Hydrochloric Acid → 4-({cyclohexyl[2-ethyl-5-(tetrahydro-2H-thiopyran-4-yl)thiophen-3-yl]methyl}amino)benzoic acid

HRID 1877225Notes

Reaction equation

HRID 1877225 reaction equation
Cl[CH:2]([CH:16]1[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1)[C:3]1[CH:4]=[C:5]([CH:10]2[CH2:15][CH2:14][S:13][CH2:12][CH2:11]2)[S:6][C:7]=1[CH2:8][CH3:9].[NH2:22][C:23]1[CH:32]=[CH:31][C:26]([C:27]([O:29]C)=[O:28])=[CH:25][CH:24]=1.[I-].[Na+].C(=O)([O-])[O-].[Na+].[Na+].Cl.[OH-].[Na+]>C(O)C.O1CCCC1.CN(C)C(=O)C>[CH:16]1([CH:2]([NH:22][C:23]2[CH:32]=[CH:31][C:26]([C:27]([OH:29])=[O:28])=[CH:25][CH:24]=2)[C:3]2[CH:4]=[C:5]([CH:10]3[CH2:15][CH2:14][S:13][CH2:12][CH2:11]3)[S:6][C:7]=2[CH2:8][CH3:9])[CH2:21][CH2:20][CH2:19][CH2:18][CH2:17]1

Participants

10

Reactant 6

HCID 313Hydrochloric AcidHCID 5238Sodium IodideHCID 10340Sodium CarbonateHCID 12082Methyl 4-aminobenzoateHCID 14798Sodium HydroxideHCID 685121934-{4-[chloro(cyclohexyl)methyl]-5-ethylthiophen-2-yl}tetrahydro-2H-thiopyran

Product 1

HCID 685134514-({cyclohexyl[2-ethyl-5-(tetrahydro-2H-thiopyran-4-yl)thiophen-3-yl]methyl}amino)benzoic acidYield 84%

Reagents, catalysts & solvents 3

HCID 702EthanolSolventHCID 8028TetrahydrofuranSolventHCID 31374DimethylacetamideSolvent

Conditions

Temperature
100 °C

Procedure

To a mixture of 4-{4-[chloro(cyclohexyl)methyl]-5-ethylthiophen-2-yl}tetrahydro-2H-thiopyran (1.91 g) synthesized above, methyl 4-aminobenzoate (1.68 g), sodium iodide (1.66 g) and N,N-dimethylacetamide (20 mL) was added sodium carbonate (1.18 g), and the mixture was stirred overnight at 100° C. under an argon atmosphere. 1N Hydrochloric acid was added to quench the reaction, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (20% ethyl acetate/hexane) to give a white solid. To a mixture of the obtained solid, tetrahydrofuran (20 mL) and ethanol (20 mL) was added 1N aqueous sodium hydroxide solution (20 mL), and the mixture was stirred with heating under reflux overnight, and concentrated under reduced pressure. The residue was dissolved in water (60 mL), and 1N hydrochloric acid (20 mL) was added at 0° C. The resulting precipitate was collected by filtration to give the title compound (2.07 g, 84%) as a yellow solid.

Workup

  1. customto quench
  2. customthe reaction
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe extract was washed with saturated brine
  5. dry with materialdried over magnesium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel column chromatography (20% ethyl acetate/hexane)
  8. customto give a white solid
  9. stirringthe mixture was stirred
  10. temperaturewith heating
  11. temperatureunder reflux overnight
  12. concentrationconcentrated under reduced pressure
  13. dissolutionThe residue was dissolved in water (60 mL)
  14. addition1N hydrochloric acid (20 mL) was added at 0° C
  15. filtrationThe resulting precipitate was collected by filtration

Sources & evidence

ORD record
ord-2b01e897abd748369cf0f410be2531ed
Source dataset
uspto-grants-2012_11
Patent number
US08309580B2

Reaction notes

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