反应详情

To a solution of the product of Example 50, Step A (28 mg, 0.141 mmol) and TEA (23 μL, 0.169 mmol) in CHCl3 (1 mL) cooled to 0° C. was added 2,2-difluoro-1,3-benzodioxole-4-carbonyl chloride (34 mg, 0.155 mmol). The reaction was warmed to room temperature and stirred overnight. The crude reaction mixture purified on 12 g SiO2 column with 0-4% NH3/MeOH CH2Cl2 to give the desired compound (43 mg, 80%). MS (ESI): mass calcd. for C20H15F2N3O3, 383.1. m/z found, 384.0 [M+H]+. 1H NMR (400 MHz, CDCl3) δ 7.71-7.39 (m, 4H), 7.36-7.09 (m, 5H), 4.88 (s, 1H), 4.58 (t, J=1.6 Hz, 2H), 4.08 (t, J=5.9 Hz, 2H), 3.66 (t, J=5.6 Hz, 1H), 2.86-2.74 (m, 3H).

1. customThe crude reaction mixture
2. custompurified on 12 g SiO2 column with 0-4% NH3/MeOH CH2Cl2