4-Toluenesulfonyl chloride → HCID 87467528, compound

HRID 1824765Notes

Reaction equation

HRID 1824765 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5](/[CH:9]=[CH:10]/[CH2:11][CH:12]([OH:14])[CH3:13])[CH:6]=[N:7][CH:8]=1.[C:15]1([CH3:25])[CH:20]=[CH:19][C:18]([S:21](Cl)(=[O:23])=[O:22])=[CH:17][CH:16]=1>N1C=CC=CC=1>[C:15]1([CH3:25])[CH:20]=[CH:19][C:18]([S:21]([O:14][CH:12]([CH2:11]/[CH:10]=[CH:9]/[C:5]2[CH:6]=[N:7][CH:8]=[C:3]([O:2][CH3:1])[CH:4]=2)[CH3:13])(=[O:23])=[O:22])=[CH:17][CH:16]=1

Participants

4

Reactant 2

HCID 73974-Toluenesulfonyl chlorideHCID 22060168HCID 22060168, compound

Product 1

HCID 87467528HCID 87467528, compound

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

To a stirred solution of (4E)-5-(5-methoxy-3-pyridyl)-4-penten-2-ol (3.50 g, 18.13 mmol) in dry pyridine (15 mL) at 0° C. was added p-toluenesulfonyl chloride (6.91 g, 36.27 mmol). The reaction mixture was stirred for 24 h at ambient temperature. The pyridine was removed by rotary evaporation. Toluene (50 mL) was added to the residue and subsequently removed by rotary evaporation. The crude product was stirred with a saturated solution of sodium bicarbonate (100 mL) and extracted with chloroform (3×100 mL). The combined chloroform extracts were dried over sodium sulfate, filtered, and concentrated by rotary evaporation to give 5.25 g (83.5%) of a dark-brown, viscous oil.

Workup

  1. customThe pyridine was removed by rotary evaporation
  2. additionToluene (50 mL) was added to the residue
  3. customsubsequently removed by rotary evaporation
  4. stirringThe crude product was stirred with a saturated solution of sodium bicarbonate (100 mL)
  5. extractionextracted with chloroform (3×100 mL)
  6. dry with materialThe combined chloroform extracts were dried over sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated by rotary evaporation
  9. customto give 5.25 g (83.5%) of a dark-brown, viscous oil

Sources & evidence

ORD record
ord-05bd02d4223a4e168a97826ec2aae497
Source dataset
uspto-grants-2006_05
Patent number
US07045538B2

Reaction notes

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