p-Toluenesulfonic acid monohydrate → 5,7-dichloro-2-[4-(2-hydroxy-ethoxy)-3,5-dimethylphenyl]-3H-quinazolin-4-one

HRID 591718Notes

Reaction equation

[NH2:1][C:2]1[CH:10]=[C:9]([Cl:11])[CH:8]=[C:7]([Cl:12])[C:3]=1[C:4]([NH2:6])=[O:5].[OH:13][CH2:14][CH2:15][O:16][C:17]1[C:24]([CH3:25])=[CH:23][C:20]([CH:21]=O)=[CH:19][C:18]=1[CH3:26].S([O-])(O)=O.[Na+].O.C1(C)C=CC(S(O)(=O)=O)=CC=1>CN(C)C(=O)C>[Cl:12][C:7]1[CH:8]=[C:9]([Cl:11])[CH:10]=[C:2]2[C:3]=1[C:4](=[O:5])[NH:6][C:21]([C:20]1[CH:23]=[C:24]([CH3:25])[C:17]([O:16][CH2:15][CH2:14][OH:13])=[C:18]([CH3:26])[CH:19]=1)=[N:1]2

Participants

Conditions

Temperature: 120 °C

Procedure

To a solution of 2-amino-4,6-dichloro-benzamide (1.54 g, 7.50 mmol) and 4-(2-hydroxy-ethoxy)-3,5-dimethyl-benzaldehyde (1.46 g, 7.50 mmol) in N,N-dimethylacetamide (15 mL) were added sodium hydrogen sulfite (58.5 wt %, 1.51 g, 8.25 mmol) and p-toluenesulfonic acid monohydrate (0.28 g, 1.50 mmol). The reaction mixture was stirred at 120° C. for 16 hours under nitrogen, and then cooled to room temperature. Solvent was evaporated under reduced pressure. Water (100 mL) was added. The separated solid was filtered, washed with water (50 mL), and dried under vacuum. Crude compound was further washed with ether and dried under vacuum to give 5,7-dichloro-2-[4-(2-hydroxy-ethoxy)-3,5-dimethylphenyl]-3H-quinazolin-4-one as a white solid. Yield: 2.42 g (85%).

Workup

temperaturecooled to room temperature
customSolvent was evaporated under reduced pressure
additionWater (100 mL) was added
filtrationThe separated solid was filtered
washwashed with water (50 mL)
customdried under vacuum
washCrude compound was further washed with ether
customdried under vacuum

Sources & evidence

ORD record: ord-fe8ac12aae4e4ecdb183f576ec0e34b0
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09238640B2

Reaction notes

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