Hydrochloric Acid → HCID 66617023, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 5-chloro-N-[(5-chloro-2-thienyl)sulfonyl]-N-[1-[(3-cyanophenyl)methyl]-6-fluoro-4-(methyloxy)-1H-indazol-3-yl]-2-thiophenesulfonamide (for a preparation see Intermediate 53) (53 mg, 0.08 mmol) in methanol (10 mL) was treated with 2M NaOH solution (1 mL) was heated to 60° C. under nitrogen overnight. More 2M NaOH solution (0.5 mL) was added and the mixture was heated to 71° C. over the weekend. The mixture was allowed to cool to RT and then treated with 2M HCl solution to pH 0. The mixture was extracted with ethyl acetate and the organic solution was washed with 2M HCl, brine, dried (MgSO4) and evaporated to a gum 54 mg. The residue was dissolved in 1:1 MeOH-DMSO 1 mL and purified by Mass Directed AutoPrep on Sunfire C18 column using Acetonitrile Water with a Formic acid modifier (Method A) collecting fractions with RT=7.77 min 19% and 8.73 min, 81%). The solvent was evaporated in vacuo from the major fraction (RT=8.73 min) to give 3-{[3-{[(5-chloro-2-thienyl)sulfonyl]amino}-6-fluoro-4-(methyloxy)-1H-indazol-1-yl]methyl}benzoic acid (26 mg, 65%), as a white solid: LCMS (System A) RT=1.04 min, ES+ve m/z 496/498 (M+H)+ for carboxylic acid product. The minor component (RT=7.77 min) was evaporated under reduced pressure to give the title compound (6.2 mg, 15%) as a white solid: LCMS (System A) RT=0.97 min, ES+ve m/z 495/497 (M+H)+.

Provenance & Evidence