Cesium carbonate → HCID 68428007, compound

HRID 642366Notes

Reaction equation

HRID 642366 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[N:11]=[C:10](Br)[C:9]2[N:13]=[C:14]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[S:15][C:8]=2[C:7]=1[OH:22])=[O:5])[CH3:2].[C:23]([C:25]1[CH:30]=[CH:29][C:28](B(O)O)=[CH:27][CH:26]=1)#[N:24].C(=O)([O-])[O-].[Cs+].[Cs+]>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>[CH2:1]([O:3][C:4]([C:6]1[N:11]=[C:10]([C:28]2[CH:29]=[CH:30][C:25]([C:23]#[N:24])=[CH:26][CH:27]=2)[C:9]2[N:13]=[C:14]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)[S:15][C:8]=2[C:7]=1[OH:22])=[O:5])[CH3:2]

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 27343264-Cyanophenylboronic acidHCID 866173544-Bromo-7-hydroxy-2-phenyl-thiazolo[4,5-c]pyridine-6-carboxylic acid ethyl ester

Product 1

HCID 68428007HCID 68428007, compoundYield 42.9%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

A mixture of 4-bromo-7-hydroxy-2-phenyl-thiazolo[4,5-c]pyridine-6-carboxylic acid ethyl ester (300 mg, 0.79 mmole), para-cyanophenylboronic acid (233 mg, 1.59 mmole), cesium carbonate (776 mg, 2.38 mmole) and tetrakis(triphenylphosphine)palladium (92 mg, 0.08 mmole) in dioxane (4 ml) was refluxed for 16 h before it was cooled to room temperature, quenched with water and filtered. The filtrate was partitioned between dichloromethane and water. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel with a gradient of dichloromethane and hexanes to give the title compound as a white solid (136 mg). MS: (+) m/z 402.32 (M+H+)

Workup

  1. temperaturewas refluxed for 16 h before it
  2. customquenched with water
  3. filtrationfiltered
  4. customThe filtrate was partitioned between dichloromethane and water
  5. washThe organic layer was washed with brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by flash column chromatography on silica gel with a gradient of dichloromethane and hexanes

Sources & evidence

ORD record
ord-ab0b6538530444c7a3407804b6b5eaab
Source dataset
uspto-grants-2010_04
Patent number
US07696223B2

Reaction notes

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