Manganese-mediated/-catalyzed oxidative carboazidation of acrylamides

Abstract

Manganese-mediated/-catalyzed oxidative carboazidation of acrylamides was developed for the synthesis of various azido oxindoles in 32% to 99% yields. tert-Butyl peroxybenzoate (TBPB) was used as an oxidant for the Mn-catalyzed method. And a Mn(II)/Mn(IV)/Mn(III) catalysis cycle via a stepwise or concerted regeneration of high-valent manganese was proposed for this protocol. This reaction system exhibits great functional group tolerance.