Diethyl Pyrocarbonate → 4-(Benzyloxycarbonylaminomethyl)benzoyl-glutamic acid di-t-butyl ester

Beteiligte Stoffe

Reaktionsschritte

To a solution of 4-(benzyloxycarbonylaminomethyl)benzoic acid as obtained in Reference Example 35 (1.0 g), glutamic acid di-t-butyl ester hydrochloride (1.15 g) and DEPC (860 mg) in dimethylformamide (20 ml), triethylamine (1.06 g) was added drop by drop, followed by stirring at room temperature for 1 hour. After solvent concentration under reduced pressure, the resulting residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=2:1) to yield the title compound (1.86 g, yield 100%) as a colorless wax-like substance.

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