ИСТИНА

The present invention discloses method for prepg. borohydride amine salt. The method comprises dissolving amine salt and Lewis acid in an org. solvent, adding silane, stirring at room temp., pptg. with n-hexane, filtering, washing the ppt. with n-hexane, filtering, and vacuum-drying. The Lewis acid is one of tris(pentafluorophenyl)boron, tris(tetrafluorophenyl)boron, tris(trifluorophenyl)boron, tris(difluorophenyl)boron, tris(fluorophenyl)boron, and tri-Ph boron. Said amine salt is one of triethylamine hydrochloride, tert-butylamine hydrochloride, diethylamine hydrochloride, di-n-butylamine hydrochloride, tri-n-butylamine hydrochloride, isopropylamine hydrochloride, diisopropylamine hydrochloride, cyclohexylamine hydrochloride, and 2,2,6,6-tetramethylpiperidine hydrochloride. Said saline is one of silicon hydride, Ph silane, di-Ph silane, tri-Et silane, dichlorosilane, trichlorosilane, and triethoxysilane. In the prepn., the selection range for amine salt is wide. The method can prep. borohydride amine salt that cannot be prepd. limited by Lewis acid-base pair system, at high yield. Said borohydride amine salt is applied in catalytic hydrogenation reaction in org. synthesis, and the substrate for catalytic hydrogenation may be alkene, alkyne, carbonyl-contg. compds., carboxylic acids and derivs. thereof, amines, alkenyl amines, nitriles, enol, carbon dioxide, nitric oxide, etc. contg. unsatd. bond.