Total Synthesis of (+)-Shearilicine

J Am Chem Soc. 2023 Mar 1;145(8):4394-4399. doi: 10.1021/jacs.2c13584. Epub 2023 Feb 15.

Abstract

Herein we report the first total synthesis of the indole diterpenoid natural product shearilicine by an 11-step sequence via a generalizable precursor to the highly oxidized subclass of indole diterpenoids. A native chiral auxiliary strategy was employed to access the target molecule in an enantiospecific fashion. The formation of the key carbazole substructure was achieved through a mild intramolecular Heck cyclization, wherein a computational study revealed noncovalent substrate-ligand and ligand-ligand interactions that promoted migratory insertion.