Works matching IS 0022152X AND DT 1991 AND VI 28 AND IP 8
Results: 48
Synthesis of 4-hydroxy-3-triftuoromethylpyrazoles.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1971, doi. 10.1002/jhet.5570280830
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Total assignment of the <sup>1</sup>H and <sup>13</sup>C NMR spectra of benzo[ f][1]benzothieno[2,3- c]quinoline by inverse-detected two-dimensional NMR techniques.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2035, doi. 10.1002/jhet.5570280841
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Reactions 1-acetyl-3-oxo-2,3-dihydroindole with alkyl 2-cyano-3-alkoxypropenoate and alkyl 2-alkoxycarbonyl-3-alkoxy-propenoate. Synthesis of 9-acetoxypyrrolo[1,2- a]indol-3-one derivatives.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1869, doi. 10.1002/jhet.5570280812
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Diels-alder reaction of ( E)-4-(2-nitroethenyl)-1 H-imidazoles and methyl ( E)-3-(1-imidazol-4-yl)propenoates.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1941, doi. 10.1002/jhet.5570280823
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Ground state vs. transition state substituent effects on reactions of aziridinium salts.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1993, doi. 10.1002/jhet.5570280834
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Selective N-1 alkylation of unsymmetrically substituted pyrazoles.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1837, doi. 10.1002/jhet.5570280805
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The base-promoted dehydration of rac.- trans-tetrahydro-6-hydroxy-4-[(2-(dimethylamino)ethyl]-7-(4-methoxyphenyl)-1,4-thiazepin-5(2 H)-one.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2051, doi. 10.1002/jhet.5570280845
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Novel heterocyclization of 4-phenylthiosemicarbazones and related compounds with chlorocarbonylsulfenyl chloride.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1957, doi. 10.1002/jhet.5570280827
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Hydroxyindole intermediates in the process of melanogenesis: A mass spectrometric study.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2021, doi. 10.1002/jhet.5570280838
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Double 1,3-dipolar cycloadditions of meso-ionic heterocycles to N-substituted maleimides.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1853, doi. 10.1002/jhet.5570280809
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Photochemistry of alkenyl- and acetal-substituted pyridines.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2061, doi. 10.1002/jhet.5570280849
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A facile and novel synthesis of 5-phenylimidazo[4,5- c][1,8]naphthyridin-4(5 H)-ones.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2029, doi. 10.1002/jhet.5570280840
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The parent of 2-(4,5-dihydro-1 H-tetrazol-5-ylidene)-2-cyanoacetate: Synthesis and reactivity X-ray structure of (E)2-[1-(2,2-dimethylpropyl)-4,5-dihydro-1 H-tetrazol-5-ylidene]-2-cyanoacetate.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1863, doi. 10.1002/jhet.5570280811
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A simple synthesis of 2(3 H)-benzoxazolones using phenyl chloroformate.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1937, doi. 10.1002/jhet.5570280822
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The fragmentation behavior of differently substituted 2-amino-1,3,4-benzotriazepines.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1987, doi. 10.1002/jhet.5570280833
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Fused s-triazino heterocycles. XVIII. 1,3,4,7,11c-Pentaazabenz[ de]anthracene and 1,3,4,6,7,11c-hexaazabenz[ de]anthracene. Two new ring systems.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1835, doi. 10.1002/jhet.5570280804
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An improved synthesis of 3,6-diamino-1,2,4,5-tetrazine. II. From triaminoguanidine and 2,4-pentanedione.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2049, doi. 10.1002/jhet.5570280844
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Synthesis, crystal structure determination and pharmacological activity of 7,8,3′,4′-tetramethoxyisoflavone.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1885, doi. 10.1002/jhet.5570280815
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Synthesis of 7-ethyl-4,7-dihydro-4-oxo-2-(4-pyridinyl)thieno[2,3- b]pyridine-5-carboxylic acid.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1953, doi. 10.1002/jhet.5570280826
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A convenient synthesis of (2-styrylchromon-8-yl)acetic acids.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2013, doi. 10.1002/jhet.5570280837
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A facile synthesis of pyrazole-5-sulfonamide derivatives.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1849, doi. 10.1002/jhet.5570280808
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Reaction of tris(alkylthio)cyclopropenyl cations with 2-pyridylmagnesium bromide as a new route to indolizines.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2059, doi. 10.1002/jhet.5570280848
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Synthesis and properties of 5-(1,2-dihaloethyl)-2′-deoxyuridines and related analogues.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1917, doi. 10.1002/jhet.5570280819
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A simple aza wittig-mediated pyrimidine annulation reaction.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1857, doi. 10.1002/jhet.5570280810
