Asymmetric Michael reaction involving chiral imines secondary enamines:: Stereocontrolled synthesis of 2,2-disubstituted tetrahydrothiophen-3-ones

The asymmetric Michael reaction involving a chiral imine derived from 2-methyltetrahydrothiophenone-3-one and enantiopure (R)-1-phenylethylamine with a variety of electrophilic alkenes furnished 2,2-disubstituted tetrahydrothiophenone-3-ones with good yields and excellent stereoselectivity.