Works matching IS 0022152X AND DT 1999 AND VI 36 AND IP 4
Results: 48
An unexpected result in the condensation of 2-amino-6-bromopyridine with ethyl 4-chloroacetoacetate: Four dihalo-substituted pyrido[1,2- a]pyrimidin-4-ones as reaction products.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1065, doi. 10.1002/jhet.5570360438
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Synthesis, crystal structure and spectroscopic studies of 3-hydrazono- and 3-hydroxyiminoquinolin-2-ones.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 881, doi. 10.1002/jhet.5570360409
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Optimization of long-range <sup>1</sup>H-<sup>15</sup>N 2D NMR experiments at natural abundance -- Assignment of the <sup>15</sup>N resonances of cryptospirolepine at the submilligram level.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1115, doi. 10.1002/jhet.5570360449
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X-ray crystallographic and NMR structural studies of trans-2,3-dichloro-5-ethyl-2,3-dihydrothieno[2 3- b]pyridine syn-1-oxide reactions of thiophene rings with hypochlorite reagents.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1077, doi. 10.1002/jhet.5570360440
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Synthesis and fluorescence properties of novel benzo[ a]phenoxazin-5-one derivatives.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 895, doi. 10.1002/jhet.5570360411
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8-Methyl-7-substituted-1,6-naphthyridine-3-carboxylic acids as New 6-desfluoroquinolone antibacterials.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 953, doi. 10.1002/jhet.5570360422
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A new synthesis of symmetrical 2,5-disubstituted 1,3,4-oxadiazoles.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1029, doi. 10.1002/jhet.5570360433
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Successive electron transfer reaction of the lithium salt of 5-methyl-5,10-dihydrophenazine anion with 4-nitrophenethyl bromide via 4-nitrostyrene.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 849, doi. 10.1002/jhet.5570360404
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Microwave synthesis and anticonvulsant activity of 2-benzyl-1(2 H)-phthalazinones.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1095, doi. 10.1002/jhet.5570360444
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A convenient synthesis of 4-trifluoromethyl-4 H-[1,5,2]dioxazines and 4-trifluoromethyl-6 H-[1,2,5]oxadiazines.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 917, doi. 10.1002/jhet.5570360415
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Pyridazine derivatives. XIX: Functionalization studies at the 5 position in the 6-phenyl-3(2 H)-pyridazinone system.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 985, doi. 10.1002/jhet.5570360426
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Hydrobromic acid-dimethyl sulfoxide reagent for dealkylation of 5,10-dialkyl-5,10-dihydrophenazines: Synthesis of 10-alkyl-2(10 H)-phenazinones.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1057, doi. 10.1002/jhet.5570360437
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Investigation of the reaction of N-substituted indolylborates: Palladium catalyzed cross-coupling reactions and intramolecular alkyl migration reactions.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 873, doi. 10.1002/jhet.5570360408
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Characterization of a trace by-product of the synthesis of the protease inhibitor tipranavir (PNU-140690).
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1107, doi. 10.1002/jhet.5570360448
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Synthesis and complete <sup>1</sup> H and <sup>13</sup>C assignments of thiazolo[3,2- a]quinolinium derivatives.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 937, doi. 10.1002/jhet.5570360419
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Quaternization and dequaternization of pyrazoles in solvent-free conditions: Conventional heating versus microwave irradiation.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 889, doi. 10.1002/jhet.5570360410
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New indolium and quinolinium dyes sensitive to aqueous halide ions at physiological concentrations.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 949, doi. 10.1002/jhet.5570360421
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6,16-methano-6 H,16 H-[2,4]benzothiazepino[3,4- d][1,3,5]benzoxadiazocine and 6,26:13,19-dimethano-6 H,9 H,13 H,19 H,22 H,26 H-benzo[1″,2″:5,6;4″,5″:5′,6′]bis[1,3]thiazepino[2,3- d:2′,3′- d]bis[1,3,5]-benzoxadiazocine: New heterocyclic systems
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1023, doi. 10.1002/jhet.5570360432
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Structure and properties of ethyl (2-benzimidazolyl)cyanoacetimidate.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 841, doi. 10.1002/jhet.5570360403
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Molecular structure and electronic spectrum of taspine: Semiempirical calculations.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1091, doi. 10.1002/jhet.5570360443
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Reactions of arylglyoxals with tetrasulfur tetranitrides (S<sub>4</sub>N<sub>4</sub>): Formation of 2-aroyl-5-arylimidazoles and 2-aroyl-5-aryloxazoles.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 911, doi. 10.1002/jhet.5570360414
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1,6- and 1,7-naphthyridines. II. Synthesis from acyclic precursors.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 979, doi. 10.1002/jhet.5570360425
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Structural identification of a novel degradant of the antibiotic pirlimycin formed under thermal stress conditions.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1049, doi. 10.1002/jhet.5570360436
