Succinic anhydride → HCID 131723412, compound

Participants

Reaction Steps

A solution of 3-(4-chlorophenyl)-4-(4-pyridyl)-5-(4-piperzinyl)pyrazole (200 mg; 0.54 mmol; prepared as set forth in Example A-169), succinic anhydride (60 mg, 0.55 mmol) and 4-dimethylaminopyridine (5 mg) was stirred at room temperature for 24 hours. The solvent was removed in vacuo and the residue treated with methanol and water (1:1). The resultant crystalline solid was filtered and air dried to give 170 mg (58%) of 4-[5-(4-chlorophenyl)-4-(4-pyridinyl)-1H-pyrazol-3-yl]-γ-oxo-1-piperazinebutanoic acid, dihydrate, m.p. 281-283° C. (dec.). Anal. Calc'd. for C22H22ClN5O3.2H2O: C, 55.52; H, 5.51; N. 14.72. Found: C, 55.11; H, 5.20; N, 14.44.

Provenance & Evidence