The observation that their transmetalations with trans -[PdRfCl(PPh 3 ) 2 ] (Rf = fluoroaryl) give stereoselectively a different isomer of [PdRfMe(PPh 3 ) 2 ] suggests that Negishi reactions with ZnRX or ZnR 2 could show very different evolutions.
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Casares et al. (2007) studied this question.
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