To a stirred solution of 400 mg (1.15 mmol) 4-methoxy-N1,N1-bis-(4-methyl-benzyl)-benzene-1,3-diamine in 8 ml acetone was added dropwise a solution of 0.18 ml (1.34 mmol) benzoyl isothiocyanate in 4 ml acetone and stirring continued for 30 minutes at room temperature. The mixture was then diluted with ethyl acetate and washed with water and then with brine. The organic phase was dried over sodium sulfate and concentrated in vacuo. Flash chromatography (1/9 ethyl acetate/hexane) afforded 320 mg (80%) 1-benzoyl-3-{5-[bis-(4-methyl-benzyl)-amino]-2-methoxy-phenyl}-thiourea as a yellow oil. ES-MS m/e (%): 510 (M+H+, 100).
