反应详情

1-Pyrimidin-2-yl-1,2,3,6-tetrahydropyridine-4-carboxylic acid (55.0 mg, 0.27 mmol) and a catalytic amount of DMF were combined in CH2Cl2 (1.5 mL) and treated with (COCl)2 (0.033 mL, 0.38 mmol). The mixture was stirred for 90 minutes, diluted with toluene (0.5 mL), and concentrated to dryness under reduced pressure. The residue in CH2Cl2 (1.5 mL) was treated with pyridine (0.033 mL, 0.41 mmol), catalytic amount of DMAP, and 4-chloroaniline (41.0 mg, 0.32 mmol). The mixture was stirred for 1 hour, diluted with water, and extracted with CH2Cl2. The organic phase was dried (Na2SO4), filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by flash chromatography (15% ethyl acetate/CH2Cl2) to provide the title compound. 1H NMR (300 MHz, CDCl3) δ 8.35 (d, 2H), 7.51 (d, 2H), 7.39 (brs, 1H), 7.31 (d, 2H), 6.77 (sept, 1H), 6.54 (t, 1H), 4.43 (q, 2H), 4.03 (t, 2H), 2.58 (m, 2H); MS (m/z) 315.

1. concentrationconcentrated to dryness under reduced pressure
2. stirringThe mixture was stirred for 1 hour
3. extractionextracted with CH2Cl2
4. dry with materialThe organic phase was dried (Na2SO4)
5. filtrationfiltered
6. concentrationthe filtrate was concentrated under reduced pressure
7. customThe residue was purified by flash chromatography (15% ethyl acetate/CH2Cl2)