Vinyltin compounds are very useful reagents whose tin moieties can be transformed to various organic groups through the Kosugi–Migita–Stille coupling. 1 One of the most powerful synthetic methods for synthesis of vinyltins is hydrostannation of C–C triple bonds. Regioselective hydrostannation, however, is generally limited to terminal alkynes , in which the stannation occurred at the terminal carbon to give β-substituted vinyltins. 2 Few methods are available for ...