and Chiroptical Properties of the Tri- and Tetragalloylquinic Acids. (1996) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 52. PHYTOCHROME MODEL STUDIES: A REVERSIBLE ADDITION TO Δ-4 OF 2,3-DIHYDROBILATRIENES-ABC (1984) (0)
- ω,ω′-Urea- and -Dithioacetal-Derivatives of Hypericin. (2008) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. XXX. STRUCTURE AND PROPERTIES OF A LACTIM FORM M OF A BILATRIENE-ABC (ETIOBILIVERDIN IVΓ) (1980) (0)
- Concerning the Absorption and Photochemical Properties of an ω-4-Dimethylaminobenzal Hypericin Derivative. (2002) (0)
- Synthesis and Properties of Hypericins Substituted with Acidic and Basic Residues: Hypericin Tetrasulfonic Acid — A Water Soluble Hypericin Derivative. (1998) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 54. PHYTOCHROME MODEL STUDIES: A 2,3-DIHYDROBILATRIENE-ABC-3-CHOLESTERYL DERIVATIVE (1984) (0)
- Chemistry of Pyrrole Pigments. Part 70. Active Transport by Means of Tripyrrinic Ligands. (1987) (0)
- Synthesis and Properties of Fringelite D (1,3,4,6,8,10,11,13‐ Octahydroxy‐phenanthro(1,10,9,8,o,p,q,r,a)perylene‐7,14‐dione). (2010) (0)
- Concerning the Absorption and Emission Properties of Phenanthro(1,10,9, 8,o,p,q,r,a)perylene-7,14-dione. (1995) (0)
- Toward Hypericin‐derived Potential Photodynamic Therapy Agents ¶ (2001) (0)
- Replacement of Methoxy by tert-Butyl on a Naphthalene Residue: An Unexpected Reaction During a Snieckus ortho-Lithiation. (2002) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 59. PHYTOCHROME MODEL STUDIES: A CARBON-13 NMR CRITERION FOR TAUTOMERISM IN THE METHENE FRAGMENT (N22-N23) OF BILATRIENES-ABC AND 2,3-DIHYDROBILATRIENES-ABC (1985) (0)
- Chemistry of Pyrrole Pigments. Part 72. Phytochrome Model Studies: Synthesis of a 2,3-Dihydrobilatriene-abc Bridged Between the Pyrrolic Rings A and C by a Peptidic Moiety. (1988) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 45. PHYTOCHROME MODEL STUDIES: THE TAUTOMERIC EQUILIBRIUM BETWEEN 3,4‐DIHYDRO‐5(1H)PYRROMETHENONES AND 5(4H)DIPYRRYLMETHANONES (1983) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 53. PHYTOCHROME MODEL STUDIES: THE ACID-BASE EQUILIBRIUM OF DIASTEREOMERIC 2,3-DIHYDROBILATRIENES-ABC (1984) (0)
- Molecular and Crystal Structures of Two Diastereomeric 3,4‐Dihydropyrromethenones. (1985) (0)
- [Cerebral fat embolism in decapitation resulting from being run over by a train]. (1969) (0)
- STRUCTURE OF A BILIVERDIN APOMYOGLOBIN COMPLEX (FORM D) AT 118 K (1995) (0)
- Pyrrole Pigments. Part 76. Synthesis of Symmetrically Substituted 2,2′-Bipyrroles by Oxidative Coupling. (1988) (0)
- A formally nucleophilic substitution on bilatrienes-abc (1978) (0)
- Chemistry of Bile Pigments. Part 86. Synthesis, Structures and Properties of Bichromophoric 10-Aryl-1,19-bilindiones (1990) (0)
- On the chemistry of pyrrole pigments LXXVII: Synthesis and structure ofb-Nor-biladienes-ac andb-Nor-bilatrienes-abc, i.e., Bi-9,9?-dipyrrinonyles and Bi-9,9?-dipyrrinonylidenes, respectively (1989) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 47. TRANSPORT OF BILE PIGMENTS THROUGH MODEL BULK MEMBRANES (1983) (0)
- THE STRUCTURE OF PHOTOBILIRUBIN (1983) (0)
- On the chemistry of pyrrole pigments part 21 x ray photo electron spectrometric investigations of the n 1s level of bile pigments (1978) (0)
- Synthesis and structures of pyridinologous linear tri- and tetrapyrrole metal complexes (1995) (0)
- Efficient Routes to ω-Chloroalkyl Bilirubins and C12—N22 Bridged Biliverdins. (2001) (0)
- Chemistry of Pyrrole Pigments. Part 68. Cation Transport by Tripyrrinoid Ionophores. (1987) (0)
