Reaction equation
CO.B(F)(F)F.C([NH:10][C:11]1[C:12]([F:32])=[CH:13][C:14]([Cl:31])=[C:15]([CH:30]=1)[O:16][C:17]1[CH:29]=[CH:28][CH:27]=[CH:26][C:18]=1[O:19][CH2:20][C:21]([O:23][CH2:24][CH3:25])=[O:22])(=O)C>>[NH2:10][C:11]1[C:12]([F:32])=[CH:13][C:14]([Cl:31])=[C:15]([CH:30]=1)[O:16][C:17]1[CH:29]=[CH:28][CH:27]=[CH:26][C:18]=1[O:19][CH2:20][C:21]([O:23][CH2:24][CH3:25])=[O:22]Participants
3
Procedure
Into a boron trifluoride methanol complex methanol solution is added ethyl [2-(5-acetylamino-2-chloro-4-fluorophenoxy)phenoxy]acetate, and the mixture is heated while stirring. Thereafter, the reaction solution is concentrated, the residue is dissolved in ethyl acetate, and washed with saturated aqueous sodium bicarbonate, dried over magnesium sulfate, and concentrated to obtain ethyl [2-(5-amino-2-chloro-4-fluorophenoxy)phenoxy]acetate [Intermediate compound A3-23].
Workup
- temperaturethe mixture is heated
- concentrationThereafter, the reaction solution is concentrated
- dissolutionthe residue is dissolved in ethyl acetate
- washwashed with saturated aqueous sodium bicarbonate
- dry with materialdried over magnesium sulfate
- concentrationconcentrated
Sources & evidence
- ORD record
- ord-33db2df52e6946c8b20f6fd6038ad6ce
- Source dataset
- uspto-grants-2003_12
- Patent number
- US06667413B2
Linked notes
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