Catalytic Asymmetric Reverse Prenylation of Indol-2-one Enabled a Synthesis of (−)-Debromoflustramine A
作者:Yi Hou、Jiyou Huo、Ruoxin Li、Jun Hou、Pan Lei、Hongbo Wei、Weiqing Xie
DOI:10.1021/acs.orglett.3c02296
日期:2023.9.29
A catalytic asymmetric nucleophilic reverse prenylation of indol-2-ones in situ generated from 3-bromooxindoles with prenyltributylstannane promoted by Ni(II)/chiral N,N′-dioxide was developed. This reaction provides facile access to C3 reverse-prenylated oxindoles in good to excellent enantioselectivities, which enabled the asymmetric synthesis of debromoflustramine A in five steps.
开发了由 Ni(II)/手性N,N'-二氧化物促进的异戊烯基三丁基锡烷对 3-溴氧吲哚产生的吲哚-2-酮原位催化不对称亲核反异戊二烯化反应。该反应以良好至优异的对映选择性方便地获得 C3 反向异戊二烯化羟吲哚,从而能够通过五个步骤不对称合成去溴氟曲明 A。