Enantioselective Synthesis of Cyclopropanone Equivalents and Application to the Formation of Chiral β‐Lactams
作者:Christopher M. Poteat、Yujin Jang、Myunggi Jung、J. Drake Johnson、Rachel G. Williams、Vincent N. G. Lindsay
DOI:10.1002/anie.202006786
日期:2020.10.12
derivatives have long been considered unsustainable synthetic intermediates because of their extreme strain and kinetic instability. Reported here is the enantioselective synthesis of 1‐sulfonylcyclopropanols, as stable yet powerful equivalents of the corresponding cyclopropanone derivatives, by α‐hydroxylation of sulfonylcyclopropanes using a bis(silyl) peroxide as the electrophilic oxygen source. This
长期以来,环丙烷酮衍生物一直被认为是不可持续的合成中间体,因为它们的极限应变和动力学不稳定。此处报道的是通过使用双(甲硅烷基)过氧化物作为亲电子氧源通过磺酰基环丙烷的α-羟基化反应,以对映选择性的方式合成1-磺酰基环丙醇,它是相应环丙烷酮衍生物的稳定而功能强大的当量。这项工作是对映体丰富的环丙烷酮衍生物的第一个通用方法。磺酰基部分的电子和空间性质都可以用作碱不稳定的保护基,并赋予这些环丙烷酮前体结晶性,这对平衡相应环丙烷酮的速率具有至关重要的影响。