Hydrochloric Acid → N-{[1-[(3,4-Dichlorophenyl)methyl]-6-hydroxy-2,4-dioxo-3-(phenylmethyl)-1,2,3,4-tetrahydro-5-pyrimidinyl]carbonyl}glycine

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A mixture of ethyl N-{[6-hydroxy-2,4-dioxo-3-(phenylmethyl)-1,2,3,4-tetrahydro-5-pyrimidinyl]carbonyl}glycinate (example 11a, 357 mg, 1.03 mmoles), 3,4-dichlorobenzyl bromide (193 uL, 1.13 mmoles) and sodium carbonate (330 mg, 3.1 mmoles) in dimethylformamide (6.0 mL) was stirred under argon at 100° C. for 2.5 hours. The mixture was cooled, poured into 1 molar hydrochloric acid and extracted with ethyl acetate (×2). The ester was hydrolysed by stirring in a mixture of ethanol (3 mL) and 1 molar sodium hydroxide solution (3 mL) for 3 hours. The mixture was acidified and extracted with ethyl acetate. Purification by preparative HPLC (acetonitrile-water—0.1% TFA, 20-100%) and crystallization from ethanol-water gave the title compound (50 mg, 10%). 1H NMR (400 MHz, DMSO-d6) δ ppm 13.13 (s, 1 H), 10.11 (t, J=5.68 Hz, 1 H), 7.59 (dd, J=5.18, 3.16 Hz, 2 H), 7.24-7.34 (m, 6 H), 5.01 (s, 2 H), 5.02 (s, 2 H), 4.14 (d, J=5.81 Hz, 2 H).

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