反应详情

The product of Step 1 (6.4 g, 0.026 mol) was heated in SOCl2 (30 mL) at reflux for 2 h. The excess reagent was then evaporated and chased with toluene (2×10 mL). The residue was dissolved in dry CH2Cl2 (20 mL) and added dropwise to a solution of 4-(dimethylamino)pyridine (3.2 g, 0.026 mol) and 4-aminobenzotrifluoride (4.3 g, 0.026 mol) in CH2Cl2 (40 mL) cooled in ice. When addition was complete (10 min), the mixture was stirred and warmed to room temperature over 1 h, then washed with 2N HCl (15 mL), 2N Na2CO3 solution (15 mL), brine (10 mL), dried (MgSO4) and concentrated to give 8.4 g (84% yield) of product as a buff solid. 1H NMR (360 MHz, CDCl3): 7.40 (1H, d, J 1.4 Hz), 7.44 (1H, dd, J 1.4 and 8.5 Hz), 7.63 (2H, d, J8.5 Hz), 7.80 (2H, d, J 8.5 Hz), 8.14 (1H, d, J 8.5 Hz).

1. temperatureat reflux for 2 h
2. customThe excess reagent was then evaporated
3. dissolutionThe residue was dissolved in dry CH2Cl2 (20 mL)
4. temperaturecooled in ice
5. additionWhen addition
6. custom(10 min)
7. washwashed with 2N HCl (15 mL), 2N Na2CO3 solution (15 mL), brine (10 mL)
8. dry with materialdried (MgSO4)
9. concentrationconcentrated