Asymmetric intramolecular Michael reaction catalyzed by an organocatalyst derived from cysteine has been developed for the synthesis of chiral bicyclo [4.3. 0] nonene and cis- disubstituted cyclopentane skeletons with a creation of three or two contiguous chiral centers in good yield with high diastereo-and excellent enantioselectivities.
[Richards, Elinor L; Murphy, Patrick J; Dinon, Francesca; Fratucello, Silvia; Brown, Paul M; Gelbrich, Thomas; Hursthouse, Michael B Tetrahedron, 2001 , vol. 57, # 36 p. 7771 - 7784]