反应详情

To a mixture of Intermediate 8-1 (130 mg, 0.367 mmol), 1H-pyrazole-3,5-dicarboxylic acid (74.5 mg, 0.477 mmol), EDCl (91 mg, 0.477 mmol) and HOBt (64.5 mg, 0.477 mmol) in DMF (3 mL) is added triethylamine (149 mg, 0.203 mmol) and the mixture is stirred at room temperature for 18 hours. Any insoluble material is removed by filtration and the filtrate is chromatographed by HPLC using a gradient of 10% MeCN/water to 100% MeCN (+0.1% TFA). Lyophilization of the proper fractions gives the title compound; HPLC Retention time 1.31 minutes (condition C); MS 456.2 (M+1); 1H NMR (400 MHz, DMSO-d6) δ ppm 1.12 (t, J=7.07 Hz, 3H), 2.54-2.67 (m, 2H), 2.84-2.97 (m, 2H), 4.02 (q, J=7.07 Hz, 2H), 4.54 (m, 1H), 7.11 (s, broad, 1H), 7.32 (d, J=8.08 Hz, 2H), 7.39 (m, 1H), 7.46 (t, 1H), 7.62 (d, J=8.08 Hz, 3H), 7.69 (s, 1H), 8.41 (s, broad, 1H).

1. customAny insoluble material is removed by filtration
2. customthe filtrate is chromatographed by HPLC