Cyclopeptide alkaloids. Synthesis of the ring system and its ion affinity
作者:J. Clark Lagarias、Richard A. Houghten、Henry Rapoport
DOI:10.1021/ja00494a030
日期:1978.12
Several examples of the 14-membered, para-bridged ring system of the cyclopeptidealkaloids have been synthesized via an active ester cyclization. The yield of monomeric cyclopeptide varied from 1 to 33% and was affected by the amino acid substitution pattern and amide conformation of the linear peptide precursors. Both the synthetic models and a naturally occurring cyclopeptidealkaloid, ceanothine B, bind