Water → Ethyl[1-(4-aminosulfonylphenyl)-5-(4-chlorophenyl)-1H-pyrazole-3-yl]carboxylate

Participants

Reaction Conditions

Reaction Steps

Methyl [1-(4-aminosulfonylphenyl)-5-(4-chlorophenyl)-1H-pyrazole-3-yl]carboxylate (Example 85) (0.10 g) was dissolved in absolute ethanol (10 mL) and a catalytic amount of 21% NaOEt/EtOH was added. The reaction was stirred without temperature control for 72 hours, then water (10 mL) was added. The product crystallized, the suspension was cooled to 0° C. and held for 30 minutes. The product was filtered, washed with water (5 mL) and dried to yield 0.071 g (70%) of a white solid: Mass Spectrum: MH+=406. Anal. Calc'd for C18H16N3O4ClS: C, 53.27; H, 3.97; N, 10.35; Cl, 8.74; S, 7.90. Found: C, 53.04; H, 4.00; N, 10.27; Cl, 8.69; S, 7.97.

Provenance & Evidence