Fast and Efficient Synthesis of Pyrano[3,2-c]quinolines Catalyzed by Niobium(V) Chloride

Abstract

A highly efficient two-step method for the synthesis of pyranoquinoline derivatives from imino-Diels-Alder reactions between aldimines and 3,4-dihydro-2H-pyran using niobium(V) chloride as catalyst under mild conditions is described.

Diels-Alder reactions - Lewis acids - catalysis - quinolines - Schiff bases

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