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its all about organometallic chemistry of zinc and copper metal

Reaction of

Reaction of Organocuprates • In bicyclic system below, addition is chemoselective, involving the. The reaction is also less hindered double bond of the dienone and stereoselective in that introduction of the “Me” group occurs preferentially from the less hindered side of the molecule.

Reaction of Organocuprates • The mechanistic picture for addition of organocuprates to α,βunsaturated carbonyl compounds is no less complex than that for substitution reactions. • On the basis of current information, conjugate addition of lithiocuprates to α, β-unsaturated ketones and esters may proceed via a initial reversible copper(I)-olefin-lithium association, which then undergoes oxidative addition followed by reductive elimination.

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