Water → HCID 59759137, compound

HRID 914359Notes

Reaction equation

HRID 914359 reaction equation
[C:1]([O:5][C:6](=[O:26])[C:7]([S:10][C:11]1[S:12][CH:13]=[C:14]([CH2:16][CH2:17][NH:18][C:19]2[CH:24]=[N:23][C:22](Br)=[CH:21][N:20]=2)[N:15]=1)([CH3:9])[CH3:8])([CH3:4])([CH3:3])[CH3:2].[Cl:27][C:28]1[CH:33]=[CH:32][C:31](OB(O)O)=[CH:30][CH:29]=1.C(=O)([O-])[O-].[Na+].[Na+].O>O1CCOCC1.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>[C:1]([O:5][C:6](=[O:26])[C:7]([S:10][C:11]1[S:12][CH:13]=[C:14]([CH2:16][CH2:17][NH:18][C:19]2[CH:24]=[N:23][C:22]([C:31]3[CH:32]=[CH:33][C:28]([Cl:27])=[CH:29][CH:30]=3)=[CH:21][N:20]=2)[N:15]=1)([CH3:9])[CH3:8])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 962WaterHCID 10340Sodium CarbonateHCID 17810664p-Chlorophenylboric acidHCID 59759140HCID 59759140, compound

Product 1

HCID 59759137HCID 59759137, compoundYield 90.9%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

Under nitrogen atmosphere, 2-[(4-{2-[(5-bromopyrazin-2-yl)amino]ethyl}-1,3-thiazol-2-yl)thio]-2-methylpropionic acid tert-butyl ester (10.5 g) synthesized in Example 226-1 and 4-chlorophenylboric acid (5.36 g) were dissolved in dioxane (80 mL) and aqueous sodium carbonate solution (2 mol/L, 40 mL), tetrakis(triphenylphosphine)palladium (1.32 g) was added, and the mixture was refluxed for 4 hr. The reaction mixture was cooled, water was added thereto, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (elution solvent; hexane:ethyl acetate=2:1) to give the title compound (10.2 g) as a brown oil.

Workup

  1. temperaturethe mixture was refluxed for 4 hr
  2. temperatureThe reaction mixture was cooled
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe organic layer was washed with saturated brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. customThe solvent was evaporated under reduced pressure
  7. customthe residue was purified by silica gel chromatography (elution solvent; hexane:ethyl acetate=2:1)

Sources & evidence

ORD record
ord-58f8483c32394396907667008f0d6bea
Source dataset
uspto-grants-2011_09
Patent number
US08026370B2

Reaction notes

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