catalyst: Ni(COD)2-Ph2P(CH2)3PPh2 in toluene alkynylstannane and 1,2-diene (molar ratio 1:3) reacted in toluene in presence of Ni complex (0.05 equiv.) and phosphine (0.05 equiv.) at 0°C for 23 h; detd. by (119)Sn NMR spectra; PhC2CH(OMe)C(CH2)SnMe3 and PhC2CH2C(SnMe3)CHOMe (28:72) obtained, total yield 53percent;