Role of quaternaryammonium permanganates in the synthesis of substituted guanidines—a comparative study
摘要:
Quaternaryammonium permanganate transforms 1,3 -diarylthioureas in the presence of an amine to the respective trisubstituted guanidines in excellent yields. (C) 2000 Elsevier Science Ltd. All rights reserved.
o-Iodoxybenzoic acid mediated oxidative condensation: synthesis of guanidines using 1,-3-disubstituted thiourea precursors
作者:Prasad S. Dangate、Krishnacharya G. Akamanchi
DOI:10.1016/j.tetlet.2012.09.130
日期:2012.12
An efficient and mild oxidative condensation procedure using o-iodoxybenzoic acid and triethylamine or ammonia as base has been developed for the synthesis of guanidines starting from easily synthesizable 1,3-disubstituted thioureas and amines or ammonia. (C) 2012 Elsevier Ltd. All rights reserved.