Influence of solvent and substituents on the reaction of N-alkylthioacetamides with dimethyl acetylenedicarboxylate: synthesis of functionalized thiophenes containing an exocyclic double bond
作者:Konstantin L. Obydennov、Elena L. Klimareva、Marya F. Kosterina、Pavel A. Slepukhin、Yury Yu. Morzherin
DOI:10.1016/j.tetlet.2013.06.127
日期:2013.9
The reaction of thioacetamides with dimethylacetylenedicarboxylate affords 3-oxothien-2-ylidene or 4-oxothiazol-2,5-ylidene derivatives based on the structure of the thioacetamides and the solvent employed. The structural features of the 3-oxothien-2-ylidenes are discussed.
Synthesis of 4,5-disubstituted-3-trihalomethylisothiazoles
作者:Michael P. Zawistoski、Shannon M. Decker、David A. Griffith
DOI:10.1016/j.tetlet.2009.10.051
日期:2009.12
Herein, we describe the synthesis of 4,5-disubstituted-3-trihalomethylisothiazoles from trihaloacetonitriles and 2-cyanothioacetamides or 2-ethoxycarbonylthioacetamides. The reactivity of the necessary trihaloacetonitriles has a significant impact on the observed reaction pathways. Reactions with CF3CN require an oxidant to mediate cyclization, while CCl3CN functions as both the reactant and oxidant. (C) 2009 Elsevier Ltd. All rights reserved.
Reaction of Enamines and Azaenamines Containing a Thioamide Group with Dimethyl Acetylenedicarboxylate
作者:N. P. Belskaya、K. I. Lugovik、A. D. Ivina、V. A. Bakulev、Z. J. Fan
DOI:10.1007/s10593-014-1543-y
日期:2014.9
The reaction between enamines and azaenamines containing a thioamide group and dimethyl acetylenedicarboxylate was studied under various conditions. It was shown that exchanging one of the carbon atoms in the structure of the investigated compounds for a nitrogen atom significantly affected the reactivity. Functionalized thiopyrans and thiazolidinones were obtained during this investigation.