Stille couphng mechanism

Mechanistically, while the reaction pathways of Pd-catalyzed systems have been properly investigated, the reaction pathway of Ni-catalyzed cross-couphng reactions remains relatively unexplored. On the basis of Stille s proposal [145] and the cross-coupling reactions developed by the Fu group, oxidative addition by a radical mechanism seems reasonable, as the stereogenic center is racemized... 

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