- Symposium-in-Print In Vitro Study of the Photocytotoxicity of Some Hypericin Analogs on Different Cell Lines (2001) (0)
- On the chemistry of pyrrole pigments, XXXVIII: On the association of bile pigments (1981) (0)
- Chemistry of Pyrrole Pigments. Part 75. Phytochrome Model Studies: Stereochemical Investigations of a 2,3-Dihydrobilatriene-abc Bridged Between the Pyrrolic Rings A and C by a Peptidic Moiety (1988) (0)
- Synthesis and Properties of Ionophore Conjugated Hypericin Derivatives. (1998) (0)
- Chemistry of Pyrrole Pigments. Part 66. Studies in Linear Dichroism. (1986) (0)
- Ozone as an Oxygen Source for Alkene Ene-Reactions. (1995) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 32. DIAGNOSTIC VALUE OF CARBON-13 NMR SPECTROSCOPY OF DIASTEREOMERIC BILATRIENES-ABC (1980) (0)
- An Efficient Route to Emodic Amine and Analogous O-Methyl Protected Derivatives Starting from Emodin. (2006) (0)
- Chemistry of Pyrrole Pigments. Part 97. Synthesis, Stereochemistry, and Solvatochromic Effects of a 1‐(Dipyrrinon‐9‐yl)‐3‐(dipyrrinon‐9‐ ylidene)‐1‐propene. (1996) (0)
- Structure and conformation of a linear pentapyrrole (1988) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 48. PHYTOCHROME MODELS: DIASTEREOMERIC 2,3-DIHYDROBILATRIENES-ABC (1983) (0)
- On the chemistry of pyrrole pigments, XIII.: The thermal stability of the geometrical isomers of arylmethylidenepyrrolinones (1976) (0)
- On the Chemistry of Pyrrole Pigments. Part 64. 2,3,7,8,12,13,17,18,22,23-Decamethyl-l,24,25,29-tetrahydro-27H-pentapyrrin-1,24-dione, the First Member of Linear Pentapyrroles: Preparation and Structure in Solution. (1986) (0)
- EFFECT OF EXTERNAL POINT CHARGES ON THE ABSORPTION SPECTRA OF BILATRIENE-ABC TYPE BILE PIGMENTS (1984) (0)
- Concerning the Reaction of 2-(10-Diazo-10H-anthracen-9-ylidene) malonodinitrile and Related Compounds with the Cryptohydride System Formic Acid-Triethylamine. (1995) (0)
- A Novel 16,24‐Dehydrobiladiene‐ab System: The Reaction of Xanthobilirubic Acid Methyl Ester with Bromine. (1995) (0)
- Reactivity of 1,1,1-Trichloroethanal (Chloral) with Pyrroles. (1989) (0)
- CONTRIBUTIONS TO THE CHEMISTRY OF PYRROLE PIGMENTS, 21: X-RAY PHOTOELECTRON SPECTROMETRIC INVESTIGATIONS OF THE N1S LEVEL OF BILE PIGMENTS (1979) (0)
- On the Chemistry of Pyrrole Pigments. Part 65. 2,3,7,8,12,13,17,18,22,23-Decamethyl-1,24,25,29-tetrahydro-27H-pentapyrrin-1,24-dione, the First Member of Linear Pentapyrroles: Properties and Reactivities. (1986) (0)
- Chemistry of Pyrrole Pigments. Part 94. 1‐(Dipyrrinon‐9‐yl)‐3‐( dipyrrinon‐9‐ylidene)‐1‐propene ‐ A Novel b‐Vinylogous Verdin Chromophore. (1996) (0)
- An Unusual Photoreaction of 3,4‐Di‐O‐benzyl‐hypericin. (2001) (0)
- CONTRIBUTIONS TO THE CHEMISTRY OF PYRROLIC PIGMENTS. XXXVII. BRIDGED BILE PIGMENTS: N21-N24-METHYLENE-BRIDGED ETIOBILIVERDIN-IV-Γ AND ETIOBILIRUBIN-IV-Γ (1981) (0)
- Chemistry of Pyrrole Pigments. Part 88. Nonlinear Optical Properties of Linear Oligopyrroles. (1993) (0)
- Regioselective Nucleophilic Addition to 2,3-Dihydrobilatrienes-abc. (1986) (0)
- Force field calculations on linear oligopyrroles: 2,2?-bipyrrole, 2,2?-furylpyrrole and prodigiosene (short communication): Kurze Mitteilung (1988) (0)
- CONTRIBUTIONS TO THE CHEMISTRY OF PYRROLE PIGMENTS. PART 39. FORCE FIELD MODEL FOR THE CONFORMATIONAL ANALYTICAL STUDY OF BILE PIGMENTS (1981) (0)
- A NOVEL SYNTHESIS OF C2ν-SYMMETRICALLY SUBSTITUTED A,B,C-BILATRIENES (1978) (0)
- Investigations on the stereochemistry of hypericin (2008) (0)
