hydrostannylation of ethyl 4,4,4‐trifluorobutynoate 1 with tributyltin hydride at room temperature is highly regio‐ and stereoselective, providing good yields of β‐trifluoromethyl (Z)‐α‐ or (Z)‐β‐stannylacrylates 2. Vinylstannanes 2 undergo a copper(I)‐catalyzed coupling reactions with allylic or propargylic bromides leading selectively to good yields of the corresponding allylated or propargylated products