Asymmetric Synthesis of (+)-Vellosimine Enabled by a Sequential Nucleophilic Addition/Cyclization Process

Org Lett. 2023 Nov 24;25(46):8215-8219. doi: 10.1021/acs.orglett.3c03170. Epub 2023 Nov 13.

Abstract

Herein, we achieved the asymmetric synthesis of (+)-vellosimine in 13 steps (longest linear sequences, LLS). This synthesis featured a sequential nucleophilic addition/cyclization process, which provided an efficient protocol for synthesizing a range of indole fused azabicyclo[3.3.1]nonane. Additionally, a SmI2-mediated reductive cyclization of ketone with an attached α,β-unsaturated ester for constructing the strained quinuclidine moiety was also highlighted.