N-Iodosuccinimide → HCID 22120912, compound

HRID 1274339Notes

Reaction equation

HRID 1274339 reaction equation
[NH2:1][C:2]1[N:6]([C:7]2[C:12]([Cl:13])=[CH:11][CH:10]=[CH:9][C:8]=2[Cl:14])[N:5]=[C:4]([C:15]#[N:16])[CH:3]=1.IN1[C:22](=O)[CH2:21][CH2:20][C:19]1=[O:24]>C(#N)C>[NH2:1][C:2]1[N:6]([C:7]2[C:8]([Cl:14])=[CH:9][CH:10]=[CH:11][C:12]=2[Cl:13])[N:5]=[C:4]([C:15]#[N:16])[C:3]=1[C:22]1[O:24][CH:19]=[CH:20][CH:21]=1

Participants

4

Reactant 2

HCID 120273N-IodosuccinimideHCID 22120896HCID 22120896, compound

Product 1

HCID 22120912HCID 22120912, compound

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a stirred solution of 5-amino-3-cyano-1-(2,6-dichlorophenyl)pyrazole (0.1318 g) in acetonitrile (5 ml) at room temperature was added N-iodosuccinimide (0.1469 g). Stirring was continued for 1 hour and the mixture was then evaporated to dryness. The residue was taken up in dioxane (5 ml). Furan-2-boronic acid (0.1232 g), tetrakis(triphenylphosphine)palladium(0) (0.0554 g) and a solution of potassium carbonate (0.4405 g) in water (2 ml) were added. The mixture was heated under reflux for 48 hours, then cooled and partitioned between ether and water. The separated aqueous layer was extracted with ether and the combined ether layers were washed with brine, dried and evaporated. The green oily residue was purified by column chromatography on silica gel (4 g) eluted with dichloromethane. Combination and evaporation of suitable fractions followed by recrystallisation from toluene gave the title compound as a light brown solid, m.p. 222.6° C.

Workup

  1. customthe mixture was then evaporated to dryness
  2. additionFuran-2-boronic acid (0.1232 g), tetrakis(triphenylphosphine)palladium(0) (0.0554 g) and a solution of potassium carbonate (0.4405 g) in water (2 ml) were added
  3. temperatureThe mixture was heated
  4. temperatureunder reflux for 48 hours
  5. temperaturecooled
  6. custompartitioned between ether and water
  7. extractionThe separated aqueous layer was extracted with ether
  8. washthe combined ether layers were washed with brine
  9. customdried
  10. customevaporated
  11. customThe green oily residue was purified by column chromatography on silica gel (4 g)
  12. washeluted with dichloromethane
  13. customCombination and evaporation of suitable fractions
  14. customfollowed by recrystallisation from toluene

Sources & evidence

ORD record
ord-aacc11c5054a45f1b1e707808110f6cf
Source dataset
uspto-grants-2000_12
Patent number
US06156782

Reaction notes

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