[CH3:1][NH:2][CH3:3].Cl[C:5]([C:7]1[CH:16]=[CH:15][C:10]([C:11]([O:13][CH3:14])=[O:12])=[CH:9][CH:8]=1)=[O:6]>C1COCC1>[CH3:1][N:2]([CH3:3])[C:5]([C:7]1[CH:16]=[CH:15][C:10]([C:11]([O:13][CH3:14])=[O:12])=[CH:9][CH:8]=1)=[O:6]2.2 30 ml of a 40% dimethylamine solution in 200 ml of THF are initially introduced. 20 g of methyl 4-chlorocarbonylbenzoate are dissolved in 300 ml of THF and added dropwise, and the mixture is stirred at room temperature for a further 2 hours. The solvent is removed, and the mixture is subjected to conventional work-up, giving 19.2 g of methyl 4-(N,N-dimethylaminocarbonyl)benzoate (“BB”), m.p. 107°.
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