Copper‐Catalyzed Cross‐Coupling of Fluorinated Vinylstannanes with Organic Halides

β‐stannylated propenoates 2 bearing a β‐trifluoromethyl group, readily available by hydrostannation of 1 , undergo copper(I) catalyzed coupling reactions without any palladium catalyst with allyl, benzyl, alkynyl, acyl and aryl halides. The corresponding adducts were obtained in moderate to good yields with a total retention of the double bond configuration. Interestingly, allyl bromides substituted with a stabilizing group did not led to expected coupling products but to the isomerization products 3 . Thus, 31 examples are reported with yields up to 89 %. Finally, a mechanistic study was performed in order to confirm the mechanistic proposal.