反应详情

To a solution of 2-chloro-6-(isopropylamino)benzaldehyde (1.1 g, 5.57 mmol, step 3) in methanol (10 mL) was added ethylenediamine (0.186 mL, 2.78 mmol) and acetic acid (0.319 mL, 5.57 mmol). Meldrum's acid (1.6 g, 11.1 mmol) was added to the mixture at 0° C. Then, the mixture was stirred at room temperature for 16 h. The formed precipitate was filtrated and washed with methanol. The filtrate was evaporated and crystallized from methanol to give 200 mg (14%) of the title compound as a white solid.

1. filtrationThe formed precipitate was filtrated
2. washwashed with methanol
3. customThe filtrate was evaporated
4. customcrystallized from methanol