Potassium Carbonate → 3-Bromo-5-phenylpyridine

HRID 2416597Notes

Reaction equation

HRID 2416597 reaction equation
Br[C:2]1[CH:3]=[N:4][CH:5]=[C:6]([Br:8])[CH:7]=1.[C:9]1(B(O)O)[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.C(=O)([O-])[O-].[K+].[K+].[OH-].[Na+]>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.COCCOC.O>[Br:8][C:6]1[CH:5]=[N:4][CH:3]=[C:2]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)[CH:7]=1

Participants

8

Reactant 4

HCID 11430Potassium CarbonateHCID 14798Sodium HydroxideHCID 66827Phenylboronic AcidHCID 693693,5-Dibromopyridine

Product 1

HCID 27629043-Bromo-5-phenylpyridine

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Procedure

A mixture of 3,5-dibromopyridine (10.0 g, 42.2 mmol), phenylboronic acid (4.6 g, 38.0 mmol), tetrakis(triphenylphosphine)palladium(0) (1.45 g, 1.25 mmol), potassium carbonate (17.5 g, 127 mmol), water (63 ml) and 1,2-dimethoxyethane (126 ml) was stirred at reflux overnight. Aqueous sodium hydroxide (1 M, 60 ml) was added followed by extraction twice with diethyl ether (100 ml). Chromatography on silica gel with dichloromethane as solvent gave the title compound. Yield 6.1 g, 68%, Mp 42-44° C.

Workup

  1. temperatureat reflux overnight
  2. extractionfollowed by extraction twice with diethyl ether (100 ml)

Sources & evidence

ORD record
ord-7f2e40b0a7284482a0a0e91bf86a69f5
Source dataset
uspto-grants-2004_11
Patent number
US06825189B1

Reaction notes

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