反应详情

温度

80 °C

To a solution of Step 1 intermediate from Intermediate 10 (500 mg, 1.932 mmol) in DMF (5 ml) was added cyclopropylmethyl bromide (0.313 g, 2.321 mmol) at room temperature followed by Cs2CO3 (1.88 g, 5.770 mmol) and the reaction temperature was heated to 80° C. for 15.0 h overnight. The reaction mixture was diluted with ethyl acetate, washed with water and brine and purified by column chromatography using 1% methanol in chloroform to afford the desired compound; 1H NMR (300 MHz, CDCl3) δ 0.35-0.37 (m, 2H), 0.59-0.61 (m, 2H), 1.01-1.03 (m, 1H), 2.19 (s, 3H), 3.80-3.85 (m, 2H), 7.09-7.11 (m, 2H), 7.26-7.29 (m, 2H), 7.52 (d, J=4.8 Hz, 1H), 7.97 (d, J=4.5 Hz, 1H); MS (m/z) 313.25 (M+H)+.

1. washwashed with water and brine
2. custompurified by column chromatography