反应详情

To a suspension of 12-acetyl-5,6-diacetoxy-12H-benzo[a]phenothiazine (450 mg) in acetone (10 ml) there was added 2N aqueous sodium hydroxide solution (10 ml) and the resulting mixture was stirred at room temperature for 45 minutes. It was then made slightly acidic by the addition of 10% aqueous acetic acid solution and the insolubles filtered and washed with water. The solid was swished in ethyl acetate to afford pure title compound (100 mg), m.p. 258°-260° C.

1. filtrationthe insolubles filtered
2. washwashed with water