Showing papers in "Journal of Heterocyclic Chemistry in 1980"

TL;DR: In this paper, the postulated routes to formation of 2-amino-4-methyl-5-arylazothiazoles (XII) from 3-thiocyanate were given.

TL;DR: The pendant amino and mercapto groups on 4-amino-3-mercapto-4-H-4H-1,2,4-triazoles can be cyclized by phenylpropargyl aldehydes as discussed by the authors.

TL;DR: In this article, the reaction of aliphatic, aromatic and heterocyclic nitriles with a variety of ortho aminocarbonyl derivatives, such as amides, esters and ketones of benzene, thiophen, furan, pyrrole, benzothiophene and pyridothiophen have been found to yield the corresponding condensed pyrimidines in fair to good yields.

TL;DR: All isomers of the parent phenanthro[b]thiophenes, namely, phenanthropo[1,2b] thiophene as mentioned in this paper, have been synthesized.

TL;DR: The n-butylation and N-benzylation of nine pyrazoles bearing different substituents in positions 3 and 5 have been studied in neutral and basic medium (phase transfert catalysis) as discussed by the authors.

TL;DR: In this paper, a series ofazaannulenes formed from a β-diketone and an aromatic diamine in the presence of nickel(II) have been synthesized.

TL;DR: In this article, the authors showed that the marked influence of an electron withdrawing 3-substituent in 5 is demonstrated by the fluorescence spectra of 7a,b (synthesized from 2d,e and ethyl 3-oxobutyrate), whose maxima are sharply shifted to the blue as compared with compounds 21-r.

TL;DR: In this paper, a synthetic route for the preparation of covalently linked prophyin-quinone and metalloporphyrin-inone complexes as models for the phototrap in bacterial photosynthesis is described.

TL;DR: The Bischler-Napieralski dihydroisoquinoline synthesis was proven to occur via imidoyl chlorides and the corresponding nitrilium salt as discussed by the authors.

TL;DR: In this paper, C(α),O-Dilithiooximes and N-dilithiophenylhydrazones were prepared using an excess of lithium diisopropylamide (1:3).

TL;DR: In this article, the potent antitumor benzo[c]phenanthridine alkaloids nitidine and fagaronine were synthesized as analogs of the potent antimalarial benzo [c] phenanthridines.

TL;DR: The four o-aminoformylquinolines substituted on the pyridine ring were synthesized from the corresponding aminoquinoline-carboxylic acids.

TL;DR: In this article, the Smiles rearrangement was used to synthesize substituted 1-nitrophenothiazines in situ, which involves condensation of 3-chloro or methyl-2-aminobenzenethiol with o-halonitrobenzenes.

TL;DR: In this paper, the synthesis of the previously unknown 11H-1,2,4-triazolo[4,3-b]pyridazino [4,5b]indoles from 2-indole carbohydrazide was described.

TL;DR: The reaction of 3-hydrazino-1,2,4-triazino[5,6b]indole with nitrous acid affords a novel tetracyclic ring system.

TL;DR: In this paper, the synthesis of derivatives of 1,4,6-benzo[b]triazaphenothiazine, a novel aza-analog of phenothiazines, is described.

TL;DR: In this article, the reaction of 3-oxo-1,2-benzoisothiazoline-2-acetamide 1,1-dioxides (1a-f) with alkaline alkoxides was carried out under various conditions.

TL;DR: A series of 2-substituted 4H-3,1-benzoxazinones and 2,3-disubstitized 4-(3H)quinazolinones have been synthesized in mild conditions by the use of triphenyl phosphite and pyridine as cyclising medium as mentioned in this paper.

TL;DR: The reaction of anthranilonitrile with 2-chloroethyl isocyanate yields 2-[3-(2-chlorosureido]benzo-nitrile (6) which, upon heating, or treatment with base, undergoes a double cyclization to form 2,6-dihydroimidazo[1,2-c]quinazolin-5-(3H) one (8) in excellent yield as discussed by the authors.

TL;DR: In this paper, the carbon-13 resonances of six 1,4-benzodiazepines were assigned based on chemical shift theory and on the analysis of the fine splittings caused by one bond and long range couplings.

TL;DR: A series of 3-substituted aminoimidazo[1,5a]pyridine derivatives have been synthesized by cyclodesulfurization of a variety of N-(2-pyridylmethyl)thioureas with dicyclohexylcarbodiimide (DCCD) as discussed by the authors.

TL;DR: Several 1-(5-aryl-2H-tetrazol-2-ylacetyl)-4-substituted thiosemicarbazides and 5-5-yl-methyl-2.5-triazole-3-thiols were synthesized as possible antiinflammatory agents.

TL;DR: In this paper, the copper salt-catalyzed interaction of ethyl diazopyruvate with ketones, aldehydes and nitriles was examined, and a variety of 1,3-dioxoles and oxazoles were obtained in moderate yield.

TL;DR: In this article, the geometrical isomers of phenylhydrazones II-Z and II-E have been characterized by uv-visible, ir, and nmr spectra.

TL;DR: In this paper, 3-Amino-1,2,4-triazoles and 2-aminobenzimidazole were reacted with N-cyanoimidates to give 5-amino-1.2, 4.5triazolo, 5-azaadenines, and 4-aminomethylbenzimidazo, respectively.

TL;DR: In this paper, a new seven step synthesis of methoxalen, 9-methoxy-7H-furo[3,2g][1]benzopyran-7-one, starting from 2-chloro-2′-hydroxy-3′,4′-dimethoxyacetophenone is described.

TL;DR: Isatin has been condensed with a series of cyclic ketones to give 3-substituted-3-hydroxyoxindoles as potential anticonvulsant agents as discussed by the authors.