Cesium carbonate → Tert-Butyl 4-[2-(4-methanesulfonylbenzoylamino)-pyridin-5-yl]-3,6-dihydro-2H-pyridine-1-carboxylate

HRID 42138

Reaktionsgleichung

Reaktionsgleichung von HRID 42138
Br[C:2]1[CH:3]=[CH:4][C:5]([NH:8][C:9](=[O:20])[C:10]2[CH:15]=[CH:14][C:13]([S:16]([CH3:19])(=[O:18])=[O:17])=[CH:12][CH:11]=2)=[N:6][CH:7]=1.CC1(C)C(C)(C)OB([C:29]2[CH2:30][CH2:31][N:32]([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[CH2:33][CH:34]=2)O1.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C)C=O.O.C1C=CC(P([C]2[CH][CH][CH][CH]2)C2C=CC=CC=2)=CC=1.C1C=CC(P([C]2[CH][CH][CH][CH]2)C2C=CC=CC=2)=CC=1.Cl[Pd]Cl.[Fe]>[CH3:19][S:16]([C:13]1[CH:14]=[CH:15][C:10]([C:9]([NH:8][C:5]2[CH:4]=[CH:3][C:2]([C:29]3[CH2:34][CH2:33][N:32]([C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[CH2:31][CH:30]=3)=[CH:7][N:6]=2)=[O:20])=[CH:11][CH:12]=1)(=[O:18])=[O:17]

Komponenten

7

Edukt 3

HCID 10796Cesium carbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 60650971N-(5-Bromopyridin-2-yl)-4-methanesulfonylbenzamide

Produkt 1

HCID 67083258Tert-Butyl 4-[2-(4-methanesulfonylbenzoylamino)-pyridin-5-yl]-3,6-dihydro-2H-pyridine-1-carboxylateAusbeute 22,4 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178477754HCID 178477754, VerbindungKatalysatorHCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

To a solution of N-(5-bromopyridin-2-yl)-4-methanesulfonylbenzamide (287 mg, 0.81 mmol) and tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-2H-pyridine-1-carboxylate (305 mg, 0.97 mmol) in dry N,N-dimethylformamide (10 mL) was added [1,1-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (complex with dichloromethane) (33 mg, 0.040 mmol) and cesium carbonate (527 mg, 1.6 mmol). The mixture was stirred at 90° C. overnight under N2, allowed to cool to room temperature, diluted with water (10 mL) and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=1/2) to give the title compound as a white crystal (83 mg, yield 22%).

Aufarbeitung

  1. temperatureto cool to room temperature
  2. extractionextracted with ethyl acetate
  3. washThe organic layer was washed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=1/2)

Quellen und Nachweise

ORD-Eintrag
ord-f4e9a30a2210477b8a0084f312a4c427
Quelldatensatz
uspto-grants-2013_09
Patentnummer
US08536176B2

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