Sodium hydride → [2-(4-Phenylbutyl)-6,7-dihydro-8H-indeno[5,4-d][1,3]oxazol-8-ylidene]acetonitrile

HRID 883199Notes

Reaction equation

HRID 883199 reaction equation
[H-].[Na+].[C:3]([CH2:5]P(=O)(OCC)OCC)#[N:4].[C:14]1([CH2:20][CH2:21][CH2:22][CH2:23][C:24]2[O:25][C:26]3[C:35]4[C:34](=O)[CH2:33][CH2:32][C:31]=4[CH:30]=[CH:29][C:27]=3[N:28]=2)[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.[Cl-].[NH4+]>O1CCCC1>[C:14]1([CH2:20][CH2:21][CH2:22][CH2:23][C:24]2[O:25][C:26]3[C:35]4[C:34](=[CH:5][C:3]#[N:4])[CH2:33][CH2:32][C:31]=4[CH:30]=[CH:29][C:27]=3[N:28]=2)[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1

Participants

6

Reactant 4

HCID 24758Sodium hydrideHCID 25517Ammonium ChlorideHCID 75676Diethyl (cyanomethyl)phosphonateHCID 577812092-(4-Phenylbutyl)-6,7-dihydro-8H-indeno[5,4-d][1,3]oxazol-8-one

Product 1

HCID 67355173[2-(4-Phenylbutyl)-6,7-dihydro-8H-indeno[5,4-d][1,3]oxazol-8-ylidene]acetonitrileYield 94%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a suspension of 60% sodium hydride (19.5 mg, 0.487 mmol) in tetrahydrofuran (2 mL) was added diethyl cyanomethylphosphonate (85.4 μL, 0.528 mmol) under ice-cooling, and the mixture was stirred for 15 min. Thereto was added a solution of 2-(4-phenylbutyl)-6,7-dihydro-8H-indeno[5,4-d][1,3]oxazol-8-one (124 mg, 0.406=mol) in tetrahydrofuran (2 mL), and the mixture was further stirred for 30 min. To the reaction mixture was added saturated aqueous ammonium chloride solution, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (ethyl acetate/hexane=10/90→40/60) to give the title compound (125 mg, yield 94%).

Workup

  1. temperaturecooling
  2. stirringthe mixture was further stirred for 30 min
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe extract was washed with saturated brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. customThe solvent was evaporated under reduced pressure
  7. customthe residue was purified by silica gel column chromatography (ethyl acetate/hexane=10/90→40/60)

Sources & evidence

ORD record
ord-be9ccdfe979c4ee0bf94a87a696b758b
Source dataset
uspto-grants-2012_08
Patent number
US08236837B2

Reaction notes

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