反应详情

A quantity of 6.16 g (0.027 mole) of 85% m-chloroperbenzoic acid was added to a solution of 6.6 g (0.03 mole) of 1-methyl-3-(methylsulfinyl)-4(1H)-cinnolinone in 100 ml of chloroform. The temperature rose to 45° C. After 5 minutes the solution was brought to reflux for 5 minutes, cooled, mixed with 200 ml of 5% sodium bicarbonate and stirred for 10 minutes. Additional chloroform (300 ml) was added to dissolve the separated product. The organic layer was separated, dried over anhydrous potassium carbonate and concentrated to give 6.7 g (94.4%) of white product melting at 202°-204°. Recrystallization from chloroform-methanol gave pure product melting at 204°-206° C.

1. customrose to 45° C
2. temperatureto reflux for 5 minutes
3. temperaturecooled
4. dissolutionto dissolve the separated product
5. customThe organic layer was separated
6. dry with materialdried over anhydrous potassium carbonate
7. concentrationconcentrated