This short report describes an improved, reliable, and high-yielding (>90%) synthesis of 2-[2,3-bis(tert-butoxycarbonyl)guanidino]ethylamine. The method is scalable (>5 g), and the product obtained directly from the reaction mixture requires no further purification. In addition, this methodology can be successfully applied to other diamine substrates (1,3-propyl and 1,4-butyl; 70% and 61% yield, respectively)
A facile synthesis of imino-protected cyclic guanidine derivatives from diamines
作者:Jian Hai Yuan、Xiao Xiao Yang、Hao Lin、De Xin Wang
DOI:10.1016/j.cclet.2011.07.008
日期:2011.12
A convenient one-step synthesis of five-membered or six-membered imino-protected cyclicguanidine via an intramolecular ring-closure reaction of alkyl diamine (2a–2g) with 1, 3-diamino-protected methylisothiourea (1a and 1b) was established and investigated. Amino guanidine such as 3-(2-aminoethyl)-1, 2-dibenzyloxycarbonylguanidine (4a) has been proved to be the intermediate of the reaction via utilizing