Aniline → HCID 10948950, compound

HRID 1069810Notes

Reaction equation

[OH:1][C:2]1[C:11]([C:12]([OH:14])=O)=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[C:7]([C:15]([OH:17])=O)[CH:8]=2)[CH:3]=1.[NH2:18][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.P(Cl)(Cl)Cl.C(=O)([O-])[O-].[Na+].[Na+]>C1(C)C(C)=CC=CC=1.O>[OH:1][C:2]1[C:11]([C:12]([NH:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)=[O:14])=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[C:7]([C:15]([NH:18][C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)=[O:17])[CH:8]=2)[CH:3]=1

Participants

Conditions

Temperature: 90 °C

Procedure

2-Hydroxy-3,6-dihydroxycarbonylnaphthalene (4.64 g) and aniline (4.10 g) were dispersed in xylene (92.8 g), followed by heating to 90° C. Phosphorous trichloride (2.4 g) was added dropwise at 90 to 100° C., and then the mixture was reacted at 140° C. for 3 hours. After the completion of the reaction, water (92.8 g) was added and the reaction solution was neutralized with sodium carbonate at 90° C. The solution was filtered at room temperature and washed in turn with xylene (46.4 g) and water (46.4 g). The resultant crystal was subjected to reflux washing using acetone (80 g) and then filtered. This operation was repeated three times, followed by drying to obtain 3.5 g of 2-hydroxy-3,6-diphenylaminocarbonylnaphthalene as a white powdered crystal (melting point: 314-317° C.).

Workup

customthe mixture was reacted at 140° C. for 3 hours
additionwas added
filtrationThe solution was filtered at room temperature
washwashed in turn with xylene (46.4 g) and water (46.4 g)
temperatureto reflux
washwashing
filtrationfiltered
customby drying

Sources & evidence

ORD record: ord-0a07a9482a8846e0a1f9cb90a2e248cb
Source dataset: uspto-grants-2001_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06252104B1

Reaction notes

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