Tetrabutylammonium Fluoride → HCID 178520859, compound

HRID 2233772Notes

Reaction equation

HRID 2233772 reaction equation
[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[NH:19]1[C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=2[NH:21][C:20]1=[C:28]([C:39]([C:41]1[CH:46]=[CH:45][CH:44]=[C:43]([F:47])[CH:42]=1)=[O:40])[C:29]([C:31]1[CH:32]=[C:33]([CH:36]=[CH:37][CH:38]=1)[CH:34]=O)=[O:30].C1(P(=O)(C2C=CC=CC=2)[CH2:55][C:56]([F:59])([F:58])[F:57])C=CC=CC=1>C1COCC1>[NH:21]1[C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=2[NH:19][C:20]1=[C:28]([C:29]([C:31]1[CH:38]=[CH:37][CH:36]=[C:33](/[CH:34]=[CH:55]\[C:56]([F:59])([F:58])[F:57])[CH:32]=1)=[O:30])[C:39]([C:41]1[CH:46]=[CH:45][CH:44]=[C:43]([F:47])[CH:42]=1)=[O:40]

Participants

5

Reactant 3

HCID 2724141Tetrabutylammonium FluorideHCID 11323568Diphenyl(2,2,2-trifluoroethyl)phosphine oxideHCID 178519574HCID 178519574, compound

Product 1

HCID 178520859HCID 178520859, compoundYield 57.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

A 25 ml portion of THF solution containing 7.8 g of tetrabutylammonium fluoride and 24 g of Molecular Sieve 4A was stirred at room temperature for 12 hours in an atmosphere of argon. After cooling to 0° C., 20 ml of THF solution containing 300 mg of 3-[2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-3-(3-fluorophenyl)-3-oxopropanoyl]benzaldehyde and 1.7 g of diphenyl(2,2,2-trifluoroethyl)phosphine oxide was added dropwise thereto. This was stirred at room temperature for 5 hours. The reaction mixture was filtered, the filtrate was washed with water, dried with anhydrous sodium sulfate and concentrated, and then the thus formed residue was purified by a silica gel column chromatography to obtain 201 mg (57%) of 2-(1,3-dihydro-2H-benzimidazol-2-ylidene)-1-(3-fluorophenyl)-3-{3-[(1Z)-3,3,3-trifluoroprop-1-en-1-yl]phenyl}propane-1,3-dione as a yellow powder from an ethyl acetate-hexane (1:3) eluate. FA: 463

Workup

  1. temperatureAfter cooling to 0° C.
  2. additionwas added dropwise
  3. stirringThis was stirred at room temperature for 5 hours
  4. filtrationThe reaction mixture was filtered
  5. washthe filtrate was washed with water
  6. dry with materialdried with anhydrous sodium sulfate
  7. concentrationconcentrated
  8. customthe thus formed residue was purified by a silica gel column chromatography

Sources & evidence

ORD record
ord-494dd3043bc943cc977d277c70317d14
Source dataset
uspto-grants-2010_05
Patent number
US07709519B2

Reaction notes

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