Hydrochloric Acid → 2-Chloro-6-cyclopropylimidazo[1,2-b]pyridazine-3-sulfonamide

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Reaction Conditions

Reaction Steps

N′-(2-Chloro-6-cyclopropylimidazo[1,2-b]pyridazin-3-ylsulfonyl)-N,N-diisobutylformamidine (0.93 g, 2.26 mmol) was dissolved in dioxane (9.00 mL), and 36% conc. hydrochloric acid (9.0 mL, 107 mmol) was added dropwise to the solution under stirring at 100° C. The mixture was stirred for 15 hours at 100 to 105° C., then left and cooled to room temperature and concentrated under reduced pressure until crystals occurred. Water (30.0 mL) was poured into the residues, and the crystals were completely precipitated, then filtered, washed with water and washed with methanol, to give the title compound as white crystals. The yield was 0.31 g (50.4%).

Provenance & Evidence