p-Toluenesulfonic acid → HCID 136037960, compound

HRID 336682Notes

Reaction equation

[C:1]([NH2:10])(=[O:9])[C:2]1[C:3](=[CH:5][CH:6]=[CH:7][CH:8]=1)[NH2:4].C([Si](C)(C)[O:16][CH2:17][CH2:18][O:19][C:20]1[C:27]([CH3:28])=[CH:26][C:23]([CH:24]=O)=[CH:22][C:21]=1[CH3:29])(C)(C)C.S([O-])(O)=O.[Na+].C1(C)C=CC(S(O)(=O)=O)=CC=1>CN(C)C(=O)C.O>[OH:16][CH2:17][CH2:18][O:19][C:20]1[C:27]([CH3:28])=[CH:26][C:23]([C:24]2[NH:10][C:1](=[O:9])[C:2]3[C:3](=[CH:5][CH:6]=[CH:7][CH:8]=3)[N:4]=2)=[CH:22][C:21]=1[CH3:29]

Participants

Conditions

Temperature: 150 °C

Procedure

A mixture of anthranilamide (0.15 g, 1.10 mmol), 4-[2(tert-butyl-dimethyl-silanyloxy)-ethoxy]-3,5-dimethyl-benzaldehyde (0.340 g, 1.101 mmol), sodium hydrogensulfite (0.126 g, 1.101 mmol) and p-toluenesulfonic acid (20 mg) in N,N-dimethyl acetamide (5 mL) was stirred at 150° C. for 3 h under nitrogen. The reaction mixture was cooled to room temperature and diluted with water (20 mL). The solid was collected by filtration, washed with water (10 mL×3) and dried under high vacuum to provide desired compound (328 mg, 70%), as a white solid. A solution of the above described compound (0.316 g, 0.745 mmol) in THF (3 mL) was cooled to 0° C. under nitrogen and TBAF (1.5 mL, 1.49 mmol) was added, followed by stirring at room temperature for 1 h. The reaction mixture was diluted with cold water (30 mL), the white precipitate was filtered off, washed with water (15 mL×3) and MeOH (20 mL×3) and dried under high vacuum, to afford 2-(4-(2-hydroxyethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-one (150 mg, 65%), as a white solid. Selected data: MS (ES) m/z: 311.04; MP 260-261° C.

Workup

temperatureThe reaction mixture was cooled to room temperature
filtrationThe solid was collected by filtration
washwashed with water (10 mL×3)
customdried under high vacuum

Sources & evidence

ORD record: ord-7ef5f901024b46f393a615a5a596aa79
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08889698B2

Reaction notes

Loading…