Total synthesis of proposed structure of coibamide A, a highly N- and O-methylated cytotoxic marine cyclodepsipeptide
作者:Wei He、Hai-Bo Qiu、Yi-Jie Chen、Jie Xi、Zhu-Jun Yao
DOI:10.1016/j.tetlet.2014.09.047
日期:2014.10
Totalsynthesis of the originally proposed structure of coibamide A, a highly N- and O-methylated cytotoxic marine cyclodepsipeptide, has been accomplished by using a [(4+1)+3+3]-peptide fragment-coupling strategy and careful examination and optimization of the multiple dense N-methylated amide-bond formations. The synthetic sample of the proposed coibamide A could not match the natural product in
To enable the large-scale synthesis of coibamide A, we developed an improved synthetic strategy for this class of cyclodepsipeptide. The versatility of the synthetic procedure was demonstrated by the preparation of a series of designed coibamide A analogues, which enabled the preliminary structure–activity relationship (SAR) studies for this compound. Although most modifications of coibamide A resulted