4-Methoxybenzenesulfonyl chloride → HCID 10506281, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 1.40 g (3.94 mmol) of 4-(aminomethyl) -1-[[2-(diethylamino) ethyl]amino]-thioxanthen-9-one (prepared by the method described in Example 4) in 30 mL of chloroform containing 1.5 mL of triethylamine was cooled to 0° C. and treated with p-methoxybenzenesulfonyl chloride (0.83 g, 4.02 mmol). After 10 min at 0° C. the reaction mixture was stirred at room temperature for 2 h. Chloroform was removed in vacuo, the residue dissolved in 100 mL of methylene chloride containing 1 mL of triethylamine and treated with additional p-methoxybenzenesulfonyl chloride (0.85 g) with stirring at room temperature. The mixture was concentrated in vacuo, the residue was purified by passing through a pad of silica gel (1% triethylamine/chloroform) affording 1.57 g of N-[[1-[[2-(diethylamino)ethyl]amino]-9-oxothioxanthen-4-yl]methyl]-p-methoxy-benzenesulfonamide. The sulfonamide was treated with methanesulfonic acid (0.3 g) in isopropanol/isopropyl acetate/methanol to afford 1.07 g of the methanesulfonate salt, m.p. 133°-137° C.

Provenance & Evidence