Helvetica Chimica Acta

Stereospecific Olefin Synthesis via Lithium Vinylcuprates

F Näf, P Degen

Index: Naef,F.; Degen,P. Helvetica Chimica Acta, 1971 , vol. 54, p. 1939 - 1949

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Citation Number: 59

Abstract

Abstract The conjugate addition of cis-or trans-1-alkenyl-cuprolithium complexes (R [BOND] CH [DOUBLE BOND] CH [BOND]) 2 CuLi· X n 1 to α, β-unsaturated carbonyl compounds was found to occur with high retention of double bond geometry, affording isomerically pure cis-or trans-γ, δ-ethylenic carbonyl compounds. The same 1-alkenylcuprates also react stereospecifically with alkyl halides to give isomerically pure cis-or trans-olefins.

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