Chlorination and Subsequent Cyclization to 1,3,4-Oxadiazoles of N1-Acyl-N3-cyanoguanidines and Related Compounds
作者:Takayuki Suyama、Tadashi Hasegawa、Motokazu Oda、Masahiko Tomaru、Hiroyuki Ohkoshi
DOI:10.3987/com-02-9630
日期:——
N-1-Acyl-, N-1-alkoxycarbonyl-, and N-1-(N,N-dialkylcarbamoyl)guanidines bearing electron-withdrawing cyano or sulfonyl group at the N-3-position were found to provide corresponding rearranged products, 1,3,4-oxadiazoles, when these guanidines were chlorinated by sodium hypochlorite followed by treating with base. Assignments of obtained compounds were accomplished by means of some reactions such as acid hydrolysis, alkoholysis, and catalytic hydrogenations, and of MS spectra.