1-(4-Fluorophenyl)piperazine → HCID 59833503, compound

2-(1H-Benzotriazol-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate (150 mg, 0.47 mmol), diisopropylethylamine (102 mg, 0.8 mmol) and 1-(4-fluorophenyl)piperazine (65 mg, 0.47 mmol) were added sequentially at ambient temperature to a stirred solution of 3-(4-oxo-3,4-dihydrophthalazin-1-ylmethyl)benzoic acid (A)(100 mg, 0.36 mmol) in dry dimethylacetamide (1 ml), the mixture was stirred at ambient temperature for 4 hours and allowed to stand at ambient temperature for 16 hours, then it was added dropwise to stirred cold water (10 ml). After 30 minutes, the resulting solid was collected by filtration, washed with water (2×1 ml) and hexane (1 ml), dried in vacuo and purified using preparative HPLC to give 4-{3-[4-(4-fluorophenyl)piperazin-1-ylcarbonyl]benzyl}-1(2H)-phthalazinone (21)(76 mg) as a cream solid; m/z (M+H)+. 443; HPLC Purity 90%; HPLC Retention time 4.00 minutes.

1. waitto stand at ambient temperature for 16 hours
2. additionit was added dropwise
3. waitAfter 30 minutes
4. filtrationthe resulting solid was collected by filtration
5. washwashed with water (2×1 ml) and hexane (1 ml)
6. customdried in vacuo
7. custompurified

ORD record

ord-579ec8b2eb584178bb5ac9d7f4680ad9

Source dataset

uspto-grants-2010_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07662818B2