Abstract

An efficient cycloaddition reaction of 1-alkoxy-1-azadienes with alpha,alpha-dicyanoalkenes is described, which gives facile access to highly substituted 3-hydroxypyridines in very good yields and with complete regiocontrol and chemoselectivity. The reaction path was investigated in detail by quantum mechanics calculations, reporting that a concerted cycloaddition mechanism and thermodynamic control synergistically contribute to the observed selectivity.

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