Short, Enantioselective Total Synthesis of Okaramine N
作者:Phil S. Baran、Carlos A. Guerrero、E. J. Corey
DOI:10.1021/ja034491+
日期:2003.5.1
enantioselective totalsynthesis of a member of the okaramine family of bis-indole alkaloids, okaramine N (1), has been accomplished via intermediates 2-7, as outlined. The N-prenylated derivative of (S)-tryptophan methylester (2) was coupled with Fmoc-protected N-tert-prenylated tryptophan (3) to form the amide 4 in 70% yield. Pd(II)-mediated cyclization/rearrangement, a key step in the synthesis, transformed