Assembly of Substituted 3-Methyleneisoindolin-1-ones via a CuI/<scp>l</scp>-Proline-Catalyzed Domino Reaction Process of 2-Bromobenzamides and Terminal Alkynes

Abstract

CuI/l-proline catalyzed coupling of 2-bromobenzamides and terminal alkynes in i-PrOH (or DMF and DMSO) at 85-110 degrees C and subsequent additive cyclization produces substituted 3-methyleneisoindolin-1-ones. Variation of N-substituents, aromatic ring, and methylene part is possible by using suitable starting materials.