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2005
Sulfonamides
Q 0560
Catalytic, Asymmetric aza-Baylis—Hillman Reaction of N-Sulfonated Imines
2-Cyclohexen-1-one and 2-Cyclopenten-1-one in the Presence of a Chiral
34- 111 with
Phosphine Lewis Base. — A chiral phosphine Lewis base DPB is used in the
Baylis—Hillman reaction of imines (I) with cyclopentenone and cyclohexenone as
Michael acceptors. The corresponding adducts (III) and (VI) are obtained in good
yields and moderate enantiomeric excess. — (SHI*, M.; LI, C.-Q.; Tetrahedron:
Asymmetry 16 (2005) 7, 1385-1391; State Key Lab. Organomet. Chem., Shanghai
Inst. Org. Chem., Chin. Acad. Sci., Shanghai 200032, Peop. Rep. China; Eng.) —
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