acetone in pentane byproducts: isobutene; Me2CO was dropwise added to soln. of alane (1:1 molar ratio) in pentane at -75°C under N2 atmosphere, mixt. was allowed to warm to room temp., refluxed for 30 min; isobutene evolved was collected in a gas burette and analysed by GLC, solvent from the reaction mixt. was distilled off; hydrolysis of residue observed yielding i-PrOH, i-butanol, i-butane, hexane, and 1-hexene (extrn. with ether and analys by GLC);

in hexane; toluene Ar; mixing Al-compd. soln. (toluene) with org. compd. soln. (hexane), accordinf to S. V. Ley et al., J. Chem. Soc., Perkin Trans. 1 (1997) 3299;

in dichloromethane T=20°C; 0.5 h;

1: With zinc(II) chloride; bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran 2: With tetrabutyl ammonium fluoride in tetrahydrofuran

1.1: ZnCl2 / PdCl2(PPh3)2 / tetrahydrofuran 1.2: 84 percent / TBAF / tetrahydrofuran 2.1: 51 percent / PCC; MS4A / CH2Cl2 View Scheme

1: diisobutyl(hex-1-en-1-yl)alane With pyridine in dichloromethane 2: [1,1'-biphenyl]-4-sulfonyl chloride With triphenyl-phosphine oxide in dichloromethane 1 h; Reflux;