Template catalysis by manganese pincer complexes: Oxa- and aza-Michael additions to unsaturated nitriles

Shan Tang, David Milstein

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Activation of CN bonds by metal-ligand cooperation provides a new route for the functionalization of nitriles. Herein, we report the electrophilic activation of unsaturated nitriles by dearomatized manganese pincer complexes for the oxa- and aza-Michael addition reactions under very mild and neutral conditions. Derivatives of acrylonitrile and allyl cyanide furnished the corresponding β-addition products by reacting with alcohols and amines. Mechanistically, the catalysis is mostly ligand based. Reaction of the dearomatized PNN-Mn complex with 2-pentenenitrile or 3-pentenenitrile furnished an enamido-Mn complex. The equilibrium between an enamido complex and a ketimido complex, and reversible C-C bond formation with the ligand are proposed to play central roles in the catalysis.

Original languageEnglish
Pages (from-to)8990-8994
Number of pages5
JournalChemical Science
Issue number39
Publication statusPublished - Jan 1 2019


ASJC Scopus subject areas

  • Chemistry(all)

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