Gold-Catalyzed [3+3]-Annulation of Azomethine Imines with Propargyl Esters
摘要:
The gold-catalyzed [3+3]-cycloaddition reaction of propargyl. esters and azomethine imines has been developed. The reaction provides a rapid entry into a wide range of substituted tetrahydropyridazine derivatives from simple starting materials. A stepwise mechanism involving addition of the 1,3-dipole to a gold-carbenoid intermediate is proposed.