[CH:1]([C:4]1[CH:22]=[CH:21][C:7]([CH2:8][CH2:9][O:10][C:11]2[CH:16]=[CH:15][C:14]([NH:17][C:18](Cl)=[O:19])=[CH:13][CH:12]=2)=[CH:6][CH:5]=1)([CH3:3])[CH3:2].N1C=CC=CC=1.[CH3:29][NH:30][O:31][CH3:32]>C1(C)C=CC=CC=1>[CH:1]([C:4]1[CH:22]=[CH:21][C:7]([CH2:8][CH2:9][O:10][C:11]2[CH:16]=[CH:15][C:14]([NH:17][C:18](=[O:19])[N:30]([O:31][CH3:32])[CH3:29])=[CH:13][CH:12]=2)=[CH:6][CH:5]=1)([CH3:3])[CH3:2]Into a solution of 10.6 g of 4-(4-isopropylphenethyloxy)phenylcarbamyl chloride in 200 ml of toluene are added 4 ml of pyridine and a solution of 2.5 g of N,O-dimethylhydroxylamine in 50 ml of toluene at a temperature below 20° C. The mixture is heated under reflux for 4 hours. The reaction mixture is then poured into ice water, and the separated organic layer is washed with dilute hydrochloric acid, thoroughly washed with water and dried over anhydrous sodium sulfate. The solvent is removed under reduced pressure, and the crude crystals are recrystallized from ethanol to obtain 4.8 g of N'-[4-(4-isopropylphenethyloxy)phenyl]-N-methoxy-N-methylurea as white needles, M.P. 81°-82° C.
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