Sodium Carbonate → 5-Bromo-2-phenylpyrimidine

HRID 2274470Notes

Reaction equation

HRID 2274470 reaction equation
[Br:1][C:2]1[CH:3]=[N:4][C:5](I)=[N: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>[Br:1][C:2]1[CH:3]=[N:4][C:5]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)=[N:6][CH:7]=1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 66827Phenylboronic AcidHCID 70066515-Bromo-2-iodopyrimidine

Product 1

HCID 143877455-Bromo-2-phenylpyrimidineYield 110.3%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Procedure

A mixture consisting of 5-bromo-2-iodopyrimidine (Bridge Organics, 10.0 g, 35.1 mmol), benzene boronic acid (Alfa Aesar, 4.25 g, 35.1 mmol), tetrakis(triphenylphosphine)palladium (Strem, 0.405 g, 0.351 mmol), toluene (150 mL), and a 2 M aqueous sodium carbonate solution (35 mL) was stirred at 115° C. (degrees Celsius) under a nitrogen atmosphere for 16 hours. After cooling to room temperature, the mixture was partitioned between chloroform (250 mL) and brine (200 mL). The phases were separated and the organic phase was dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give an orange oil (9.1 g). The crude product was purified by flash silica column chromatography. Elution through a 500-g Analogix® flash silica cartridge with 100% hexanes afforded the title intermediate as a white solid (3.15 g, 38% yield). Rf 0.69 with 9:1 v/v hexanes-ethyl acetate; 1H-NMR (400 MHz; CDCl3) δ 8.83 (s, 2H), 8.44-8.38 (m, 2H), 7.52-7.46 (m, 3H); MS (APCI+) m/z 236.9 (M+1).

Workup

  1. customthe mixture was partitioned between chloroform (250 mL) and brine (200 mL)
  2. customThe phases were separated
  3. dry with materialthe organic phase was dried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-1f4abd3ebcdd4e3b9686262e69e161de
Source dataset
uspto-grants-2015_09
Patent number
US09126973B2

Reaction notes

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