[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([NH2:9])=[CH:5][CH:4]=1.[CH3:10][N:11]([CH3:21])[C:12]1[CH:20]=[CH:19][C:15]([C:16](Cl)=O)=[CH:14][CH:13]=1.P12(SP3(SP(SP(S3)(S1)=S)(=S)S2)=S)=[S:23]>N1C=CC=CC=1>[CH3:10][N:11]([CH3:21])[C:12]1[CH:20]=[CH:19][C:15]([C:16](=[S:23])[NH:9][C:6]2[CH:7]=[CH:8][C:3]([O:2][CH3:1])=[CH:4][CH:5]=2)=[CH:14][CH:13]=113.6 g of p-anisidine were added to a solution of 22.2 g of 4-dimethylamino-benzoic acid chloride in 84 ml of anhydrous pyridine and the mixture was refluxed for one hour and cooled to 30° C. 33 g of phosphorus pentasulfide were added to the mixture which was refluxed for 2 hours and was then poured into an ice water-concentrated hydrochloric acid mixture. The mixture was stirred for one hour and was vacuum filtered and the product was washed with 0.1N hydrochloric acid. A mixture of the product and 300 ml of N sodium hydroxide solution was stirred for one hour and was vacuum filtered. The product was washed with water and dried to obtain 13.5 g of 4-dimethylamino-N-(4'-methoxyphenyl)-benzenecarbothiamide melting at 192° C.
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