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Potassium Carbonate → tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-3,6-dihydro-1(2H)-pyridinecarboxylate

HRID 1269175
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1269175
CC1(C)C(C)(C)OB([C:9]2[CH2:10][CH2:11][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:13][CH:14]=2)O1.C([O-])([O-])=O.[K+].[K+].Br[C:30]1[C:31]([F:43])=[CH:32][C:33]([F:42])=[C:34]([NH:36][C:37](=[O:41])[CH:38]([CH3:40])[CH3:39])[CH:35]=1>CN(C=O)C>[F:43][C:31]1[CH:32]=[C:33]([F:42])[C:34]([NH:36][C:37](=[O:41])[CH:38]([CH3:39])[CH3:40])=[CH:35][C:30]=1[C:9]1[CH2:10][CH2:11][N:12]([C:15]([O:17][C:18]([CH3:19])([CH3:20])[CH3:21])=[O:16])[CH2:13][CH:14]=1
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Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 16757161N-(5-bromo-2,4-difluorophenyl)-2-methylpropanamide

Produkt 1

HCID 16756286tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-3,6-dihydro-1(2H)-pyridinecarboxylateAusbeute 59 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228
Dimethylformamide
Lösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To a 250-mL RB flask containing tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-1(2H)-pyridinecarboxylate (3.31 g, 10.7 mmol), K2CO3 (4.44 g, 32.1 mmol) and PdCl2dppf (870 mg, 1.07 mmol) was added a solution of N-(5-bromo-2,4-difluorophenyl)-2-methylpropanamide (3.28 g, 11.8 mmol) in DMF (100 mL) at room temperature under argon. The mixture was heated to 80° C. under argon overnight, cooled to room temperature, filtered through celite and the celite was washed with EtOAc (3×20 mL). The filtrates were washed with H2O (20 mL), brine (20 mL), dried over MgSO4, filtered and concentrated in vacuo. The crude material was purified by flash chromatography (10%–20% EtOAc/hexane) to give 2.4 g (6.31 mmol, 59%) of tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-3,6-dihydro-1(2H)-pyridine carboxylate: ESMS m/e: 379.3 (M−H)+.

Aufarbeitung

  1. temperaturecooled to room temperature
  2. filtrationfiltered through celite
  3. washthe celite was washed with EtOAc (3×20 mL)
  4. washThe filtrates were washed with H2O (20 mL), brine (20 mL)
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe crude material was purified by flash chromatography (10%–20% EtOAc/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-16f613aeaf754373a8ed5c91ef5bbfd7
Quelldatensatz
uspto-grants-2007_04
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07199135B2

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