Acetic Acid → 2-Bromo-4-oxo-5-[2-(N-BOC-4-piperidinyl)ethyl]-4,5,6,7-tetrahydrothieno[3,2-c]pyridine

HRID 1741597Notes

Reaction equation

HRID 1741597 reaction equation
[O:1]=[C:2]1[C:7]2[CH:8]=[CH:9][S:10][C:6]=2[CH2:5][CH2:4][N:3]1[CH2:11][CH2:12][CH:13]1[CH2:18][CH2:17][N:16]([C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[CH2:15][CH2:14]1.CC(O)=O.[Br:30]Br>O>[Br:30][C:9]1[S:10][C:6]2[CH2:5][CH2:4][N:3]([CH2:11][CH2:12][CH:13]3[CH2:18][CH2:17][N:16]([C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[CH2:15][CH2:14]3)[C:2](=[O:1])[C:7]=2[CH:8]=1

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 24408BromineHCID 105708044-Oxo-5-[2-(N-BOC-4-Piperidinyl)ethyl]-4,5,6,7-tetrahydrothieno[3,2-c]pyridine

Product 1

HCID 105512282-Bromo-4-oxo-5-[2-(N-BOC-4-piperidinyl)ethyl]-4,5,6,7-tetrahydrothieno[3,2-c]pyridine

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

2-4 (0.73 g, 2.0 mmoles) was added to a 50% aqueous HOAc solution (40 ml) and after stirring at 0°-10° for 10 minutes, Br2 (0.32 g, 2.0 mmoles) was added dropwise. After stirring at 0°-10° for 3 hours, the reaction mixture was diluted with 150 ml H2O and extracted with EtOAc. The organic extract was washed with brine, dried (Na2SO4) and concentrated. The residue was purified by flash chromatography on silica gel eluting with hexane (85)/acetone (15) to give pure 3-1, Rf 0.3.

Workup

  1. stirringAfter stirring at 0°-10° for 3 hours
  2. extractionextracted with EtOAc
  3. extractionThe organic extract
  4. washwas washed with brine
  5. dry with materialdried (Na2SO4)
  6. concentrationconcentrated
  7. customThe residue was purified by flash chromatography on silica gel eluting with hexane (85)/acetone (15)
  8. customto give pure 3-1, Rf 0.3

Sources & evidence

ORD record
ord-eef7a9b29eba4990a1a4aa9fc7aca22a
Source dataset
uspto-grants-1994_08
Patent number
US05334596

Reaction notes

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