Diels–Alder dimerization of 2-arylmaleimides. X-Ray crystal structure of the dimer of 2-p-tolylmaleimide
Abstract
Dimers (4) and (7) were obtained during the course of the Meerwein arylation reaction; a Diels–Alder reaction is proposed for the mechanism of the dimerization, and the X-ray structure of (4) is reported.