反应详情

(R)-(3-{4-[(6-Cyano-pyridin-2-ylmethyl)-(4-methoxy-phenyl)-amino]-piperidin-1-yl}-butyl)-carbamic acid tert-butyl ester (0.070 g, 0.14 mmol) was dissolved in a 3:1 mixture of CH2Cl2 and TFA and the mixture was stirred at room temperature for 1 h. The solvent was removed in vacuo and the resulting brown oil dried in vacuo (high vacuum system) for 2 h. The resulting amine, EDCI (0.030 g, 0.16 mmol) and HOBT (0.021 g, 0.16 mmol) were combined in DMF (5 mL) to give a pale yellow solution. To this solution was added 6-cyano-2,4-dimethyl-nicotinic acid hydrochloride (0.033 g, 0.16 mmol) followed by DIPEA (163 μL, 0.94 mmol) and the resulting mixture was stirred at 25° C. for 16 h. Standard workup according to General Procedure C gave the crude product as a tan oil. Purification by column chromatography on silica gel (Et2O:MeOH:NH4OH, 90:8:2, v/v/v) afforded 6-cyano-N-((R)-3-{4-[(6-cyano-pyridin-2-ylmethyl)-(4-methoxy-phenyl)-amino]-piperidin-1-yl}-butyl)-2,4-dimethyl-nicotinamide (0.041 g, 52%) as a white foam. 1H NMR (CDCl3) δ 0.89 (m, 1H), 0.99 (d, 3H, J=6.0 Hz), 1.08 (m, 1H), 1.53 (m, 1H), 1.74 (m, 3H), 2.11 (br t, 1H), 2.41 (s, 3H), 2.51 (br t, 1H), 2.57 (s, 3H), 2.72 (m, 1H), 2.84 (m, 2H), 3.29-3.38 (m, 2H), 3.73 (s, 3H), 3.84 (m, 1H), 3.97 (s, 2H), 6.65 (d, 2H, J=9.0 Hz), 6.77 (d, 2H, J=9.0 Hz), 7.46 (d, 1H, J=6.0 Hz), 7.52 (s, 1H), 7.53 (d, 1H, J=9.0 Hz), 7.73 (t, 1H, J=9.0 Hz), 8.56 (br s, 1H). ES-MS m/z 552 (M+H), 574 (M+Na). Anal. Calcd. for C32H37N7O2.0.2 CH2Cl2: C, 68.01; H, 6.63; N, 17.24. Found: C, 67.79; H, 6.69; N, 17.11.

1. customThe solvent was removed in vacuo
2. customthe resulting brown oil dried in vacuo (high vacuum system) for 2 h
3. customto give a pale yellow solution
4. stirringthe resulting mixture was stirred at 25° C. for 16 h
5. customgave the crude product as a tan oil
6. customPurification by column chromatography on silica gel (Et2O:MeOH:NH4OH, 90:8:2, v/v/v)