in diethyl ether T=0°C; conjugate addition of lithium organothienylcuprate reagents to enones and enoates, resioselectivity of various lithium organocuprates; Product distribution;

in diethyl ether T=0°C; various lithium organocuprates; conjugate addition of lithium organothienylcuprate reagents to enones and enoates, effect of ratio substrate/reagent, regioselectivity; Product distribution;