ChemInform Abstract: Chemoselective Phosphine-Catalyzed Cascade Annulations Between Two Different Activated Alkenes: Highly Diastereoselective Syntheses of Polysubstituted Cyclohexanes and Cyclopentenes.
Abstract
Cascade [2 + 2 + 2] and [2 + 2 + 1] annulations between 2 molecules of 2-arylidene cyanoacetates or malononitriles and 1 molecule of α,β-unsaturated ketones are presented.