Abstract
Alkenylethylzincs, obtained from the corresponding trialkenylboranes by transmetallation with diethylzinc, couple with aryl iodides in the presence of Pd(PPh 3) 4, 0.19–0.28 mol%, to produce trisubstituted alkenes in good isolated yields. Both the transmetallation and subsequent coupling occur with complete retention of stereochemistry.
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