Journal ArticleDOI
Diazaindenes (azaindoles.) Part V. Synthesis, spectra, and tautomerism of 1,5-diazainden-4(5H)-one, 1,4- and 1,6-diazainden-2(3H)-one, and some 3-substituted derivatives
TLDR
In this paper, 1.5-Diazaindene 5-oxide has been prepared and rearranged, giving 1-acetyl-1,5-diazainden-4(5H)-one (1).Abstract:
1,5-Diazaindene 5-oxide has been prepared and rearranged, giving 1-acetyl-1,5-diazainden-4(5H)-one (1). Compound (1) has also been obtained from either (a)cis-3-(pyrrol-2-yl)acrylic acid or (b) 1,5-oxazainden-4(5H)-one. 1,4- and 1,6-Diazainden-2(3H)-one and some 3-substituted derivatives have been synthesised from the corresponding chloronitropyridines. Spectra show that the location of the nitrogen atom in the pyridine ring and the type of 3-substituent markedly influence the position of tautomeric equilibrium.read more
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Journal ArticleDOI
Nitropyridines, their synthesis and reactions
TL;DR: In this article, the vicarious nucleophilic substitution (VNS) method with ammonia and amines and by the oxidative substitution method in the position para to the nitro group were used to synthesize 2-substituted-5-nitropyridines.
Journal ArticleDOI
Thiazoles polycycliques. I. Substitution par les nucléophiles anioniques des dérivés 2‐méthylsulfonylés de la thiazolo[5,4‐b]‐pyridine et du benzothiazole
TL;DR: In this article, the substitution reactions of 2-methylsulfonyl thiazolo[5,4-b]-pyridine (3) by nucleophilic anionic reagents were studied.
Book ChapterDOI
Bicyclic 5-6 Systems: Two Heteroatoms 1:1
TL;DR: In this article, bicyclic ring systems that consist of a five-and a six-membered ring with each ring containing one heteroatom that is not situated at a ring junction position are covered.
Journal ArticleDOI
Preparation of 6-azaoxindole (6-azaindol-2(3H)-one) and substituted derivatives
Einar J. Andreassen,Jan M. Bakke +1 more
TL;DR: A general synthesis of 6-azaoxindoles, substituted in the 3-and 5-position, has been developed starting from 4-methoxycarbomethyl-3-nitropyridine, via hydrogenation of the nitro group and cyclisation of the resulting 3-amino-4-mETHoxycarbometric-pyridine.