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2005
Thioethers
Q 0580
31- 099
Asymmetric Michael Addition of Arylthiols to α,β-Unsaturated Carbonyl
Compounds Catalyzed by Bifunctional Organocatalysts. — Thiourea and tertiary
amine-based chiral organocatalysts catalyze the asymmetric Michael addition of arylthiols (II) to α,β-unsaturated carbonyl compounds (I) and (IV) in a concerted double
activation way. Enantioselectivity up to 85% is achieved. In addition, up to 60% enantiomeric excess is achieved on the α-carbon center in an asymmetric α-protonation reaction. — (LI, B.-J.; JIANG, L.; LIU, M.; CHEN*, Y.-C.; DING, L.-S.; WU, Y.;
Synlett 2005, 4, 603-606; Dep. Med. Chem., Sichuan Univ., Chengdu, Sichuan
610041, Peop. Rep. China; Eng.) — H. Hoennerscheid
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