C(N(CC)CC)C.Cl.[CH3:9][O:10][NH2:11].Cl[C:13]([C:15]1[C:16]([Cl:26])=[C:17]([CH:22]=[CH:23][C:24]=1[Cl:25])[C:18]([O:20][CH3:21])=[O:19])=[O:14]>ClCCl>[Cl:26][C:16]1[C:15]([C:13]([NH:11][O:10][CH3:9])=[O:14])=[C:24]([Cl:25])[CH:23]=[CH:22][C:17]=1[C:18]([O:20][CH3:21])=[O:19]20 4.60 g (0.045 mol) of triethylamine and 3.75 g (0.045 mol) of methoxyamine hydrochloride were added to a solution of 5.35 g (0.02 mol) of methyl 3-chlorocarbonyl-2,4-dichlorobenzoate and in 100 ml of dichloromethane. After the reaction solution had been stirred for 12 hours at room temperature, it was washed with dilute phosphoric acid, dried and concentrated. The resulting residue was extracted by stirring with diethyl ether. This gave 4.80 g of methyl 2,4-dichloro-3-(N-methoxy)aminocarbonylbenzoate.
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