Cu/Mn Co-oxidized Cyclization for the Synthesis of Highly Substituted Pyrrole Derivatives from Amino Acid Esters: A Strategy for the Biomimetic Syntheses of Lycogarubin C and Chromopyrrolic Acid
作者:Nini Zhou、Tao Xie、Lin Liu、Zhixiang Xie
DOI:10.1021/jo500740w
日期:2014.7.3
An effective and concise approach to synthesis of tetrasubstituted pyrroles from readily available aminoacidesters by the promotion of Cu(OAc)2 in conjunction with Mn(OAc)3 has been developed. This reaction proceeds through multiple dehydrogenations, deamination, and oxidative cyclization. This oxidized system tolerates substrates bearing various electron-donating or electron-withdrawing groups.