Fig. 6. Synthetic utility and control experiments.
a Reduction of the alkyne moiety to E-alkenyl group; b Oxidation of the C–B bond to C–O bond; c Converted the C–B bond to C–H bond; d Preparation of the D-substituent product; e The non-linear effect studies of the enantioselective alkynylation of C–P bond with terminal alkynes. f Control study of the protonation of C–B bond; g Control study of the reduction of C–P bond without B2pin2.