Catalytic Asymmetric Reverse Prenylation of Indol-2-one Enabled a Synthesis of (-)-Debromoflustramine A

Org Lett. 2023 Sep 29;25(38):6949-6953. doi: 10.1021/acs.orglett.3c02296. Epub 2023 Sep 15.

Abstract

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.