Ammonia → N'-[[1-(4-(aminosulfonyl)phenyl]-5-(4-chlorophenyl)-1H-pyrazol-3-yl]methyl]-N'-hydroxyurea

Participants

Reaction Steps

The compound from Step 5 (6.0 g, 9.7 mmol) was dissolved in 150 mL of ethanol and the solution was saturated with ammonia. The solution was let stand undisturbed overnight and then concentrated in vacuo. The residue was dissolved in ethyl acetate, washed with 1 N HCl and brine, dried over anhyd. MgSO4, filtered and concentrated in vacuo to afford N′-[[1-(4-(aminosulfonyl)phenyl]-5-(4-chlorophenyl)-1H-pyrazol-3-yl]methyl]-N′-hydroxyurea as a white solid that was crystallized from a mixture of ethyl acetate and hexane: mp 216-218° C.

Provenance & Evidence