A novel one-pot synthesis of 1,2,4-triazole-3,5-diamine derivatives from isothiocyanates and mono-substituted hydrazines
作者:Chunjian Liu、Edwin J. Iwanowicz
DOI:10.1016/s0040-4039(02)02871-x
日期:2003.2
1,2,4-Triazole-3,5-diamine derivatives were synthesized in moderate to high yields in one-pot reaction from the corresponding isothiocyanates, mono-substituted hydrazines, and sodium hydrogencyanamide, in the presence of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride. Typically, two target compounds were obtained, but high regioselectivities to one isomer were observed when aromatic and