1,2-Dimethoxyethane → 4-Chloro-6-(2,3-difluorophenyl)pyrimidine

HRID 1592256Notes

Reaction equation

HRID 1592256 reaction equation
[F:1][C:2]1[C:7]([F:8])=[CH:6][CH:5]=[CH:4][C:3]=1B(O)O.COCCOC.[Cl:18][C:19]1[CH:24]=[C:23](Cl)[N:22]=[CH:21][N:20]=1>O>[Cl:18][C:19]1[CH:24]=[C:23]([C:3]2[CH:4]=[CH:5][CH:6]=[C:7]([F:8])[C:2]=2[F:1])[N:22]=[CH:21][N:20]=1

Participants

5

Reactant 3

HCID 80711,2-DimethoxyethaneHCID 709434,6-DichloropyrimidineHCID 2734333(2,3-Difluorophenyl)boronic acid

Product 1

HCID 225997504-Chloro-6-(2,3-difluorophenyl)pyrimidineYield 42%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Conditions

Temperature
80 °C

Procedure

A reaction vessel was charged with 2.03 g of tetrakistriphenylphosphine palladium, 5.55 g of 2,3-difluorophenylboronic acid, and 14.9 g of tripotassium phosphate n-hydrate, to which 120 ml of 1,2-dimethoxyethane, 30 ml of water, and 5.20 g of 4,6-dichloropyrimidine were added, followed by stirring at 80° C. under an atmosphere of a nitrogen gas for 12 hours. The reaction mixture was then left for cooling to room temperature, and water was added to the reaction mixture, which was extracted with ethyl acetate. The organic layer was washed with a saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and then concentrated. The residue was subjected to silica gel column chromatography to give 3.32 g of 4-chloro-6-(2,3-difluorophenyl)pyrimidine.

Workup

  1. additionwere added
  2. waitThe reaction mixture was then left
  3. temperaturefor cooling to room temperature
  4. extractionwas extracted with ethyl acetate
  5. washThe organic layer was washed with a saturated aqueous sodium chloride solution
  6. dry with materialdried over anhydrous magnesium sulfate
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-c65c721ee9464afcac022c8fd17a4789
Source dataset
uspto-grants-2007_11
Patent number
US07291730B2

Reaction notes

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