Unprecedented conversion of (Z)-3-chloro-3-arylacrylic acids to benzoic acids: synthesis of s-triazolo[3,4-b][1,3,4]thiadiazoles
摘要:
An unprecedented method for the conversion of (Z)-3-chloro-3-arylacrylic acids to corresponding benzoic acids by stirring in POCl3 at 80 degrees C is reported. The benzoic acids formed in situ undergo condensation with 4-amino-5-aryl-3-mercapto-1,2,4-triazoles to yield s-triazolo[3,4-b][1,3,4]thiadiazoles in high yields. (C) 2014 Elsevier Ltd. All rights reserved.
The application of (Z)-3-aryl-3-haloenoic acids to the synthesis of (Z)-5-benzylidene-4-arylpyrrol-2(5H)-ones
作者:John T. Gupton、Nakul Telang、Edith J. Banner、Emily J. Kluball、Kayleigh E. Hall、Kara L. Finzel、Xin Jia、Spencer R. Bates、R. Scott Welden、Benjamin C. Giglio、James E. Eaton、Peter J. Barelli、Lauren T. Firich、John A. Stafford、Matthew B. Coppock、Eric F. Worrall、Rene P.F. Kanters、Kerry Keertikar、Rebecca Osterman
DOI:10.1016/j.tet.2010.09.080
日期:2010.11
Studies directed at the synthesis of (Z)-5-benzylidene-4-arylpyrrol-2(5H)-ones from (Z)-3-aryl-3-haloenoic acids are described The successful strategy relies on the preparation of (Z)-3-aryl-3-haloenoic acids from acetophenones through the corresponding (Z)-3-aryl-3-haloenals and the conversion of the (Z)-3-aryl-3-haloenoic acids to (Z)-5-benzylidene-4-aryl-5H-furan-2-ones The furanones were subsequently treated with primary amines and dehydrated to the corresponding (Z)-5-benzylidene-4-arylpyrrol-2(5H)-one (C) 2010 Elsevier Ltd All rights reserved