Journal ArticleDOI
Thia-1 aza-3 butadienes substitues: action du cetene et derives
TLDR
In this paper, the electrophilic properties of 6H-1,3-thiazine 6-ones were described via a general (4 + 2) cycloaddition reaction, which gave rise to other reaction products resulting from the addition of two or three molecules of ketene according to the nature of the substituents.Abstract:
Novel, diversely substituted 1-thia 3-aza butadienes have been prepared and reacted with ketene or its derivatives. Via a general (4 + 2) cycloaddition reaction, they afford functionalised 6H-1,3-thiazine 6-ones, the electrophilic properties of which are described. This cycloaddition gives rise to other reaction products resulting from the addition of two or three molecules of ketene according to the nature of the substituents.read more
Citations
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Journal ArticleDOI
Synthesis of 6-imino-6h-1,3-thiazines
TL;DR: In this article, the reaction of several substituted acrylonitriles with arylthioamides in acetic acid in the presence of perchloric acid yielding 2,4,5-trisubstituted 6-imino-6H-1,3-thiazine perchlorates 3a-3h is described.
Journal ArticleDOI
Selective Synthesis of Substituted 6H-1,3-Thiazines
TL;DR: In this paper, cyclocondensation reactions under high pressure between methylacrylate and 2-substitutes 1-thia 3-aza 4-aminobutadienes leads selectively to 5-methoxycarbonyl 6H-1,3-thiazines.
Journal ArticleDOI
Novel synthesis of benzimidazole by Ring Contraction Rearrangement of benzodiazepine
TL;DR: In this article, N'-thioacylamidines were used to synthesize substituted aromatic ketones (acetophenone) and substituted aldehydes, which react with o-phenylenediamine to give benzimidazole derivatives.
Journal ArticleDOI
Synthesis of 3'-O2-(azaheterocycle)-thymidines.
Guillaume Prestat,Didier Dubreuil,Ané Adjou,Jean Paul Pradere,Jacques Lebreton,Michel Evers,Yvette Henin +6 more
TL;DR: The synthesis of 3′-O 2-(azaheterocycle)-thymidines is presented from 1-thia-3-aza-1,3-butadiene precursors (N-thioacylamidines) and a variety of heterocycles is accessible using the dienic, the electrophilic or the nucleophilic reactivity of these thia-azabutadiene systems.
References
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Bull. Soc. Chim. Fr.
G. Hugel,G. Ourisson,J. Bye,J Miquel,D. P. Funeriu,Y He,H Bister,J-M Lehn,M Mousseron,J. M. Kamenka,Darvich +10 more
Journal ArticleDOI
Diels-Alder reactions of azadienes
TL;DR: On etudie successivement les systemes aza-1 butadiene, triazabutadiene and diaza- 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
Journal ArticleDOI
Über Säureamidacetale, Harnstoffacetale und Lactamacetale
TL;DR: In this paper, a reaktionsfahigen reaktiver CH3-oder CH2-Gruppe unter Bildung von Aminoalkyliden-Verbindungen is discussed.
Journal ArticleDOI
Diels‐Alder‐Reactions Part I: New Preparative Aspects
TL;DR: The mechanistic aspects of the Diels-Alder reactions will be discussed later in the second part of this contribution as discussed by the authors, and the systematization of the preparative uses of these reactions which is offered in this paper relates predominantly to recent results.