B(C6F5)3 (10 mol%) SnBu3 R R1 + R1 R ... Hydrostannation of C–C multiple bonds with Bu3SnH prepared in situ from Bu3SnCl and Et3SiH in the presence of Lewis acid catalysts ... Vladimir Gevorgyan, Jian-Xiu Liu and Yoshinori Yamamoto* Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan ... A number of alkynes 5, allene 11 and alkene 13 smoothly underwent hydrostannation with tributyltin hydride 1, prepared in situ ...