Electroreductive Olefin–Ketone Coupling

Abstract:

A user-friendly approach is presented to sidestep the venerable Grignard addition to unactivated ketones to access tertiary alcohols by reversing the polarity of the disconnection. In this work a ketone instead acts as a nucleophile when adding to simple unactivated olefins to accomplish the same overall transformation. The scope of this coupling is broad as enabled using an electrochemical approach, and the reaction is scalable, chemoselective, and requires no precaution to exclude air or water. Multiple applications demonstrate the simplifying nature of the reaction on multistep synthesis, and mechanistic studies point to an intuitive mechanism reminiscent of other chemical reductants such as SmI2 (which cannot accomplish the same reaction).

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Source

J. Am. Chem. Soc. 2020, 142, 50, 20979–20986

Publication Date: December 1, 2020

Graphical Abstract

Authors:

Pengfei Hu, Byron K. Peters, Christian A. Malapit, Julien C. Vantourout, Pan Wang, Jinjun Li, Lucas Mele, Pierre-Georges Echeverria, Shelley D. Minteer*, and Phil S. Baran*

 

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