Propanoic acid, 3-hydroxy-, phenylmethyl ester → HCID 70362518, compound

Participants

Reaction Steps

To a solution of O-benzyl-N-benzyloxycarbonyl-L-threonine (1.15 g), benzyl 3-hydroxypropionate (604 mg) and 4-N,N-dimethylaminopyridine (41 mg) in methylene chloride (20 ml) was added N,N-diethylaminopropyl-N'-ethylcarbodiimide hydrochloride (641 mg) at 0° C. The reaction mixture was allowed to warm to room temperature and stirred at room temperature for an hour. The reaction mixture was concentrated and the residue was diluted with ethyl acetate and washed successively with 0.1 N hydrochloric acid, water, 10% aqueous sodium hydrogen carbonate, water and brine. After drying over sodium sulfate, the ethyl acetate extract was filtered and concentrated. The residue was chromatographed on silica gel eluting successively with a 1:1 mixture of methylene chloride and hexane, methyl chloride and a 50:1 mixture of methylene chloride and acetone to give 2-benzyloxycarbonylethyl O-benzyl-N-benzyloxycarbonyl-L-threonine (1.1 g).

Provenance & Evidence