Cesium carbonate → Methyl 4-(4-chloro-2-fluorophenyl)nicotinate

HRID 870913Notes

Reaction equation

HRID 870913 reaction equation
Cl[C:2]1[C:7]([C:8]([O:10][CH3:11])=[O:9])=[CH:6][N:5]=[CH:4][CH:3]=1.[Cl:12][C:13]1[CH:18]=[CH:17][C:16](B(O)O)=[C:15]([F:22])[CH:14]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:12][C:13]1[CH:18]=[CH:17][C:16]([C:2]2[C:7]([C:8]([O:10][CH3:11])=[O:9])=[CH:6][N:5]=[CH:4][CH:3]=2)=[C:15]([F:22])[CH:14]=1

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 4193595(4-Chloro-2-fluorophenyl)boronic acidHCID 12574055Methyl 4-chloronicotinate

Product 1

HCID 86695906Methyl 4-(4-chloro-2-fluorophenyl)nicotinateYield 46.1%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Procedure

To a stirred solution of methyl 4-chloronicotinate (7 g, 40.8 mmol), (4-chloro-2-fluorophenyl)boronic acid (7.11 g, 40.8 mmol) and cesium carbonate (26.6 g, 82 mmol) in a mixture of dioxane (60 mL) and water (8 mL) purged with nitrogen gas for 5 min, was added Pd(PPh3)4 (2.83 g, 2.448 mmol) and the resultant mixture was heated at 85° C. for 15 h. Water (30 mL) was added and the mixture was extracted with EtOAc (1×50 mL). The organic layer was washed with water (1×30 mL) and brine (1×30 mL), dried over sodium sulfate and concentrated under reduced pressure. The residue was purified via silica gel column (30% EtOAc in hexane) to give methyl 4-(4-chloro-2-fluorophenyl)nicotinate (5 g, 18.82 mmol, 40% yield). LCMS (ESI) m/e 266.7 [(M+H)+, calcd for C13H10ClFNO2 266.0]; LCMS retention time (Method C): tR=1.73 min.

Workup

  1. custompurged with nitrogen gas for 5 min
  2. extractionthe mixture was extracted with EtOAc (1×50 mL)
  3. washThe organic layer was washed with water (1×30 mL) and brine (1×30 mL)
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified via silica gel column (30% EtOAc in hexane)

Sources & evidence

ORD record
ord-1a596c3815b24e599d975bd9dbc40d2a
Source dataset
uspto-grants-2015_03
Patent number
US08969564B2

Reaction notes

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