Sodium Carbonate → 6-[3-(2-Chloromethyl-3-methylpyridin-4-ylsulfanyl)propylsulfanyl]-3-nitroimidazo[1,2-b]pyridazine

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of 3.6 ml (49.8 mmol) of thionyl chloride in 30 ml of dichloromethane is added dropwise at room temperature to a solution of 15.0 g (38.3 mmol) of {3-methyl-4-[3-(3-nitroimidazo[1,2-b]pyridazin-6-yl-sulfanyl)propylsulfanyl]pyridin-2-yl}methanol in 400 ml of anhydrous dichloromethane and the mixture is then stirred for a further 18 h. It is then cooled to 0° C. and aqueous sodium carbonate solution (100 ml) is cautiously added dropwise. The dichloromethane is distilled off. The suspension is then treated with 400 ml of water and stirred at 0° C. for 30 min. The precipitate is filtered off, washed with water, dried at 40° C. in vacuo and then suspended in 300 ml of acetone. After filtration and drying, 15.3 g (97%) of the title compound are isolated as a beige powder. M.p.: 155-156° C.

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