反应详情

According to General Procedure B, a mixture of 4-chloro trifluoromethylbenzene (67 μL, 0.50 mmol), morpholine (52 μL, 0.60 mmol), NaOt-Bu (67 mg, 0.70 mmol), Pd2(dba)3.CHCl3 (10 mg, 0.01 mmol) and 12f (8 mg, 0.02 mmol) in PhMe (2.5 mL) was heated, cooled and filtered. Evaporation of the solvent under reduced pressure and column chromatography of the pre-adsorbed crude material (20% Et2O in hexane, silica gel) gave 52a (89 mg, 77%) as off-white crystals. 1H NMR (300 MHz, CDCl3) δ 7.50 (d, 2H, J=8.7 Hz), 6.92 (d, 2H, J=8.7 Hz), 3.87 (t, 4H, J=4.8 Hz), 3.24 (t, 4H, J=5.1 Hz); 13C NMR (75.5 MHz, CDCl3) δ 153.3, 126.4 (q, J=3 Hz), 124.6 (q, J=271 Hz), 120.9 (q, J=33 Hz) 114.3, 66.6, 48.1.

1. temperaturecooled
2. filtrationfiltered
3. customEvaporation of the solvent under reduced pressure and column chromatography of the pre-adsorbed crude material (20% Et2O in hexane, silica gel)