反应详情

温度

70 °C

To a solution of N-dodecyl-4-formyl-benzamide (Example 10, step a) (1.00 g, 3.115 mmol), acetic acid (0.227 g, 3.78 mmol) and 4-trifluoromethyl-phenylamine (0.609 g, 3.78 mmol) in DCE (25 mL) was added at once NaBH(OAc)3 (0.801 g, 3.78 mmol). The resulting mixture was stirred overnight at 70° C. A saturated solution of NaHCO3 (10 mL) was added to the reaction mixture, the aqueous layer was separated and extracted with DCM (3×50 mL). The combined organic layers were dried over MgSO4, filtered and concentrated to give a colorless oil. This crude product was purified by column chromatography over silica gel (4/1 c-Hex/AcOEt to 3/1 in about 0.5 h) to give the title compound as a colorless oil (0.824 g, 63%). 1H NMR (CD3OD, 300 MHz) δ 7.74 (d, 2H, J=8.3 Hz), 7.43 (d, 2H, J=8.3 Hz), 7.29 (d, 2H, J=8.7 Hz), 6.63 (d, 2H, J=8.3 Hz), 4.42 (s, 2H), 3.35 (m, 2H), 1.58 (m, 2H), 1.27 (m, 18H), 0.88 (m, 3H). M+(LC/MS(ESI)): 463.0; M−(LC/MS(ESI)): 461.3. HPLC (Condition A), Rt: 6.84 min (HPLC purity: 98.5%).

1. customthe aqueous layer was separated
2. extractionextracted with DCM (3×50 mL)
3. dry with materialThe combined organic layers were dried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated
6. customto give a colorless oil
7. customThis crude product was purified by column chromatography over silica gel (4/1 c-Hex/AcOEt to 3/1 in about 0.5 h)