CuCl; NaOC(CH3)3; (O3SC6H4)(((CH3)2CH)3C6H2)(C6H5)2C3H3N2 in tetrahydrofuran treatment of acetylene deriv. with 0.9 equiv. of boron compd. in presence of imidazolium deriv., copper chloride, sodium tert-butoxide and 1 equiv. of methanol in THF at -15°C for 24 h under N2; NMR;

in dichloromethane byproducts: H2; dropwise addn. of BH3*(CH3)2S (20 mmol) in (CH3)2S to soln. of pinacol (20 mmol) in dry THF; stirring for 1 h (0°C), then warming (25°C); stirring (1 h); addn. of Cl(CH2)3CCH (10 mmol) at 0°C; stirring (7 h, 25°C);; addn. of ether, pouring soln. into separatory funnel contg. satd. aq. NH4Cl; washing org. phase with satd. aq. NH4Cl, drying over MgSO4; evapg. solvent under vac.; flash chromy. of residue (hexane/ether); E/Z ratio 99:1, determined by chromy. (GLC);;

bis(cyclohexanyl)borane