Total synthesis of monoterpenoid indole alkaloid (–)-arbophyllidine

Organic Chemistry Frontiers
2022.0

Abstract

The first asymmetric total synthesis of indole alkaloid arbophyllidine has been accomplished. The synthesis features an intramolecular reductive Heck reaction to install the key quaternary carbon center and a Fischer indolization to efficiently construct the tetracyclic skeleton. Moreover, a novel NaClO2-mediated oxidative lactonization was achieved via selective oxidation at C-16 of the tetracyclic aldehyde. Density functional theory calculations provided an incisive understanding of the oxidative lactonization.

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