An Efficient and Facile Synthesis of tert-Butyl 2-(Methylamino)-3-nitro-5-oxo-4-aryl-7,8-dihydro-4H-pyrano[3,2-c]pyridine-6(5H)-carboxylate derivatives in [BMIM]BF4

摘要

In this research, we have developed an efficient three-component reaction for the synthesis of pyrano[3,2-c]pyridine derivatives from the reaction of aromatic aldehydes, tert-butyl 2,4-dioxopiperidine-1-carboxylate, and N-methyl-1-(methylthio)-2-nitroethylen-1-amine in [BMIM]BF4 medium. The advantages of this method were readily available starting materials, simple reaction conditions, and satisfactory yields.