作者:Langlang Liu、Yian Guo、Qingchao Liu、Ranjala Ratnayake、Hendrik Luesch、Tao Ye
DOI:10.1055/s-0037-1610736
日期:2019.12
The totalsynthesis of endolides A and B has been achieved in a concise and highly stereoselective fashion (12 steps; 16.2 and 16.0% overall yield, respectively). Key features of the route include a modified Negishi coupling between 3-bromofuran and an organozinc reagent derived from an iodoalanine derivative for the synthesis of a 3-(3-furyl)alanine derivative, and a judicious choice of reaction conditions
内内酯 A 和 B 的全合成以简洁且高度立体选择性的方式实现(12 个步骤;总产率分别为 16.2% 和 16.0%)。该路线的主要特点包括 3-溴呋喃和源自碘代丙氨酸衍生物的有机锌试剂之间的改良根岸偶联,用于合成 3-(3-呋喃基)丙氨酸衍生物,以及明智地选择反应条件以克服构象限制通过将线性肽转化成相应的大环来放置。
First total synthesis and biological evaluation of the cyclic heptapeptide rhizonin A
The first totalsynthesis and biological evaluation of the naturallyoccurringcyclic heptapeptide rhizonin A are described. The synthesis includes solution-phase peptide synthesis and the preparation of NMe-3-(3-furyl)alanine (NMe-FurAla), a unique component of rhizonin A, which was prepared in chiral form via Barton-MacCombie deoxygenation as a key step. The bioactivity was assessed using 3T3–L1