Enantioselective Synthesis of the Platensimycin Core by Silver(I)‐Promoted Cyclization of Δ<sup>6</sup>‐α‐Iodoketone
作者:Milos Trajkovic、Zorana Ferjancic、Radomir N. Saicic、Filip Bihelovic
DOI:10.1002/chem.201900497
日期:2019.3.21
A chiral‐pool‐based synthesis of the platensimycin core was achieved using (S)‐lactic acid as an inexpensive starting material. The cyclohexenone ring was closed in a Mukaiyama–Michael domino sequence, while the quaternary stereocenter was created by a highly stereoselective decarboxylative allylation. The spirobicyclic skeleton was constructed by a RCM reaction. A new silver(I)‐promoted cyclization
使用(S)-乳酸作为廉价的原料,可以实现基于手性池的新霉素核心的合成。环己烯酮环以Mukaiyama-Michael多米诺序列封闭,而四级立体中心是由高度立体选择性的脱羧烯丙基化产生的。螺双环骨架是通过RCM反应构建的。Δ的一个新的银(I)促进的环化反应6 -和Δ 7 -α-iodoketones被开发并应用于枢轴碳-碳键形成。还介绍了此方法的范围和局限性。