Hydrochloric Acid → 1-(8-Bromo-4,5-dihydrothiazolo[4,5-d]benzo[b]oxepin-2-yl)-3,5,5-trimethylimidazolidin-2-one

HRID 1190682Notes

Reaction equation

HRID 1190682 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[C:11]3[N:12]=[C:13]([N:15]4[C:19]([CH3:21])([CH3:20])[CH2:18][NH:17][C:16]4=[O:22])[S:14][C:10]=3[CH2:9][CH2:8][O:7][C:6]=2[CH:23]=1.[H-].[Na+].[CH3:26]I.Cl>O1CCCC1.CN(C)C=O>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[C:11]3[N:12]=[C:13]([N:15]4[C:19]([CH3:21])([CH3:20])[CH2:18][N:17]([CH3:26])[C:16]4=[O:22])[S:14][C:10]=3[CH2:9][CH2:8][O:7][C:6]=2[CH:23]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 582042741-(8-Bromo-4,5-dihydrothiazolo[4,5-d]benzo[b]oxepin-2-yl)-5,5-dimethylimidazolidin-2-one

Product 1

HCID 582041271-(8-Bromo-4,5-dihydrothiazolo[4,5-d]benzo[b]oxepin-2-yl)-3,5,5-trimethylimidazolidin-2-one

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8028TetrahydrofuranSolvent

Procedure

A mixture of 0.254 g (0.65 mmol) of 1-(8-bromo-4,5-dihydrothiazolo[4,5-d]benzo[b]oxepin-2-yl)-5,5-dimethylimidazolidin-2-one from Example 429, and 50.0 mg (1.25 mmol) of 60% sodium hydride dispersion in mineral oil in 2 ml of tetrahydrofuran and 2 ml of dimethylformamide was stirred for 20 min. 0.062 ml (1.00 mmol) of methyl iodide was added in one portion to the above mixture. The mixture was stirred for 30 min and poured into 10 ml of 1 N aq hydrochloric acid. The mixture was extracted with ethyl acetate. The organic extracts were washed with water, brine, dried over magnesium sulfate and concentrated in vacuum. The residue was triturated with hexane and the resulting precipitate was filtered and washed with hexane. Yield 260 mg (98%). MS (ESI+): 408.1

Workup

  1. extractionThe mixture was extracted with ethyl acetate
  2. washThe organic extracts were washed with water, brine
  3. dry with materialdried over magnesium sulfate
  4. concentrationconcentrated in vacuum
  5. customThe residue was triturated with hexane
  6. filtrationthe resulting precipitate was filtered
  7. washwashed with hexane

Sources & evidence

ORD record
ord-6704dd8f741544c9a6dde5c456276c3d
Source dataset
uspto-grants-2014_03
Patent number
US08673952B2

Reaction notes

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