[4+2] cycloaddition reactions of neutral 2-azadienes with electron-deficient dienophiles

摘要

A method for the preparation of functionalized tetrahydropyridine and triazine derivatives is described,based on aza Diels-Alder reaction of neutral 2-aza-1,3-dienes with electron-poor dienophiles as tetracyanoethylene and N-phenyl-1,2,4-triazoline-3,5-dione.