Hydroalumination of Alkenes and Alkynes with LiAlH4 Catalyzed by [C-5(CH3)(5)](2)TiCl2

A srudy was conducted to report a rapid and convenient procedure for the regioselective hydroalumination of alkenes with LiAlH4 in the presence of [C5(CH3)5]2TiCl2 and an efficiency of the reaction was evaluated by converting the alkenes to the alkylaluminates under mild conditions. The catalytic hydroalumination of terminal alkynes to alkenes was also described together with reaction of the internal alkynes. All glassware used was predried in an oven, assembled hot and cooled with a stream of argon in glove box. All reactions were carried out under argon atmosphere. All solvents were distilled and stored over an appropriate drying agent.