Vol. 28 ml. of absolute ethanol. The autoclave was then shaken under 1,000 lb. of hydrogen pressure at 100°for 1 hr.After filtration, the solution was concentrated in vacuo and the oily residue taken up in ether and separated into basic and neutral fractions. The basic fraction was converted to its hydrochloride salt and recrystallized from ethanol-ether to give 5.8 g. (50%) of analytically pure ethyl a-diphenvlmethyI-0-alaninate hydro-

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