反应详情

To a solution of N-(2,6-dichloro-3,5-dimethoxy-phenyl)-acetamide (34.5 g, 264 mmol) in ethanol (1.3 L), 2M KOH (0.72 L) is added. Then, the reaction mixture is heated to reflux, stirred for 44 h at reflux, then allowed to cool to RT. The resulting suspension is cooled to 0° C. stirred for 1 h, and filtered. The residue is washed with a small portion of cold EtOH/H2O (1:1) and with cold H2O till neutrality, and dried to provide the title compound as a white solid: ESI-MS: 222.0/224.0 [MH]+, TLC: Rf=0.52 (Hex/EtOAc, 1:1).

1. temperatureThen, the reaction mixture is heated
2. temperatureto reflux
3. temperatureat reflux
4. temperatureThe resulting suspension is cooled to 0° C.
5. stirringstirred for 1 h
6. filtrationfiltered
7. washThe residue is washed with a small portion of cold EtOH/H2O (1:1) and with cold H2O till neutrality, and
8. customdried