4-Aminophenol → 4-((4-Phenylphthalazin-1-yl)amino)phenol

HRID 593974

Reaction equation

[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][CH:3]=1.Cl[C:10]1[C:19]2[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=2)[C:13]([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[N:12][N:11]=1>C1C=CC=CC=1>[C:20]1([C:13]2[C:14]3[C:19](=[CH:18][CH:17]=[CH:16][CH:15]=3)[C:10]([NH:1][C:2]3[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][CH:3]=3)=[N:11][N:12]=2)[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1

Participants

Conditions

Temperature: 100 °C

Procedure

A pressure bottle was charged with 4-aminophenol (0.453 g, 0.416 mmol), 1-chloro-4-phenylphthalazine (1.00 g, 0.416 mmol) and 16.8 mL of benzene. The bottle was sealed and heated to 100° C. for 25 h. The reaction mixture was concentrated. The crude material was dissolved in methanol and was purified by Gilson reverse phase liquid chromatography, 5-75% ACN/H2O/0.1% TFA over 14 min. The product-containing fractions were combined, brought to basic pH by addition of 1M NaHCO3, and extracted with dichloromethane. The organic portion was dried with MgSO4, filtered and concentrated to provide 4-(4-phenylphthalazin-1-ylamino)phenol as a yellow solid. MS m/z=314 [M+H]+. Calc'd for C20H15N3O: 313.35.

Workup

customThe bottle was sealed
concentrationThe reaction mixture was concentrated
dissolutionThe crude material was dissolved in methanol
customwas purified by Gilson reverse phase liquid chromatography, 5-75% ACN/H2O/0.1% TFA over 14 min
additionbrought to basic pH by addition of 1M NaHCO3
extractionextracted with dichloromethane
dry with materialThe organic portion was dried with MgSO4
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-a6b1e1ef074f458a8308fbebfeee4f42
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09242961B2

Linked notes

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