Iodoethane → 3-Dibenzylamino-6,7-difluoro-1-ethyl-1H-quinazoline-2,4-dione

HRID 729400Notes

Reaction equation

HRID 729400 reaction equation
[CH2:1]([N:8]([CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[N:9]1[C:18](=[O:19])[C:17]2[C:12](=[CH:13][C:14]([F:21])=[C:15]([F:20])[CH:16]=2)[NH:11][C:10]1=[O:22])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Na+].[CH2:32](I)[CH3:33]>CN(C)C=O>[CH2:23]([N:8]([CH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1)[N:9]1[C:18](=[O:19])[C:17]2[C:12](=[CH:13][C:14]([F:21])=[C:15]([F:20])[CH:16]=2)[N:11]([CH2:32][CH3:33])[C:10]1=[O:22])[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1

Participants

5

Reactant 3

HCID 6340IodoethaneHCID 24758Sodium hydrideHCID 219790003-Dibenzylamino-6,7-difluoro-1H-quinazoline-2,4-dione

Product 1

HCID 219794283-Dibenzylamino-6,7-difluoro-1-ethyl-1H-quinazoline-2,4-dioneYield 73.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Procedure

A solution of 3-dibenzylamino-6,7-difluoro-1H-quinazoline-2,4-dione (Example 16) (0.43 g, 1.1 mmol) in 10 mL of N,N-dimethylformamide is added to a suspension of sodium hydride (0.05 g, 1.3 mmol) in 10 mL of N,N-dimethylformamide and stirred for 30 minutes. Ethyl iodide (0.13 mL, 1.6 mmol) is added, and the mixture is stirred at 25° C. for 18 hours. The reaction is quenched with 1 mL of water and concentrated in vacuo. The residue is dissolved in chloroform, washed with water, brine, and dried over magnesium sulfate. The solution is concentrated and purified via chromatography (SiO2, CHCl3) to give 0.34 g of the title compound as a solid, mp 133-135° C., MS CI, m/z 422 (MH+).

Workup

  1. stirringthe mixture is stirred at 25° C. for 18 hours
  2. customThe reaction is quenched with 1 mL of water
  3. concentrationconcentrated in vacuo
  4. dissolutionThe residue is dissolved in chloroform
  5. washwashed with water, brine
  6. dry with materialdried over magnesium sulfate
  7. concentrationThe solution is concentrated
  8. custompurified via chromatography (SiO2, CHCl3)

Sources & evidence

ORD record
ord-c6e2cdb8279841e3877b5c64f7aa9893
Source dataset
uspto-grants-2009_09
Patent number
US07582627B2

Reaction notes

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