Acetyl chloride → Acetic acid 4-acetyl-2-(4-tert-butylphenyl)thiophen-3-yl ester

HRID 2103921Notes

Reaction equation

HRID 2103921 reaction equation
[C:1]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[S:12][CH:13]=[C:14]([C:17]([CH3:19])=[O:18])[C:15]=2[OH:16])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.[C:27](Cl)(=[O:29])[CH3:28]>C1COCC1>[C:17]([C:14]1[C:15]([O:16][C:27](=[O:29])[CH3:28])=[C:11]([C:8]2[CH:7]=[CH:6][C:5]([C:1]([CH3:4])([CH3:2])[CH3:3])=[CH:10][CH:9]=2)[S:12][CH:13]=1)(=[O:18])[CH3:19]

Participants

5

Reactant 3

HCID 6367Acetyl chlorideHCID 8471TriethylamineHCID 442072892-(4-t-Butylphenyl)-3-hydroxy-4-methylcarbonylthiophene

Product 1

HCID 67050465Acetic acid 4-acetyl-2-(4-tert-butylphenyl)thiophen-3-yl esterYield 92.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 2-(4-tert-butylphenyl)-3-hydroxy-4-methylcarbonylthiophene (137 mg, 0.5 mmol) in THF (2 mL) were added triethylamine (105 μL, 0.75 mmol) and acetyl chloride (53.3 μL, 0.75 mmol). The reaction mixture was stirred at room temperature for 0.5 h. After removing solvent, the residue was diluted with AcOEt, washed with a saturated aqueous NH4Cl solution, dried over MgSO4 and concentrated to give product as a brown oil (146 mg, yield 92%).

Workup

  1. customAfter removing solvent
  2. additionthe residue was diluted with AcOEt
  3. washwashed with a saturated aqueous NH4Cl solution
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-84c5f9169fb546d88930ee5b86336374
Source dataset
uspto-grants-2009_08
Patent number
US07576115B2

Reaction notes

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