[H-].[Na+].[CH3:3][O:4][C:5]1[CH:10]=[CH:9][C:8]([N:11]=[CH:12][C:13]2[CH:18]=[CH:17][C:16]([OH:19])=[CH:15][CH:14]=2)=[CH:7][CH:6]=1.Br[C:21]([CH3:28])([CH3:27])[C:22]([O:24][CH2:25][CH3:26])=[O:23].O>CN(C)C=O>[CH3:3][O:4][C:5]1[CH:6]=[CH:7][C:8]([N:11]=[CH:12][C:13]2[CH:14]=[CH:15][C:16]([O:19][C:21]([CH3:28])([CH3:27])[C:22]([O:24][CH2:25][CH3:26])=[O:23])=[CH:17][CH:18]=2)=[CH:9][CH:10]=1(a) 2.38 g of 50% sodium hydride is suspended in 75 ml of anhydrous dimethylformamide, and 7.5 g of 4-[N-(4-methoxyphenyl)formimidoyl]phenol is added in four portions to the suspension at room temperature with stirring. Subsequently, 9.65 g of ethyl 2-bromo-2-methylpropionate is added dropwise to the resulting mixture at 20° to 25° C. over a period of about 40 minutes. The mixture is stirred at room temperature for 1 hour and then at 50° to 55° C. for 2 hours. The reaction mixture is poured into cold water, extracted with ether, and the extract is washed with 5% aqueous solution of sodium hydroxide until disappearance of the color of the aqueous layer, then washed with water and dried. After drying, the ether is distilled off to give 7.5 g of ethyl 2-[4-{N-(4-methoxyphenyl)formimidoyl}phenoxy]-2-methylpropionate in the form of an oil.
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