Hydrochloric Acid → 5-Chloro-4-[(6-chloro-2'-fluoro-4-pyridazin-4-ylbiphenyl-3-yl)oxy]-2-fluoro-N-1,3,4-thiadiazol-2-ylbenzenesulfonamide

Hydrogen chloride in dioxane (4M, 1.5 mL, 6.00 mmol) was added to a solution of 5-chloro-4-(6-chloro-2′-fluoro-4-(pyridazin-4-yl)biphenyl-3-yloxy)-N-(2,4-dimethoxybenzyl)-2-fluoro-N-(1,3,4-thiadiazol-2-yl)benzenesulfonamide (Preparation 92, 220 mg, 0.27 mmol) in methanol (1.5 mL) and the reaction stirred at room temperature for 18 hours. The mixture was evaporated to dryness and dissolved in dimethylsulfoxide (4.0 mL) and methanol (2.0 mL). The resulting precipitate was filtered, washed with methanol (2.0 mL) and the filtrate purified by preparative HPLC using a Phenomenex Luna C18 5 u 110 A 21.2×150 mm using acetonitrile:water as eluent to give the title compound (92 mg, 56%) as a beige coloured solid.

1. customThe mixture was evaporated to dryness
2. dissolutiondissolved in dimethylsulfoxide (4.0 mL)
3. filtrationThe resulting precipitate was filtered
4. washwashed with methanol (2.0 mL)
5. customthe filtrate purified by preparative HPLC

ORD record

ord-79e441789e53422fb72c789f66e0d7f0

Source dataset

uspto-grants-2014_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08772293B2