Imidazole → HCID 135939055, compound

HRID 591723Notes

Reaction equation

HRID 591723 reaction equation
Br[CH2:2][CH2:3][O:4][C:5]1[C:10]([CH3:11])=[CH:9][C:8]([C:12]2[NH:21][C:20](=[O:22])[C:19]3[C:14](=[CH:15][C:16]([O:25][CH3:26])=[CH:17][C:18]=3[O:23][CH3:24])[N:13]=2)=[CH:7][C:6]=1[CH3:27].[NH:28]1[CH:32]=[CH:31][N:30]=[CH:29]1.C([O-])([O-])=O.[Cs+].[Cs+]>CC(C)=O>[N:28]1([CH2:2][CH2:3][O:4][C:5]2[C:10]([CH3:11])=[CH:9][C:8]([C:12]3[NH:21][C:20](=[O:22])[C:19]4[C:14](=[CH:15][C:16]([O:25][CH3:26])=[CH:17][C:18]=4[O:23][CH3:24])[N:13]=3)=[CH:7][C:6]=2[CH3:27])[CH:32]=[CH:31][N:30]=[CH:29]1

Participants

5

Reactant 3

HCID 795ImidazoleHCID 10796Cesium carbonateHCID 1364005142-[4-(2-bromoethoxy)-3,5-dimethylphenyl]-5,7-dimethoxy-3H-quinazolin-4-one

Product 1

HCID 135939055HCID 135939055, compound

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

To a solution of 2-[4-(2-bromoethoxy)-3,5-dimethylphenyl]-5,7-dimethoxy-3H-quinazolin-4-one (0.12 g, 0.27 mmol) in acetone (5 mL) was added imidazole (0.18 g, 2.70 mmol) and Cs2CO3 (0.26 g, 0.80 mmol). The reaction mixture was stirred at room temperature for 16 hours. Solvent was removed under reduced pressure, and the residue was purified by column chromatography (silica gel 230-400 mesh; 3% methanol in dichloromethane as eluent) to give the title compound as a white solid. Yield: 0.04 g (35%). MP 218-219° C. 1H NMR (400 MHz, DMSO-d6): δ 11.80 (br s, 1H), 7.83 (s, 2H), 7.72 (s, 1H), 7.29 (s, 1H), 6.92 (s, 1H), 6.70 (d, J=2.4 Hz, 1H), 6.49 (d, J=2.4 Hz, 1H), 4.36 (t, J=4.8 Hz, 2H), 4.02 (t, J=4.8 Hz, 2H), 3.86 (s, 3H), 3.81 (s, 3H), 2.06 (s, 6H). MS (ES) m/z: 419.57 (M−1).

Workup

  1. customSolvent was removed under reduced pressure
  2. customthe residue was purified by column chromatography (silica gel 230-400 mesh; 3% methanol in dichloromethane as eluent)

Sources & evidence

ORD record
ord-222b727a1c5b43a2aedbb5ba6c681a76
Source dataset
uspto-grants-2016_01
Patent number
US09238640B2

Reaction notes

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