Sodium Carbonate → 2-Pyridinamine, 3-[4-(4-methylphenoxy)phenyl]-

HRID 1622771Notes

Reaction equation

HRID 1622771 reaction equation
Br[C:2]1[C:3]([NH2:8])=[N:4][CH:5]=[CH:6][CH:7]=1.CC1(C)C(C)(C)OB([C:17]2[CH:22]=[CH:21][C:20]([O:23][C:24]3[CH:29]=[CH:28][C:27]([CH3:30])=[CH:26][CH:25]=3)=[CH:19][CH:18]=2)O1.C(=O)([O-])[O-].[Na+].[Na+]>COCCOC.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>[CH3:30][C:27]1[CH:28]=[CH:29][C:24]([O:23][C:20]2[CH:21]=[CH:22][C:17]([C:2]3[C:3]([NH2:8])=[N:4][CH:5]=[CH:6][CH:7]=3)=[CH:18][CH:19]=2)=[CH:25][CH:26]=1

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 8177002-Amino-3-bromopyridineHCID 66748053HCID 66748053, compound

Product 1

HCID 667477452-Pyridinamine, 3-[4-(4-methylphenoxy)phenyl]-Yield 70.6%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
100 °C

Procedure

Tetrakis(triphenylphosphine)palladium(0) (12.5 g) was added to a suspension of 3-bromopyridin-2-amine (31.2 g), 4,4,5,5-tetramethyl-2-[4-(4-methylphenoxy)phenyl]-1,3,2-dioxaborolane (72.8 g) and sodium carbonate (38.3 g) in 1,2-dimethoxyethane (500 mL) and water (250 mL) and the mixture was stirred at 100° C. under N2 for 16 hr. The mixture was diluted with water at room temperature and extracted with EtOAc-THF (3:1). The separated organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated in vacuo. The residue was purified by column chromatography (NH silica gel, eluted with EtOAc in hexane) to give a crude product, which was washed with diisopropyl ether to give the title compound (35.2 g) as a colorless solid.

Workup

  1. extractionextracted with EtOAc-THF (3:1)
  2. washThe separated organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by column chromatography (NH silica gel, eluted with EtOAc in hexane)
  6. customto give a crude product, which
  7. washwas washed with diisopropyl ether

Sources & evidence

ORD record
ord-4b7bfbe64a044c1eb9b44b4d90259c3f
Source dataset
uspto-grants-2014_07
Patent number
US08778934B2

Reaction notes

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