2-(Alkoxycarbonylmethylidene)-4-aryl-5- (dialkylamino)thiophen-3(2H)-ones were synthesized by condensation of N,N-(dialkyl)warylthioacetamides with dialkyl acetylenedicarboxylates. Intermediate substituted vinylic sulfides were isolated. When heated or in the presence of an acid or a base, they undergo cyclization into thiophenes.
Reactions of Thioamides and Selenoamides with Hydrazonoyl Chlorides Under Phase-Transfer Conditions. A Convenient Method of Preparation of δ<sup>2</sup>-1,3,4-Thiadiazolines and δ<sup>2</sup>-1,3,4-Selenadiazolines
作者:M. L. Petrov、M. A. Abramov
DOI:10.1080/10426509808545473
日期:1998.2.1
Reactions of enolizable thio- and selenoamides with hydrazonoyl chlorides in the presence of bases and phase-transfer catalysts result in 2-dialkylamino-Δ2-1,3,4-thia- and selenadiazolines. The reactions proceed through formation of corresponding enethiolates and eneselenolates. At 80°C 2-dialkylamino-Δ2-1,3,4-thia- and selenadiazolines eliminate dialkylamines, giving 2-ylidene-Δ2-1,3,4-thia- and selenadiazolines
Abramov, M. A.; Galishev, V. A.; Petrov, M. L., Russian Journal of Organic Chemistry, 1993, vol. 29, # 11.1, p. 1805 - 1810
作者:Abramov, M. A.、Galishev, V. A.、Petrov, M. L.
DOI:——
日期:——
Reaction of (p-alkoxyphenyl)-acetothioamides with acetylene-dicarboxylic esters
作者:M. F. Kosterina、T. V. Rybalova、Yu. V. Gatilov、Yu. Yu. Morzherin
DOI:10.1007/s10593-009-0291-x
日期:2009.4
The condensation of p-methoxy(ethoxy)phenylacetothioamides with acetylenedicarboxylic esters leads to two condensation products, 2-(alkoxycarbonylmethylene)-4-(4-methoxy(ethoxy)phenyl)-5-morpho-lino-3H-thiophen-3-ones and 2-(alkoxycarbonylmethylene)-4-(4-methoxy(ethoxy)phenyl)-5-alkoxy-3H-thiophen-3-ones. It was shown that the substitution of the morpholino group is intramolecular.
MNDZHOYAN O. L.; PAXLEVANYAN M. Z.; MELKONYAN D. A.; GERASIMYAN D. A., ARM. XIM. ZH. <AUKZ-AN>, 1974, 27, HO 12, 1051-1055
作者:MNDZHOYAN O. L.、 PAXLEVANYAN M. Z.、 MELKONYAN D. A.、 GERASIMYAN D. A.