1-Tert-butyl-4-isocyanatobenzene → N-[3-[(6,7-Dimethoxy-4-quinazolinyl)oxy]phenyl]-N′-[4-(1,1-dimethylethyl)phenyl]urea

HRID 631504Notes

Reaction equation

[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][C:12]=1[O:13][CH3:14])[N:9]=[CH:8][N:7]=[C:6]2[O:15][C:16]1[CH:17]=[C:18]([CH:20]=[CH:21][CH:22]=1)[NH2:19].[C:23]([C:27]1[CH:32]=[CH:31][C:30]([N:33]=[C:34]=[O:35])=[CH:29][CH:28]=1)([CH3:26])([CH3:25])[CH3:24]>CN(C=O)C.O>[C:23]([C:27]1[CH:32]=[CH:31][C:30]([NH:33][C:34]([NH:19][C:18]2[CH:20]=[CH:21][CH:22]=[C:16]([O:15][C:6]3[C:5]4[C:10](=[CH:11][C:12]([O:13][CH3:14])=[C:3]([O:2][CH3:1])[CH:4]=4)[N:9]=[CH:8][N:7]=3)[CH:17]=2)=[O:35])=[CH:29][CH:28]=1)([CH3:26])([CH3:24])[CH3:25]

Participants

Conditions

Temperature: 50 °C

Procedure

To 3-(6,7-dimethoxyquinazolin-4-yloxy)aniline from Example 113A (89 mg, 0.3 mmol) in DMF (3 mL) was added 4-tert-butylphenyl isocyanate (54 μL, 0.3 mmol) and the solution stirred at 50° C. for 4h. The reaction was allowed to cool to room temperature, diluted with H2O, and extracted with EtOAc. The organic layer was washed with brine, dried over MgSO4, filtered, concentrated in vacuo, and purified by column chromatography (25-100% EtOAc/hexanes) to give 1-(4-tert-butylphenyl)-3-(3-(6,7-dimethoxyquinazolin-4-yloxy)phenyl)urea (54 mg, 0.11 mmol, 38%). 1H NMR (300 MHz, DMSO-d6) δ 8.83 (s, 1H), 8.65 (s, 1H), 8.57 (s, 1H), 7.60 (s, 1H), 7.56 (s, 1H), 7.40-7.21 (m, 7H), 6.91 (d, 1H), 3.99 (s, 6H), 1.25 (s, 9H); LC-MS (ESI) m/z 473 (M+H)+.

Workup

temperatureto cool to room temperature
extractionextracted with EtOAc
washThe organic layer was washed with brine
dry with materialdried over MgSO4
filtrationfiltered
concentrationconcentrated in vacuo
custompurified by column chromatography (25-100% EtOAc/hexanes)

Sources & evidence

ORD record: ord-9ed050bcc13c4d359e5791d02baeda91
Source dataset: uspto-grants-2016_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09320739B2

Reaction notes

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