Abstract

Lithium aminoborohydrides (LiABH 3), obtained by the reaction of n-BuLi with amine-boranes, are powerful reducing agents, comparable to lithium aluminum hydride, yet selective in their reducing properties. LiABH 3's reduce esters, lactones, and anhydrides to the corresponding alcohols, while carboxylic acids are not reduced. Test reductions show that LiABH 3's also reduce a wide range of functional groups, including amides, epoxides, oximes, nitriles, and halides.

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