Diels-Alder Reactions of 1,1-Disubstituted 3,4-Dimethylene-cyclopentanes. Preparation of Indanes and Diazaindanes

Abstract
Compounds possessing indane and diazaindane skeletons are prepared by two routes: i) reaction of 1,2-bis(bromomethyl)-benzenes with active methylene compounds and ii) Diels-Alder reaction of 1,1-disubstituted-3,4-dimethylenecyclopentanes.