Hydrochloric Acid → 4-(5-bromo-1-methyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester hydrochloride

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Reaction Steps

A solution of N-[(1,1-dimethylethoxyl)carbonyl]-4-(5-bromo-1-methyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester (135 mg, 0.29 mmol) in 4 N HCl in dioxane (5 mL) was stirred for 2 hr and was concentrated. The residue was triturated with several portions of ether to give 4-(5-bromo-1-methyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester hydrochloride (120 mg, quant) as a white powder. LRMS-Electrospray: m/z positive ion 729, 2M+H (2 Br), 406 (M+H+CH3CN), 397 (M+H+CH3CN (1 Br)), 365 (M+H (1 Br)). HRMS: Obs. Mass 365.0504. Calcd. Mass 365.0501 (M+H).

Provenance & Evidence