Lithium Hydroxide → HCID 69689647, compound

Participants

Reaction Steps

Methyl 4-[[4-[4-(aminosulfonyl)phenyl]-3-phenylisoxazol-5-yl]methoxy]benzoate (Example 50) (65.0 mg, 0.14 mmol) was dissolved in tetrahydrofuran/methanol/water (5.0 mL 7:2:1) and lithium hydroxide (10 mg, 0.250 mmol) was added. The solution was heated to reflux for 4 hours and cooled to room temperature. The solvent was removed in vacuo and the crude product was purified by preparative high pressure liquid chromatography using a C18 reverse phase column. The appropriate factions were combined and concentrated to afford pure 4-[[4-[4(aminosulfonyl)phenyl]-3-phenylisoxazol-5-yl]methoxy]benozoic acid as a white crystalline material (38 mg, 60%): mp 206.4°-207.9° C. 1H NMR CD3OD 5.29 (S, 2H), 7.01 (d, 2H, 8.4 Hz), 7.25-7.45 (m, 7H), 7.84-7.97 (m, 4H). Mass spectrum calc'd. for C23H18N2O6S: 450. Found: 451 (m+H+).

Provenance & Evidence