Phase-transfer catalysis in reduction by lithium aluminium hydride

Abstract
Ketones, alky and aryl halides, nitriles, and amides undergo reduction with lithium aluminium hydride in the solid LiAlH4–hydrocarbon two-phase system in the presence of typical phase-transfer catalysts (crown ethers and quaternary ammonium salts), the reaction being characterized by good yields; solubilization of lithium aluminium hydride in non-polar solvents is demonstrated.

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