Ring expansion reactions of 4-amino-1,1-dioxo-[1,2,3,5]-thiatriazoles
作者:Peter J. Duggan、Andris J. Liepa、Laura K. O'Dea、C. Elisabet Tranberg
DOI:10.1039/b615569c
日期:——
5-amino-1,1-dioxo-[1,2,4,6]-thiatriazines and. Initial alkylation of the thiatriazole with alpha-halo-esters at N-3 produces alpha-substituted esters which, under basic reaction conditions, undergo opening of the thiatriazole ring and re-closure to a thiatriazine ring. Similar alkylations of with diethyl chloromalonate and ethyl dichloroacetate lead to the loss of SO2 and the production of triazine and