HCID 15790541, compound → HCID 15279914, compound

HRID 726181Notes

Reaction equation

HRID 726181 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH2:8][CH:9]([C:13]2[CH:18]=[CH:17][C:16]([Cl:19])=[CH:15][CH:14]=2)[C:10]([OH:12])=O)[CH:5]=[CH:6][CH:7]=1>S(Cl)(Cl)=O>[Cl:1][C:2]1[CH:3]=[C:4]2[C:5](=[CH:6][CH:7]=1)[C:10](=[O:12])[CH:9]([C:13]1[CH:18]=[CH:17][C:16]([Cl:19])=[CH:15][CH:14]=1)[CH2:8]2

Participants

3

Reactant 1

HCID 15790541HCID 15790541, compound

Product 1

HCID 15279914HCID 15279914, compound

Reagents, catalysts & solvents 1

HCID 24386Thionyl ChlorideSolvent

Conditions

Temperature
0 °C

Procedure

The crude product from Step A was combined with 50 ml of thionyl chloride and then heated at reflux for 2 hours. Thionyl chloride was removed by concentration at reduced pressure and then the mixture was concentrated several times from carbon tetrachloride. The residue was combined with 200 ml of dichloroethane, cooled under nitrogen to 0° C., and 24.5 g of aluminum trichloride was then added. After stirring overnight the reaction was poured onto a mixture of ice in 1N hydrochloric acid, extracted three times with ether and chromatographed on silica gel (10% ethyl acetate/hexane) to afford 18.6 g of a yellow oily solid.

Workup

  1. temperatureheated
  2. temperatureat reflux for 2 hours
  3. customThionyl chloride was removed by concentration at reduced pressure
  4. concentrationthe mixture was concentrated several times from carbon tetrachloride
  5. addition24.5 g of aluminum trichloride was then added
  6. additionwas poured onto a mixture of ice in 1N hydrochloric acid
  7. extractionextracted three times with ether
  8. customchromatographed on silica gel (10% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-fa5b8380d9794c81a76a2796f57066b7
Source dataset
uspto-grants-1998_01
Patent number
US05708170

Reaction notes

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