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1,3,5-tripyridylbenzenes via threefold stille couplings.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 869, doi. 10.1002/jhet.5570360407
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A new efficient route to 3-vinylthiophene.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1105, doi. 10.1002/jhet.5570360447
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Synthesis of 2-aryl-2,3-dihydro-4-styrylpyrimidodiazepines in the reaction of 4,5,6-triaminopyrimidine and 2,4,5,6-tetraaminopyrimidine with diarylidenacetones.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 933, doi. 10.1002/jhet.5570360418
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Syntheses and reactions of 2,2′-bisbenzimidazole systems.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1001, doi. 10.1002/jhet.5570360429
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Electrochemical and electron spin resonance studies of selected benzazolo[3,2- a]quinolinium salts.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 943, doi. 10.1002/jhet.5570360420
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Synthesis of piperidine analogs of 1-(3-chlorophenyl)piperazine, a well known serotonin ligand.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1017, doi. 10.1002/jhet.5570360431
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Haloacetylated enol ethers. 14 [6]. Reaction of β-alkoxyvinyl trifluoromethyl ketones with N-methylhydroxylamine.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 837, doi. 10.1002/jhet.5570360402
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Synthesis of spiropyrazolines via 1,3-dipolar cycloaddition of nitrilimines.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1087, doi. 10.1002/jhet.5570360442
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Direct functionalization of 4,5-dichloropyridazin-6-one.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 905, doi. 10.1002/jhet.5570360413
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Synthesis and conformational analysis of a chiral fluorinated bilirubin analog lacking carboxyl groups.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 969, doi. 10.1002/jhet.5570360424
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Separation, structural determination and biological evaluation of the thymidylate synthase inhibitor 3,3-Di-(4′-hydroxyphenyl)-6(7)-chloro-1-oxo-1 H,3 H-naphtho[1,8- cd]pyran.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1043, doi. 10.1002/jhet.5570360435
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On the reaction of 3-nitro-1,2-phenylenediamine with ethyl acetoacetate. Condensed dihydrodiazepinones.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1013, doi. 10.1002/jhet.5570360430
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Synthesis of 3-phenoxy-1,3-dihydro-1-isobenzofuranones by palladium-catalyzed carbonylative cyclization of 2-bromobenzaldehyde with phenols.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1101, doi. 10.1002/jhet.5570360446
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Polycyclic fused phenanthridines: An alternative approach from benzotriazoles.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 927, doi. 10.1002/jhet.5570360417
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Studies on pyrrolidinones. Synthesis of 1,2,3,5,11,11a-hexahydroindolizino[7,6- b]indole-3,11-dione.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 997, doi. 10.1002/jhet.5570360428
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On the reaction of meldrum's acid with N-trimethylsilylanilines substituted by electron withdrawing groups.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1073, doi. 10.1002/jhet.5570360439
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Photochemistry of mesoionic compounds. Photochemical conversion of 5-azido-1,3-diaryltetrazolium salts to novel tricyclic mesoions with a tetrazolo[1,5- a]benzimidazole skeleton.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 863, doi. 10.1002/jhet.5570360406
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Synthesis of oxidized 1,2,3-thiadiazines by hydroperoxy-induced ring enlargement of 2-benzenesulfonylaminoisothiazolium salts.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1081, doi. 10.1002/jhet.5570360441
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Selenium heterocycles. XLIII. Syntheses of 3,5-Diaryl-1,2,4-thiadiazoles and 3,5-Diaryl-1,2,4-selenadiazoles.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 901, doi. 10.1002/jhet.5570360412
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Cycloadditions of adamantanethione S-methylide to CC multiple bonds.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 959, doi. 10.1002/jhet.5570360423
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Thioamide derivatives of cannabinoids. A study of the influence of the thioamide function on regiochemistry in the synthesis of thioamide cannabinoids from 2,4-dihydroxybenzothioamides.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1033, doi. 10.1002/jhet.5570360434
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Synthesis of pyrido[3,2- e]pyrrolo[2,1- c][1,2,4]triazines from pyrido[3,2- e][1,2,4]triazine derivatives.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 857, doi. 10.1002/jhet.5570360405
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A convenient method for the synthesis of six-membered heterocyclic enaminones.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 1097, doi. 10.1002/jhet.5570360445
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Synthesis of 2′-[2-(5-benzyloxyindolyl)]propylamine derivatives.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 921, doi. 10.1002/jhet.5570360416
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Intramolecular oxidative cyclizations in heteroarylthioureas: A versatile pathway to bridgehead heterocyclic systems.
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- Journal of Heterocyclic Chemistry, 1999, v. 36, n. 4, p. 991, doi. 10.1002/jhet.5570360427
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