Synthetic Studies on Stevastelins. 1. Total Synthesis of Stevastelins B and B3
作者:Francisco Sarabia、Samy Chammaa
DOI:10.1021/jo050625l
日期:2005.9.1
The synthesis of stevastelin B3 (2) and B (5) are described. In a first approach, epoxy cyclodepsipeptide 8 was considered as a promising candidate for the synthesis of the [15]-membered ring members of the stevastelins; however, the oxirane ring opening, required for the completion of the natural stevastelin synthesis, failed. Thus, we synthesized stevastelin B (5), carrying out the oxirane ring opening
描述了stevastelin B3(2)和B(5)的合成。在第一种方法中,环氧环二肽8被认为是合成Stevastelins的[15]元环成员的有前途的候选者。然而,完成天然stevastelin合成所需的环氧乙烷开环失败。因此,我们合成了stevastelin B(5),在合成过程中较早地进行了环氧乙烷开环,并遵循了能够递送类似物的合成方案。另一方面,[15]成员环衍生物59的内酯化反应导致合成了stevastelins家族的天然[13]成员环成分stevastelin B3(2)。