Cesium carbonate → 7-Hydroxy-4-(4-morpholin-4-yl-phenyl)-2-phenyl-thiazolo[5,4-c]pyridine-6-carboxylic acid ethyl ester

HRID 642364Notes

Reaction equation

HRID 642364 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[N:11]=[C:10](Br)[C:9]2[S:13][C:14]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)=[N:15][C:8]=2[C:7]=1[OH:22])=[O:5])[CH3:2].[O:23]1[CH2:28][CH2:27][N:26]([C:29]2[CH:34]=[CH:33][C:32](B(O)O)=[CH:31][CH:30]=2)[CH2:25][CH2:24]1.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH2:1]([O:3][C:4]([C:6]1[N:11]=[C:10]([C:32]2[CH:31]=[CH:30][C:29]([N:26]3[CH2:25][CH2:24][O:23][CH2:28][CH2:27]3)=[CH:34][CH:33]=2)[C:9]2[S:13][C:14]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)=[N:15][C:8]=2[C:7]=1[OH:22])=[O:5])[CH3:2]

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 2795359(4-(Morpholin-4-yl)phenyl)boronic acidHCID 866173574-Bromo-7-hydroxy-2-phenyl-thiazolo[5,4-c]pyridine-6-carboxylic acid ethyl ester

Product 1

HCID 684263857-Hydroxy-4-(4-morpholin-4-yl-phenyl)-2-phenyl-thiazolo[5,4-c]pyridine-6-carboxylic acid ethyl esterYield 20.2%

Reagents, catalysts & solvents 2

HCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 312751,4-DioxaneSolvent

Procedure

A mixture of 4-bromo-7-hydroxy-2-phenyl-thiazolo[5,4-c]pyridine-6-carboxylic acid ethyl ester (230 mg, 0.61 mmole), 4-morpholinophenylboronic acid (252 mg, 1.22 mmole), cesium carbonate (596 mg, 1.83 mmole) and tetrakis(triphenylphosphine)-palladium (70 mg, 0.06 mmole) in dioxane (3 ml) was refluxed for 18 h before it was cooled to room temperature, quenched with water and filtered. The filtrate was partitioned between ethyl acetate 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 ethyl acetate and dichloromethane to give the title compound as a white solid (57 mg). MS: (+) m/z 462.35 (M+H+)

Workup

  1. temperaturewas refluxed for 18 h before it
  2. customquenched with water
  3. filtrationfiltered
  4. customThe filtrate was partitioned between ethyl acetate 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 ethyl acetate and dichloromethane

Sources & evidence

ORD record
ord-36b7007609684fa992280e561386175d
Source dataset
uspto-grants-2010_04
Patent number
US07696223B2

Reaction notes

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