Showing papers in "Journal of Heterocyclic Chemistry in 1970"

TL;DR: In this article, the bromination of 2,1,3-benzothiadiazoles in 47% hydrobromic acid at elevated temperature has led to a general preparative method for the synthesis in high yield of otherwise difficulty accessible brominated 2, 1, 3-benziadiazole.

TL;DR: In this article, the reaction between pyrroles and benzaldehyde in refluxing acetic acid gives meso-tetraphenylporphins and chlorins.

TL;DR: In this paper, a general synthesis of 1,2,4-triazines from 3-methylthiotriazines is described, and it has been shown that 1 2,4 triazines undergo covalent hydration across the N4-C5 bond.

TL;DR: In this article, the synthesis of 7,8-dimethyl, 2,4-dioxo-10-ribityl-2,3,4,10-tetrahydropyrimido[4,5-b]quinoline (10-deazariboflavin) was described.

TL;DR: In this article, NMR spectral data are reported for various 4-substituted thieno[2,3-b]pyridine compounds for screening as potential antimalarial drugs.

TL;DR: The isomerization of s-triazolo[4,3-a]pyridines into s-Triazolo [1,5-a]-pyridine ring is greatly facilitated by electron withdrawing nitro substituents in the pyridine rings and retarded by electron donating amino groups as mentioned in this paper.

TL;DR: In this article, it was shown that 3-acetyl-amino-II (IIb) and 2-acetylamino-I (Ic) can be converted to dipyrido[2,3-b:2′,3′,2′-d]thiophene (V) and dipyride[2.5]-pyridine (VI), respectively.

TL;DR: In this article, the structure of 4-hydroxy-6-methyl-2-pyridone formed by the reaction of 6-methyl 2Hpyran-2,4(3H)-dione and ammonia is characterized.

TL;DR: In this article, the reaction of 4-Dicyanomethylene-4H-pyrans with secondary amines gave copyrine and iminopyridone derivatives.

TL;DR: In the 1H nmr spectra, this paperusion of 2,4-bis(trimethylsilyloxy)pyridine with 2,3,5-tri-O-benzoyl-β-D-ribofuranosyl-2-pyridone (3-deazauracil arabinoside) gave 4-amino-1-β,D-arabinofurano-yl-poly(2)-poly(3)-pyride (3)-deazacytosine

TL;DR: Substituted carboxamide hydrazones have been condensed with 2,3-butanedione and with glyoxal to form 1,2,4-triazines as mentioned in this paper.

TL;DR: In this paper, 2-phenyl-5-(trichloromethyl)-1,3,4-oxadiazoles (VIa-f, VIII-X) was shown to be active against Plasmodium berghei in mice when administered in single 160 or 640 mg/kg.

TL;DR: In this paper, a review of synthetic approaches to, and the chemistry of, phospholes, benzophospholes and dibenzophosphorus is presented, with particular attention paid to the possible aromatic character of the phosphole ring.

TL;DR: The synthesis of a series of N-glycosyl-v-triazoles has been accomplished by the 1,3-dipolar cycloaddition of several glycosyl azides to methyl propiolate and propiolic acid.

TL;DR: In this paper, the polarographic reduction potentials of mono and diaza compounds were measured in acetonitrile solution and the reduction mechanism investigated by oscillopolarography and the Kouleckys analysis of the waves.

TL;DR: The ribosylation of several silylated pyrrolo[2,3-d]pyrimidines by the Wittenberg procedure has produced 1,3 and 7-ribosylpyrrol o[2.3d]-pyrimidine derivatives in high yield as mentioned in this paper.

TL;DR: In this paper, a general synthetic approach to the yet unknown class of 1-vinyl-1,2,3-triazoles is described, which is the condensation of active methylene compounds with vinyl azides or their precursors, the β-haloalkyl azides, in the presence of an alkoxide.

TL;DR: The boron trifluoride catalyzed 1,4-addition of 2,3-dihydro-5-methylfuran to N-(p-methoxybenzylidene)-5-indanamine (VI) gave 2 pairs of epimers, dl-3,3a,4,5,7,8,9,10b-octahydro,4-(pmethoxyphenyl)-10c-methyl-2H-cyclopenta[f]furo[3,

TL;DR: The reaction of α-chlorosubstituted acyl halides with indole, in the presence of pyridine constitutes a convenient synthesis of 3-chloroacylindoles.

TL;DR: Ketone semicarbazones react with two moles of phosphorus oxychloride-dimethylformamide with the formation of 3-substituted pyrazole-4-carboxaldehydes as discussed by the authors.

TL;DR: In this article, the 1,4-dianions of N,N-diphenylsemicarbazone, para-substituted acetophenone, deoxybenzoin and dibenzyl ketone phenylhydrazone were prepared by treatment of the respective compounds with two molecular equivalents of n-butyllithium in tetrahydrofuranhexane at 0° and condensed with a variety of aromatic esters, followed by acid cyclization to give the substituted pyrazole in good yield.

TL;DR: In this article, the ultraviolet spectra of pyridyl- and quinolyl- substituted 2-aminothiazoles were recorded, and they were shown to possess pyride substituents in 4-and 5-positions on the thiazole ring.

TL;DR: In this article, the authors describe the direct insertion of a sulfur bridging atom into an aromatic molecule, such as phenanthrene (XVII) and its sulfoxide and sulfone.

TL;DR: The synthesis of 7-methylpyrazolo[4,3-d]-v-triazin-4-one (6), a derivative of the new ring system, has been accomplished by a diazotization reaction as mentioned in this paper.