反应详情

温度

60 °C

N-{[3-Cyclohexyl-6-hydroxy-2,4-dioxo-1-(3-piperidinyl)-1,2,3,4-tetrahydro-5-pyrimidinl]carbonyl}glycine hydrobromide. Phenylmethyl 3-[3-cyclohexyl-5-({[2-(ethyloxy)-2-oxoethyl]amino}carbonyl)-6-hydroxy-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl]-1-piperidinecarboxylate (1.2 g, 2.15 mmoles) was stirred in a mixture of acetic acid (30 mL) and 48% hydrobromic acid (5.0 mL) for 40 hours—reaction incomplete. The mixture was then heated at 60° C. for 2 hours, diluted with water and extracted with ethyl acetate (×5). The combined extracts were dried and evaporated, and recrystallized from diethyl ether-hexane to give the title compound (160 mg, 20%). 1H NMR (400 MHz, DMSO-d6) δ ppm 12.84 (br. s., 1 H), 10.11 (s, 1H), 8.86 (s, 1 H), 5.12 (s, 1 H), 4.63 (t, J=12.00 Hz, 1 H), 4.09 (s, 2 H), 3.66 (t, J=11.37 Hz, 1 H), 3.28 (d, J=10.61 Hz, 2 H), 2.77 (t, J=11.12 Hz, 1 H), 2.36 (dd, J=12.38, 3.54 Hz, 1 H), 2.22-2.32 (m, 2 H), 1.89 (d, J=12.63 Hz, 1 H), 1.69-1.81 (m, 4 H), 1.55-1.67 (m, 4 H), 1.27 (q, J=12.88 Hz, 2 H), 1.11 (q, J=12.97 Hz, 1 H)

1. customreaction incomplete
2. extractionextracted with ethyl acetate (×5)
3. customThe combined extracts were dried
4. customevaporated
5. customrecrystallized from diethyl ether-hexane