[OH:1][C:2]1[C:15]2[C:14](=[O:16])[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[S:7][C:6]=2[C:5]([OH:17])=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+].[CH3:24][N:25]([CH2:29][CH2:30]Cl)[CH2:26][CH2:27][Cl:28].Cl.O>CN(C)C=O>[Cl:28][CH2:27][CH2:26][N:25]([CH2:29][CH2:30][O:1][C:2]1[C:15]2[C:14](=[O:16])[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[S:7][C:6]=2[C:5]([OH:17])=[CH:4][CH:3]=1)[CH3:24]A solution of 0.5 g of 1,4-dihydroxythioxanthone in 20 ml of dimethylformamide is stirred for 0.5 h at room temperature with 6 g of potassium carbonate under anhydrous conditions. Mechlorethamine hydrochloride (0.4 g) is then added and the heterogeneous mixture was stirred for 12 h at 50° C. Water is added and the mixture extracted with ethyl acetate. The ethyl acetate solution is washed with water, dried with sodium sulfate, passed through a plug of alumina and concentrated under vacuum to produce 0.4 g (55%).
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