Ir. Trehan et al., A HIGHLY STEREOSELECTIVE SYNTHESIS OF DES-A B-AROMATIC AZASTEROIDS, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 34(6), 1995, pp. 484-486
An efficient stereoselective synthesis of des-A B-aromatic azasteroid
(5) has been achieved by intramolecular Diels-Alder reaction (IMDAR) o
f the orthoquinodimethane obtained by thermolysis of xybenzocyclobuten
-1-yl)methyl]-2-methylpropenamide (3).