[CH3:1][O:2][C:3]([NH:5][C:6]1C=C([CH:10]=[CH:11][CH:12]=1)N)=[O:4].C(I)C.C(=O)([O-])[O-].[Na+].[Na+].[CH2:22]([N:24]([CH2:28][CH3:29])[C:25](=O)[CH3:26])[CH3:23]>O>[CH3:1][O:2][C:3]([NH:5][C:6]1[CH:26]=[C:25]([CH:10]=[CH:11][CH:12]=1)[N:24]([CH2:22][CH3:23])[CH2:28][CH3:29])=[O:4]A mixture of 4.5 g of 3-(methoxycarbonylamino)-aniline, 21.6 g of ethyl iodide, 14.4 g of sodium carbonate, and 90 ml of N,N-diethylacetamide was stirred for 1 hour at 110° C. The reaction mixture obtained was poured into 300 ml of water followed by stirring well and extracted with ethyl acetate. The extract was washed with water, dried by Glauber's salt, and the solvent was distilled off using a rotary evaporator to provide 6.0 g (yield: 100%) of an oily product.
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