ChemInform Abstract Reaction of the α,β-unsaturated ketones (I) with mixed triorganozincates, derived from ZnCl2•TMEDA, MeLi (II), and the organomagnesium chlorides (III), yields mainly the 1,4-adducts (IV), togehter with small amounts of the 1,2-adducts (V) and the methylated analogues (VI) and (VII).
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