反应详情

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0 °C

1N H2SO4 (2 mL) was added to 1-benzothiazol-6-yl-3-(2,2-dimethoxy-ethyl)-urea (I-142a: 300 mg) and the resulting mixture was stirred at 0° C. for 30 minutes. The reaction mixture was heated to 50° C. for 2 hours. The reaction was monitored by TLC (10% MeOH in CHCl3). The reaction mixture was cooled to 0° C. and basified with 10% KOH solution. The precipitate was collected, washed with water and dried under reduced pressure to afford 170 mg of 1-Benzothiazol-6-yl-1,3-dihydro-imidazol-2-one (73.59% yield).

1. temperatureThe reaction mixture was heated to 50° C. for 2 hours
2. customThe precipitate was collected
3. washwashed with water
4. customdried under reduced pressure