Facial and Efficient Access to Dihydropyrano[3,2-c]Chromenes via Three-Component Reaction Using N,N-Dimethylbenzylamine As a New Organocatalyst.


The N,N-dimethylbenzylamine (DMBA), as an efficient and commercially available organocatalyst was employed for the one-pot synthesis of dihydropyrano[3,2-c]chromene derivatives in ethanol medium. In this work, the one-pot Knoevenagel-Michael-Thorpe-Ziegler type cascade heterocyclization has been developed for the synthesis of dihydropyrano[3,2-c]chromene… (More)


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