Total Synthesis of Chloptosin, a Potent Apoptosis-Inducing Cyclopeptide
作者:Shun-Ming Yu、Wen-Xu Hong、Yuan Wu、Chun-Long Zhong、Zhu-Jun Yao
DOI:10.1021/ol100135a
日期:2010.3.5
A bidirectional totalsynthesis of chloptosin has been achieved in 16 operations (32 individual reactions) and 3% overall yield from the readily available materials. Palladium-catalyzed tryptophan synthesis, diastereoselective selenocyclization and oxidative deselenation successfully served as key steps in construction of the dimeric core amino acid. 2-Bromo-1-ethyl pyridinium tetrafluoroborate was