反应详情

Intermediate 1E was prepared (as described below for the preparation of intermediate 2B) from 4.08 g of benzamide, 5.0 g of ethyl 3-bromo-2-oxo-pentanoate, and 10 mL of toluene. Solids were collected and washed with cold water after cooling of the NaOH solution. Heating these solids with citric acid as described followed by cooling and isolation of the resulting solids gave 410 mg (9% yield) of the title compound; 1H NMR (CDCl3, 300 MHz) δ8.06-8.03 (m, 2H), 7.49-7.43 (m, 3H), 3.14 (q, 2H, J=8.0), 1.34 (t, 3H, J=8.0); low resolution MS (ES+)m/e 217.8 (MH+).

1. customIntermediate 1E was prepared (
2. customSolids were collected
3. washwashed with cold water
4. temperatureafter cooling of the NaOH solution
5. temperatureHeating these solids with citric acid
6. temperatureby cooling