Tetrabutylammonium Fluoride → 2-(1-Methylethyl)-5,9,13-trimethyl-2,4,8,12-cyclotetradecatetraen-1-one

HRID 1609349Notes

Reaction equation

HRID 1609349 reaction equation
[CH3:1][CH:2]([C:4]1[C:5]([O:23][Si](C)(C)C)(C#N)[CH2:6][C:7]([CH3:20])=[CH:8][CH2:9][CH2:10][C:11]([CH3:19])=[CH:12][CH2:13][CH2:14][C:15]([CH3:18])=[CH:16][CH:17]=1)[CH3:3].[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[CH3:3][CH:2]([C:4]1[C:5](=[O:23])[CH2:6][C:7]([CH3:20])=[CH:8][CH2:9][CH2:10][C:11]([CH3:19])=[CH:12][CH2:13][CH2:14][C:15]([CH3:18])=[CH:16][CH:17]=1)[CH3:1]

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 544770112-(1-Methylethyl)-5,9,13-trimethyl-1-trimethylsiloxy-2,4,8,12-cyclotetradecatetraene-1-carbonitrile

Product 1

HCID 570081642-(1-Methylethyl)-5,9,13-trimethyl-2,4,8,12-cyclotetradecatetraen-1-oneYield 85%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

The above cyanohydrine trimethylsilyl ether compound, 2-(1-methylethyl)-5,9,13-trimethyl-1-trimethylsiloxy-2,4,8,12-cyclotetradecatetraen-1-carbonitrile (657 mg, 1.7 mmol) was dissolved in 10% aqueous tetrahydrofuran (10 ml). To the solution on an ice-water bath was added a solution of 1 M tetra n-butylammonium fluoride in tetrahydrofuran (0.02 ml), and the mixture was stirred and then allowed to stand at room temperature for 2 days. Most of the tetrahydrofuran was removed in vacuo and the residue was dissolved in ethyl ether. The ether layer was dried over MgSO4, filtered, concentrated, and subjected to silica gel column chromatography (solvent: n-hexane/ethyl acetate=30:1) to obtain the ketone compound, 2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-cyclotetradecatetraen-1-one (411 mg, 85%). ##STR51##

Workup

  1. customMost of the tetrahydrofuran was removed in vacuo
  2. dissolutionthe residue was dissolved in ethyl ether
  3. dry with materialThe ether layer was dried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-3458c4e06f4c4d8c87edad78cc46ed75
Source dataset
uspto-grants-1995_03
Patent number
US05399724

Reaction notes

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