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Total assignment of the proton and carbon NMR spectra of the alkaloid quindoline - utilization of HMQC-TOCSY to indirectly establish protonated carbon-protonated carbon connectivities.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2065, doi. 10.1002/jhet.5570280850
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Action of (2-benzothiazolyl)methyllithium with organic polar functions.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1933, doi. 10.1002/jhet.5570280821
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Inhibition of human dihydrofolate reductase by 2,4-diaminoquinazolines bearing simple substituents on the aromatic ring.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1981, doi. 10.1002/jhet.5570280832
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Preparation of 3-(2 H-pyran-2-on-6-yl)indolizines and the diels-alder reactions with some olefinic and acetylenic dienophiles.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1831, doi. 10.1002/jhet.5570280803
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Synthesis of (1 R,4 S,5 R)- endo-N,N-dimethyl-2-azabicyclo[2.2.1]methanamine.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2045, doi. 10.1002/jhet.5570280843
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Réarrangement de thiénobenzothiépinones en thiénoisothiazolinone et benzoisothiazolinone.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1881, doi. 10.1002/jhet.5570280814
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A phenolic glycoside from artemisia sacrorum.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1949, doi. 10.1002/jhet.5570280825
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2-Aryl-substituted 4 H-3,1-benzoxazin-4-ones as novel active substances for the cardiovascular system.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2005, doi. 10.1002/jhet.5570280836
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Heterocycles. XXVI.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1845, doi. 10.1002/jhet.5570280807
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Preferred conformations of some 2-pyridyl substituted thiourea derivatives. A reinvestigation of NMR spectral data.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2057, doi. 10.1002/jhet.5570280847
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A convenient route to diazepines by intramolecular cyclisation of carbonylazides.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1911, doi. 10.1002/jhet.5570280818
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An entry into the novel tetracyclic system 6 H-pyrido[1′,2′:4,5]pyrazino[1,2- a]benzimidazole. Synthesis and conformational study of the 1,2,3,4,13,13a-hexahydro-3,3-ethylenedioxy and 3-ketone derivatives.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1965, doi. 10.1002/jhet.5570280829
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Synthesis of novel indolizine derivatives.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1927, doi. 10.1002/jhet.5570280820
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Synthesis of 1,8-, 1,6- and 3,6-dichloro-9 H-thioxanthen-9-ones.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1977, doi. 10.1002/jhet.5570280831
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The synthesis of novel polycyclic heterocyclic ring systems via photocyclization. 5.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1825, doi. 10.1002/jhet.5570280802
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An unusual reaction at C-3 of 4-methoxy-6-methyl-2-pyrone.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2041, doi. 10.1002/jhet.5570280842
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Reactions of 3-oxo-2,3-dihydrobenzofuran with alkyl 2-cyano-3-alkoxypropenoate and alkyl 2-alkoxycarbonyl-3-alkoxypropenoate. Synthesis of pyran derivatives.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1875, doi. 10.1002/jhet.5570280813
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On the synthesis of geminally functionalized heterocyclic aminocarboxylic acid esters.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1945, doi. 10.1002/jhet.5570280824
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The synthesis of novel polycyclic heterocyclic ring systems via photocyclization. 6. Naphthothienonaphthyridines.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1997, doi. 10.1002/jhet.5570280835
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Studies on the constituents of bocconia cordata. IV.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1841, doi. 10.1002/jhet.5570280806
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Preparation of 2-formyl-4-nitropyrroles.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2053, doi. 10.1002/jhet.5570280846
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Pyrimidine derivatives. VI.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1901, doi. 10.1002/jhet.5570280817
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The structure of β-heteroaryl-α,β-dehydro-α-amino acid derivatives, intermediates in the synthesis of fused pyran-2-ones. Substituted methyl ( Z)-2-benzoylamino-3-(5-oxopyrazolinyl-4)propenoates.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 1961, doi. 10.1002/jhet.5570280828
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Synthesis of 2-guanyl-4-(3-substituted-phenyl)thiazoles with potent histamine H<sub>2</sub>-antagonism activity.
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- Journal of Heterocyclic Chemistry, 1991, v. 28, n. 8, p. 2025, doi. 10.1002/jhet.5570280839
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