[O:1]=[C:2]([C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=1[NH:10][C:11](=[O:13])[CH3:12])[CH3:3].CO[CH:16](OC)[N:17]([CH3:19])[CH3:18]>C1(C)C=CC=CC=1>[CH3:16][N:17]([CH3:19])[CH:18]=[CH:3][C:2]([C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=1[NH:10][C:11](=[O:13])[CH3:12])=[O:1]A suspension of 48 g of N-[2-(1-oxo-1-ethanyl)phenyl]acetamide and 38 g of N,N-dimethylformamide dimethyl acetal in 150 ml of toluene was heated at reflux for about 16 hours, then concentrated in vacuo to a solid. The solid was recrystallized from 1-chlorobutane to yield 40 g of the title compound; m.p. 90°-95° C.
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