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Cesium carbonate → (2E)-3-(4-tert-Butylphenyl)-3-(5-chloro-6-methoxypyridin-2-yl)prop-2-en-1-ol

HRID 70526
Notes
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Reaction equation

HRID 70526 reaction equation
[C:1]([C:5]1[CH:10]=[CH:9][C:8](B(O)O)=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].O1C=CC=C1P(C1OC=CC=1)C1OC=CC=1.C(=O)([O-])[O-].[Cs+].[Cs+].[Cl:36][C:37]1[CH:38]=[CH:39][C:40](/[C:45](/I)=[CH:46]/[CH2:47][OH:48])=[N:41][C:42]=1[O:43][CH3:44]>O1CCOCC1.C(OCC)(=O)C.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].O>[C:1]([C:5]1[CH:10]=[CH:9][C:8](/[C:45](/[C:40]2[CH:39]=[CH:38][C:37]([Cl:36])=[C:42]([O:43][CH3:44])[N:41]=2)=[CH:46]\[CH2:47][OH:48])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

9

Reactant 4

HCID 10796Cesium carbonateHCID 521585Tris(furan-2-yl)phosphaneHCID 27343204-tert-Butylphenylboronic acidHCID 58452855(2Z)-3-(5-Chloro-6-methoxypyridin-2-yl)-3-iodoprop-2-en-1-ol

Product 1

HCID 58452849(2E)-3-(4-tert-Butylphenyl)-3-(5-chloro-6-methoxypyridin-2-yl)prop-2-en-1-olYield 101.6%

Reagents, catalysts & solvents

4
HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
65 °C

Procedure

4-tert-Butylphenylboronic acid (3.5 g), tris(dibenzylideneacetone)dipalladium(0) (183 mg), tri(2-furyl)phosphine (280 mg) and cesium carbonate (1.98 g) were added to a solution of (2Z)-3-(5-chloro-6-methoxypyridin-2-yl)-3-iodoprop-2-en-1-ol (881 mg) in 1,4-dioxane (20 mL)-water (10 mL) in a nitrogen atmosphere, and the mixture was stirred at an external temperature of 65° C. for 1.5 hours. The reaction solution was left to cool, diluted with ethyl acetate and filtered. The filtrate was washed with brine and dried over sodium sulfate. After filtration, the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=19:1→1:1) to give the title compound as a light yellow powder (912 mg, 91%).

Workup

  1. waitThe reaction solution was left
  2. temperatureto cool
  3. filtrationfiltered
  4. washThe filtrate was washed with brine
  5. dry with materialdried over sodium sulfate
  6. filtrationAfter filtration
  7. customthe solvent was evaporated under reduced pressure
  8. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=19:1→1:1)

Sources & evidence

ORD record
ord-08a57a96d9184121a1cb0aadff6dac11
Source dataset
uspto-grants-2014_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08822503B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes