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nature : lithium aluminum hydride reductant for the reaction. Application is the most widely hydrogen anion with Positive transferred to the atoms of the pro-nuclear Reaction. Reduction of lithium aluminum hydride ketone alcohol for the process are as follows. The lithium aluminum hydride four negative hydrogen ions can be transferred, but the transfer speed is different, step after step slower than before, it sometimes can also use one of two or three hydrogen atoms have been replaced by alkoxy lithium aluminum hydride derivatives as a reductant to achieve lower reduction activity or increase reaction selectivity purpose. As lithium aluminum hydride reducing agent is characterized by : (a) reducing the scope, with the exception of non-carbon-carbon double bond, it almost can unsaturated group; (2) is obvious stereoselectivity, such as reduction are usually one-way from the side of the small offensive carbonyl. Take note is lithium aluminum hydride can be dramatic with water hydrolysis, reduction in absolute anhydrous conditions can be carried out, usually in the anhydrous ether or tetrahydrofuran inert solvent use.
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