反应详情

To a stirred solution of the acid (R)-2-(4-(1,2-dihydro-2-oxoquinazolin-3(4H)-yl)piperidine-1-carboxamido)-3-(2-(trifluoromethyl)-1H-benzo[d]imidazol-5-yl)propanoic acid (33 mg, 0.06 mmol) and diisopropylethylamine (33 mg, 0.25 mmol) in methylene chloride (2 mL) was added a solution of PyBOP (33 mg, 0.06 mmol) and 4-piperidinopiperidine (12 mg, 0.07 mmol) in methylene chloride (1 mL). The reaction mixture was stirred at room temperature for 16 h and was subjected to preparative thin layer chromatography for purification (1:10 2M ammonia in methanol/methylene chloride) to give the title compound (4.6 mg, 12% yield). 1H-NMR (CD3OD, 500 MHz) δ 7.73-7.71 (m, 1H), 7.62 (bs, 1H), 7.39-7.36 (m, 1H), 7.19-7.11 (m, 2H), 6.96 (t, J=7.2 Hz, 1H), 6.81 (d, J=7.9 Hz, 1H), 5.06-5.02 (m, 1H), 4.67-4.58 (m, 1H), 4.49-4.40 (m, 1H), 4.38 (s, 1H), 4.33 (bs, 1H), 4.25-4.16 (m, 2H), 4.10-4.03 (m, 1H), 3.22-3.14 (m, 3H), 3.04-2.87 (m, 4H), 2.79-2.71 (m, 1H), 2.58-2.48 (m, 1H), 2.44-2.33 (m, 1H), 2.31-2.22 (m, 1H), 2.04-1.92 (m, 1H), 1.86-1.43 (m, 11H), 1.33-1.29 (m, 1H), 0.94-0.84 (m, 1H), −0.04-−0.12 (m, 1H). LC/MS: tR=1.97 min, 681 (MH)+.

1. customwas subjected to preparative thin layer chromatography for purification (1:10 2M ammonia in methanol/methylene chloride)