反应详情

A mixture of dimethyl N-{2-[2-(2-pivaloylamino-4-hydroxypyrido[2,3-d]-pyrimidin-6-yl)ethynyl]-1-triphenylmethylimidazol-4-ylcarbonyl}-L-glutamate (390 mg, 0.5 mmol) and 10% palladium-on-carbon catalyst (390 mg) in methanol (15 mL) was stirred under 50 psi of hydrogen for 7 days at room temperature. The workup was performed as described in Example 2 to yield 130 mg (48%) of dimethyl N-{2-[2-(2-pivaloylamino-4-hydroxy-5,6,7,8-tetrahydropyrido[2,3-d]pyrimidin-6-yl)ethyl]imidazol-4-ylcarbonyl}-L-glutamate as a pale yellow solid, mp 129-131° C.: 1H NMR (CDCl3) δ 11.35 (br s, 1H), 8.95 (br s, 1H), 7.54 (d, 1H, J=8.4 Hz), 7.49 (s, 1H), 4.75 (m, 1H), 3.69 (s, 3H), 3.60 (s, 3H), 3.30 (M, 1H), 2.87 (m, 1H), 2.80-2.60 (m, 3H), 2.43 (m, 2H), 2.27 (m, 1H), 2.15-1.92 (m, 2H), 1.80-1.60 (m, 3H), 1.26 (s, 9H).