METHOD FOR PRODUCING TRIMETHYL ALUMINUM-DIMETHYL ALUMINUM HYDRIDE COMPOSITION
PROBLEM TO BE SOLVED: To provide a trimethyl aluminum-dimethyl aluminum hydride capable of attaining the reduction of production cost. SOLUTION: Methyl aluminum halides and alkali metals of below 1 mol to 1 mol of the halogen atoms of the methyl aluminum halides are reacted to produce a mixture containing trimethyl aluminum and dimethyl aluminum halide, and thereafter, the mixture and a metal hydride are reacted to produce dimethyl aluminum halide. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
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Paragraph 0140 - 0151
(2017/05/12)
Aluminum Hydride Catalyzed Hydroboration of Alkynes
An aluminum-catalyzed hydroboration of alkynes using either the commercially available aluminum hydride DIBAL-H or bench-stable Et3Al?DABCO as the catalyst and H-Bpin as both the boron reagent and stoichiometric hydride source has been developed. Mechanistic studies revealed a unique mode of reactivity in which the reaction is proposed to proceed through hydroalumination and σ-bond metathesis between the resultant alkenyl aluminum species and HBpin, which acts to drive turnover of the catalytic cycle.
Bismuto, Alessandro,Thomas, Stephen P.,Cowley, Michael J.