作者:Haishan Wang、Arasu Ganesan
DOI:10.1016/s0040-4039(97)00892-7
日期:1997.6
Reaction of the imine derived from L-tryptophan methyl ester and senecialdehyde with Fmoc-L-Pro-Cl induces an acyliminium Pictet-Spengler condensation, yielding a mixture of cis and trans tetrahydro-beta-carbolines. Deprotection of the cis product with concomitant diketopiperazine formation afforded the natural product in 20% overall yield. (C) 1997 Elsevier Science Ltd.