catalyst: Ni(COD)2-Me2P(CH2)3PMe2 in toluene alkynylstannane and 1,2-diene (molar ratio 1:1.5) reacted in toluene in presence of Ni complex (0.05 equiv.) and phosphine (0.05 equiv.) at 50°C for 26 h; detd. by (119)Sn NMR spectra; PhC2CH(Bu)C(CH2)SnMe3 and PhC2CH2C(SnMe3)CHBu (37:63) obtained, total yield 81percent;