- On the chemistry of pyrrole pigments, XII.: The problem of conformational dependence on partial dipole moments in 5-arylmethylidene-3-pyrroline-2-ones (1976) (0)
- A Carbohydrate-Linked Hypericinic Photosensitizing Agent. (2009) (0)
- REPORT ON THE CHEMISTRY OF PYRROLE PIGMENTS, PART 16. THE 5-(5-METHYLIDENE(5H-PYRROLYL-2-METHYLIDENE))-3-PYRROLIN-2-ONE - A PARTIAL STRUCTURE OF BILE PIGMENTS (1977) (0)
- ω,ω′‐Appended Nucleo‐Base Derivatives of Hypericin. (2008) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 56. PHYTOCHROME MODEL STUDIES: INDUCED AND NATURAL CHIROOPTICAL PROPERTIES OF BILATRIENES-ABC AND 2,3-DIHYDROBILATRIENES-ABC (1984) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 50. PHYTOCHROME MODEL STUDIES: THE LACTAM-LACTIM EQUILIBRIUM OF THE PYRROLIDINONE FRAGMENT OF 2,3-DIHYDROBILATRIENES-ABC - PROTONATION EQUILIBRIUMS (1983) (0)
- Preparation and NMR Spectroscopy of (Ag2(μ-CH2(PPh2)2)3) (O3SCF3)2, a Disilver(I) Complex with Three Bridging CH2(PPh2)2 Ligands. (1988) (0)
- MECHANISM OF THE PHOTOCHEMICAL (Z) ⇄ (E) ISOMERIZATION OF BILE PIGMENT PARTIAL STRUCTURES (1978) (0)
- Intramolecularly Friedel—Crafts Acylated Emodin Derivatives. An Access to the Cores of Angucyclinones, Anthracyclinones, and to Hypericin Analogues. (2005) (0)
- Chemistry of Pyrrole Pigments. Part 74. Control of the Diastereomeric and Conformational Equilibria of Bilatrienes-abc by 10-Heteroaryl Substituents with Hydrogen Bonding Acceptor and Donor Functions. (1988) (0)
- Synthesis and Properties of Unique Mesoionic 1,3-Thiazolium-4-olates. (1997) (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 63. PHYTOCHROME MODEL STUDIES: THE SYSTEM 2,3-DIHYDROBILATRIENE-HEXAMETHYLPHOSPHORIC ACID TRIAMIDE AS A MODEL FOR STRETCHED CHROMOPHORES (1985) (0)
- 1 , 2-bis-Dipyrrinon-9-yl-ethene-a Novel b-homo-Verdin Chromophore : the Reaction of 9-Methyl-10 H-dipyrrin-l-ones with Bromine (0)
- CHEMISTRY OF PYRROLE PIGMENTS. 62. PHYTOCHROME MODEL STUDIES: THE CONFORMATIONAL INFLUENCE OF STERIC AND DIPOLAR EFFECTS ON 2,3-DIHYDROBILATRIENE-ABC DERIVATIVES (1985) (0)
- CONTRIBUTION TO THE CHEMISTRY OF PYRROLE PIGMENTS, XIX‐ THE ELECTROCHEMICAL OXIDATION OF PYRROMETHENONES AND PYRROMETHENES (BILE PIGMENT PARTIAL STRUCTURES) (1978) (0)
- An Efficient Synthesis of O-Methyl Protected Emodin Aldehyde and Emodin Nitrile. (2003) (0)
- On the chemistry of pyrrole pigments, XL: azafulvenes, key intermediates in pyrrole pigment synthesis??A new synthesis of verdinoid and rubinoid bile pigments (1981) (0)
- PHENOMENON OF INDUCED OPTICAL ACTIVITY: INDUCED CIRCULAR DICHROISM IN MIXTURE SERIES (1984) (0)
- 1,2-Bis(dipyrrinon-9-yl)ethene - a Novel b-homo-Verdin Chromophore: The Reaction of 9-Methyl-10H-dipyrrin-1-ones with Bromine. (1996) (0)
- From the Photosensitizer Hypericin to the Photoreceptor Stentorin — The Chemistry of Phenanthroperylene Quinones (2000) (0)
- Austria 2-( 10-Diazo-10 H-anthracen-9-ylidene )-malonodinitrile : A Convenient Precursor of 9 , 10-Disubstituted Anthracenes # (0)
- Synthesis of 6‐Heterocyclically Appended Tri‐O‐methyl Protected 6‐Desmethyl Emodin Derivatives. (2004) (0)
- On the chemistry of pyrrole pigments, XIV.: Interconversion processes of arylmethylidenepyrrolinones?a special case of atropisomerism in sterically hindered styrenes (1976) (0)
- Structures of (Z)-3,4-diethyl-5-(phenylmethylene)-3-pyrrolin-2-one, C15H17NO (I), and (Z)(syn)-3,4-dimethyl-5-(2-pyridylmethylene)-3-pyrrolin-2-one, C12H12N2O (II) (1984) (0)
This paper list is powered by the following services:
Other Resources About Heinz Falk
What Schools Are Affiliated With Heinz Falk?
Heinz Falk is affiliated with the following schools:
