Tetrahydrofuran → 4-(3-Hydroxy-2-methoxycarbonyl-7-trifluoromethyl-2,3-dihydro-benzo[b]thiophen-3-yl)-piperidine-1-carboxylic acid tert-butyl ester

HRID 2111735Notes

Reaction equation

HRID 2111735 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([C:14](=[O:26])[C:15]2[CH:20]=[CH:19][CH:18]=[C:17]([C:21]([F:24])([F:23])[F:22])[C:16]=2F)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:27]([O:31][CH3:32])(=[O:30])[CH2:28][SH:29].C1COCC1.[H-].[Na+]>C(OCC)(=O)C.C(OCC)(=O)C.CCCCCCC>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([C:14]2([OH:26])[CH:28]([C:27]([O:31][CH3:32])=[O:30])[S:29][C:16]3[C:17]([C:21]([F:22])([F:24])[F:23])=[CH:18][CH:19]=[CH:20][C:15]2=3)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 8028TetrahydrofuranHCID 16907Methyl ThioglycolateHCID 24758Sodium hydrideHCID 588175404-(2-Fluoro-3-trifluoromethyl-benzoyl)-piperidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 684553724-(3-Hydroxy-2-methoxycarbonyl-7-trifluoromethyl-2,3-dihydro-benzo[b]thiophen-3-yl)-piperidine-1-carboxylic acid tert-butyl esterYield 56%

Reagents, catalysts & solvents 2

HCID 8857Ethyl AcetateSolventHCID 21899848Ethylacetate heptaneSolvent

Conditions

Temperature
55 °C

Procedure

To a room temperature solution of 4-(2-fluoro-3-trifluoromethyl-benzoyl)-piperidine-1-carboxylic acid tert-butyl ester (9.00 g, 24.0 mmol), methyl thioglycolate (2.40 mL, 26.8 mmol), and anhydrous THF (200 mL) under nitrogen was added NaH (1.15 g of a 60% oil dispersion, 28.7 mmol) in one portion. After the gas evolution ceased, the reaction was stirred at 55° C. After 100 min, the reaction was cooled to room temperature and diluted with ethyl acetate (500 mL). The mixture was washed with water (300 mL) and brine (300 mL) successively, dried over magnesium sulfate, filtered, and the solvent removed to afford a sticky white solid. Trituration with 20% ethyl acetate/heptane afforded 6.20 g (56%) of the desired product as a white powder.

Workup

  1. temperaturethe reaction was cooled to room temperature
  2. washThe mixture was washed with water (300 mL) and brine (300 mL) successively
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. customthe solvent removed
  6. customto afford a sticky white solid

Sources & evidence

ORD record
ord-6b5be0a0f0db40818b8f0af632d0185b
Source dataset
uspto-grants-2009_04
Patent number
US07521445B2

Reaction notes

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