Trifluoroacetic acid → N-{4-[4-(4-chlorophenyl)-4,5,6,7-tetrahydro-1-benzothien-2-yl]pyridin-2-yl}acetamide

HRID 1615490Notes

Reaction equation

HRID 1615490 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2(O)[C:13]3[CH:14]=[C:15]([C:17]4[CH:22]=[CH:21][N:20]=[C:19]([NH:23][C:24](=[O:26])[CH3:25])[CH:18]=4)[S:16][C:12]=3[CH2:11][CH2:10][CH2:9]2)=[CH:4][CH:3]=1.C([SiH](CC)CC)C.FC(F)(F)C(O)=O>ClCCCl>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[C:13]3[CH:14]=[C:15]([C:17]4[CH:22]=[CH:21][N:20]=[C:19]([NH:23][C:24](=[O:26])[CH3:25])[CH:18]=4)[S:16][C:12]=3[CH2:11][CH2:10][CH2:9]2)=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 68182981N-{4-[4-(4-chlorophenyl)-4-hydroxy-4,5,6,7-tetrahydro-1-benzothien-2-yl]pyridin-2-yl}acetamide

Product 1

HCID 68183050N-{4-[4-(4-chlorophenyl)-4,5,6,7-tetrahydro-1-benzothien-2-yl]pyridin-2-yl}acetamide

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

In a 100 mL round bottomed flask was placed crude N-{4-[4-(4-chlorophenyl)-4-hydroxy-4,5,6,7-tetrahydro-1-benzothien-2-yl]pyridin-2-yl}acetamide (410 mg, 1.0 mmol) prepared above and 1,2-dichloroethane (10 mL). The mixture was refluxed for 30 min to obtain a yellow solution. To the refluxing mixture were added triethylsilane (1 mL, 6 mmol) and trifluoroacetic acid (2 mL, 20 mmol), and refluxing was continued for an additional 3 hr. The mixture was allowed to cool to rt then concentrated under reduced pressure. The residue was diluted with EtOAc (50 mL) then washed with a saturated aqueous solution of NaHCO3 (50 mL). The aqueous phase was extracted with EtOAc (50 mL). The combined organic phases were dried over anhydrous MgSO4.

Workup

  1. customIn a 100 mL round bottomed flask was placed
  2. temperatureThe mixture was refluxed for 30 min
  3. customto obtain a yellow solution
  4. temperaturerefluxing
  5. concentrationthen concentrated under reduced pressure
  6. additionThe residue was diluted with EtOAc (50 mL)
  7. washthen washed with a saturated aqueous solution of NaHCO3 (50 mL)
  8. extractionThe aqueous phase was extracted with EtOAc (50 mL)
  9. dry with materialThe combined organic phases were dried over anhydrous MgSO4

Sources & evidence

ORD record
ord-e71ac04f0906441abc1c0b88cfed5a3b
Source dataset
uspto-grants-2014_07
Patent number
US08765746B2

Reaction notes

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