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Sodium Carbonate → 2-Hydroxy-5-phenylpyridine

HRID 1747785
Notes
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Reaction equation

HRID 1747785 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5](=[O:8])[NH:6][CH:7]=1.[C:9]1(B(O)O)[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.C(=O)([O-])[O-].[Na+].[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.C1(C)C=CC=CC=1>[C:9]1([C:2]2[CH:3]=[CH:4][C:5](=[O:8])[NH:6][CH:7]=2)[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 66827Phenylboronic AcidHCID 5995285-Bromo-2-hydroxypyridine

Product 1

HCID 100579632-Hydroxy-5-phenylpyridineYield 20.3%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalyst
HCID 1140
Toluene
Solvent

Conditions

Temperature
100 °C

Procedure

A mixture of 5-bromopyridin-2(1H)-one (500 mg), phenylboronic acid (385 mg), tetrakis(triphenylphosphine)palladium(0) (498 mg), 2M aqueous sodium carbonate solution (2.87 mL) and toluene (7.0 mL) was stirred at 100° C. for 1 hr under microwave irradiation. The reaction mixture was cooled to room temperature, and filtered through celite. To the filtrate was added saturated aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (100 mg).

Workup

  1. temperatureThe reaction mixture was cooled to room temperature
  2. filtrationfiltered through celite
  3. additionTo the filtrate was added saturated aqueous sodium hydrogen carbonate solution
  4. extractionthe mixture was extracted with ethyl acetate
  5. dry with materialThe extract was dried over anhydrous sodium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel column chromatography (ethyl acetate/hexane)

Sources & evidence

ORD record
ord-4fb81f2c2c0b42e19516b2eededd690f
Source dataset
uspto-grants-2015_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09150588B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes