Concise synthesis of the cell cycle inhibitor demethoxyfumitremorgin C
摘要:
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.
Concise synthesis of the cell cycle inhibitor demethoxyfumitremorgin C
摘要:
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.