Synthesis of the E and Z isomers of 3-(5-aryl-1,3,4-oxadiazol-2-yl)acrylic acids
作者:S. S. Rozhkov、K. L. Ovchinnikov、G. G. Krasovskaya、A. S. Danilova、A. V. Kolobov
DOI:10.1134/s1070428015070155
日期:2015.7
Two procedures have been proposed for the synthesis of pure (E)- and (Z)-3-(5-aryl-1,3,4-oxadiazol-2-yl)acrylic acids, by one-step cyclization of (Z)-4-(2-aroylhydrazinyl)-4-oxobut-2-enoic acids or via initial cyclization of (Z)-4-(2-aroylhydrazinyl)-4-oxobut-2-enoic acids to 5-(aroylhydrazinylidene)furan-2(5H)-ones which are then converted into the target compounds.