Assembly of Substituted 3-Methyleneisoindolin-1-ones via a CuI/l-Proline-Catalyzed Domino Reaction Process of 2-Bromobenzamides and Terminal Alkynes
摘要:
CuI/L-proline catalyzed coupling of 2-bromobenzamides and terminal alkynes in 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.