Cesium carbonate → (5R)-5-[(E)-2-(5-cyclopropyl-6-methoxypyridin-2-yl)-2-(3,4-dichlorophenyl)ethenyl]pyrrolidin-2-one

HRID 70679Notes

Reaction equation

HRID 70679 reaction equation
Br/[C:2](/[C:10]1[CH:15]=[CH:14][C:13]([CH:16]2[CH2:18][CH2:17]2)=[C:12]([O:19][CH3:20])[N:11]=1)=[CH:3]\[C@@H:4]1[NH:8][C:7](=[O:9])[CH2:6][CH2:5]1.[Cl:21][C:22]1[CH:23]=[C:24](OB(O)O)[CH:25]=[CH:26][C:27]=1[Cl:28].O1C=CC=C1P(C1OC=CC=1)C1OC=CC=1.C(=O)([O-])[O-].[Cs+].[Cs+]>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].C(OCC)(=O)C.O.O1CCOCC1>[CH:16]1([C:13]2[CH:14]=[CH:15][C:10](/[C:2](/[C:25]3[CH:24]=[CH:23][C:22]([Cl:21])=[C:27]([Cl:28])[CH:26]=3)=[CH:3]/[C@@H:4]3[NH:8][C:7](=[O:9])[CH2:6][CH2:5]3)=[N:11][C:12]=2[O:19][CH3:20])[CH2:18][CH2:17]1

Participants

9

Reactant 4

HCID 10796Cesium carbonateHCID 521585Tris(furan-2-yl)phosphaneHCID 219399273,4-Dichloro-phenyl-boric acidHCID 58452792(5R)-5-[(Z)-2-bromo-2-(5-cyclopropyl-6-methoxypyridin-2-yl)ethenyl]pyrrolidin-2-one

Product 1

HCID 67397284(5R)-5-[(E)-2-(5-cyclopropyl-6-methoxypyridin-2-yl)-2-(3,4-dichlorophenyl)ethenyl]pyrrolidin-2-one

Reagents, catalysts & solvents 4

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolvent2×HCID 8857Ethyl AcetateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
90 °C

Procedure

1,4-Dioxane (4 mL) and water (0.5 mL) were added to a mixture of (5R)-5-[(Z)-2-bromo-2-(5-cyclopropyl-6-methoxypyridin-2-yl)ethenyl]pyrrolidin-2-one (300 mg), 3,4-dichlorophenylboric acid (340 mg), tris(dibenzylideneacetone)dipalladium (81 mg), tri(2-furyl) phosphine (124 mg) and cesium carbonate (867 mg), and the mixture was stirred at 90° C. for three hours. Water and ethyl acetate were added to the reaction solution and the insoluble matter was filtered off through celite, followed by extraction with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=50:50→0:100) to give (5R)-5-[(E)-2-(5-cyclopropyl-6-methoxypyridin-2-yl)-2-(3,4-dichlorophenyl)ethenyl]pyrrolidin-2-one as a colorless amorphous (250 mg, 69%).

Workup

  1. filtrationthe insoluble matter was filtered off through celite
  2. extractionfollowed by extraction with ethyl acetate
  3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated under reduced pressure
  6. customThe resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=50:50→0:100)

Sources & evidence

ORD record
ord-46abfe357f1a462e887b20e9281d55dc
Source dataset
uspto-grants-2014_09
Patent number
US08822503B2

Reaction notes

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