Hydrochloric Acid → 1-Butanesulfonamide, 2-ethyl-2-(((7-methyl(1,2,4)triazolo(1,5-b)pyridazin-6-yl)oxy)methyl)-

Beteiligte Stoffe

Reaktionsschritte

To a solution of 1.38 g of 3-(N,N-dimethylamino-methylene)aminosulfonyl-2,2-diethyl-1-propanol in 30 ml of tetrahydrofuran was added 0.23 g of 60% sodium hydride in oil and the mixture was stirred at room temperature for 1 hour. To this reaction mixture was added 0.74 g of 6-chloro-7-methyl[1,2,4]triazolo[1,5-b]pyridazine and the mixture was refluxed with stirring for 1 hour. After cooling, the reaction mixture was adjusted to pH 6 with 1N-hydrochloric acid and extracted with ethyl acetate-tetrahydrofuran (1:1). The extract was washed with water and dried and the solvent was distilled off. To the residue was added 14 ml of 6N-hydrochloric acid and the mixture was stirred at 110° C. for 30 minutes. After cooling, 100 ml of water was added to the reaction mixture and the resulting crystals were recovered by filtration and recrystallized from methanol to provide 1.16 g of the title compound. m.p. 208°-209° C.

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