N1([C:7](=[N:9][NH:10][C:11]2[CH:16]=[CH:15][C:14]([N+:17]([O-:19])=[O:18])=[CH:13][CH:12]=2)[CH3:8])CCOCC1.[N:20]([CH2:23][CH2:24][CH3:25])=[C:21]=[O:22]>CN(C)C1C=CN=CC=1.ClCCl>[CH3:8][C:7]1[N:20]([CH2:23][CH2:24][CH3:25])[C:21](=[O:22])[N:10]([C:11]2[CH:12]=[CH:13][C:14]([N+:17]([O-:19])=[O:18])=[CH:15][CH:16]=2)[N:9]=1A mixture of 13 parts of 1-[1-(4-morpholinyl)ethylidene-2-(4-nitrophenyl)hydrazine, 8.5 parts of 1-isocyanatopropane, 1 part of N,N-dimethyl-4-pyridinamine and 39 parts of dichloromethane was stirred and refluxed for 2 hours. The whole was evaporated and 90 parts of dimethylbenzene were added to the residue. Stirring at reflux was continued for 3 hours. The reaction mixture was cooled and filtered over diatomaceous earth. The filtrate was saturated with petroleum ether. The precipitated product was filtered off and crystallized from 2-propanol, yielding 8.5 parts (65%) of 2,4-dihydro-5-methyl-2-(4-nitrophenyl)-4-propyl-3H-1,2,4-triazol-3-one; mp. 125.4° C. (int. 20).
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