Pericyclic reaction of ketenes with cascade reaction products of pyridine N-oxides and dipolarophiles. X-ray structures of the adducts and formation mechanism.

Abstract

The structures of the adducts derived from the reactions of substituted ketenes with dihydropyridine derivatives have been clarified by single crystal X-ray analyses and the formation mechanism is discussed on the basis of the reaction-path calculations by semiempirical and density functional theory (DFT) molecular orbital methods.