N,N′-Di-Boc-Substituted Thiourea as a Novel and Mild Thioacylating Agent Applicable for the Synthesis of Thiocarbonyl Compounds
作者:Biao-Lin Yin、Zhao-Gui Liu、Jian-Cun Zhang、Zheng-Rong Li
DOI:10.1055/s-0029-1219273
日期:2010.3
Stable and readily available N,N′-di-Boc-substituted thiourea, when activated with trifluoroacetic acid anhydride, was used as a novel thioacylating agent. Through the thioacylation of nucleophiles, such as amines, alcohols, thiols, sodium benzenethiolate, and sodium malonates with N,N′-di-Boc-substituted thiourea, a series of thiocarbonyl compounds were prepared under mild conditions with good chemical selectivity and functional group tolerance.
An efficient method for the synthesis of disubstituted thioureas via the reaction of N,N′-di-Boc-substituted thiourea with alkyl and aryl amines under mild conditions
An efficient method for the synthesis of disubstituted thioureas via the reaction of N,N′-di-Boc-substituted thiourea 5 with alkyl and aryl amines undermildconditions has been developed. In the presence of NaH as a base, trifluoroacetic anhydride (TFAA) reacted with 5 providing intermediate 6, which then reacted with amines giving thioureas 7 in excellent yields. This reaction conditions tolerated