Cesium fluoride → HCID 24764519, compound

HRID 335093Notes

Reaction equation

HRID 335093 reaction equation
Br[C:2]1[CH:3]=[C:4]([S:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=2[Cl:22])[C:5]([NH:8][C:9]2[S:10][CH:11]=[C:12]([CH3:14])[N:13]=2)=[N:6][CH:7]=1.CC1(C)C(C)(C)OB(B2OC(C)(C)C(C)(C)O2)[O:25]1.C1(P(C2CCCC2)C2CCCC2)CCCC1.[F-].[Cs+]>C(#N)C.CC([O-])=O.CC([O-])=O.[Pd+2]>[Cl:22][C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][C:16]=1[S:15][C:4]1[CH:3]=[C:2]([OH:25])[CH:7]=[N:6][C:5]=1[NH:8][C:9]1[S:10][CH:11]=[C:12]([CH3:14])[N:13]=1

Participants

7

Reactant 4

HCID 25953Cesium fluorideHCID 2733548Bis(pinacolato)diboraneHCID 4463278Phosphine, tricyclopentyl-HCID 24764526N-(5-bromo-3-(2-chlorophenylthio)pyridin-2-yl)-4-methylthiazol-2-amine

Product 1

HCID 24764519HCID 24764519, compound

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 6342AcetonitrileSolvent

Conditions

Temperature
90 °C

Procedure

A degassed mixture of N-(5-bromo-3-(2-chlorophenylthio)pyridin-2-yl)-4-methylthiazol-2-amine (1.10 g, 2.66 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (1.35 g, 5.32 mmol), Pd(OAc)2 (60 mg, 0.27 mmol), tricyclopentylphosphine (93 mg. 0.40 mmol) and cesium fluoride (3.64 g, 23.9 mmol) in acetonitrile is heated at 90° C. for 5 hours. The reaction mixture is cooled and partitioned between ether and water. The crude product is dissolved in THF. N-morpholine N-oxide (1.40 g, 12.0 mmol) is added and the reaction mixture is heated at reflux for 12 hours. The reaction mixture is cooled and partitioned between ether and water: The organic layer is washed with water and brine, dried and concentrated. The residue is purified by silica gel chromatography, eluting with 10-20% EtOAc in hexanes to afford the title compound.

Workup

  1. temperatureThe reaction mixture is cooled
  2. custompartitioned between ether and water
  3. dissolutionThe crude product is dissolved in THF
  4. temperaturethe reaction mixture is heated
  5. temperatureat reflux for 12 hours
  6. temperatureThe reaction mixture is cooled
  7. custompartitioned between ether and water
  8. washThe organic layer is washed with water and brine
  9. customdried
  10. concentrationconcentrated
  11. customThe residue is purified by silica gel chromatography
  12. washeluting with 10-20% EtOAc in hexanes

Sources & evidence

ORD record
ord-b35f712f56d0415f809078ec32764091
Source dataset
uspto-grants-2014_11
Patent number
US08883828B2

Reaction notes

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