Potassium Carbonate → 3-{[4-(5-Fluoro-1H-indol-3-yl)-3,6-dihydro-1(2H)-pyridinyl]methyl}-2,3-dihydro{1,4]dioxino[2,3-b]pyridine

HRID 431065

Reaktionsgleichung

Reaktionsgleichung von HRID 431065
[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][CH:6]=[C:5]2[C:11]1[CH2:12][CH2:13][NH:14][CH2:15][CH:16]=1.Br[C:18]1[C:23]([O:24][CH2:25][C@@H:26]2[CH2:28][O:27]2)=[CH:22][CH:21]=[CH:20][N:19]=1.CC1C=CC(P(C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC(C)=CC=2)C2C=CC(C)=CC=2)C2C=CC(C)=CC=2)=CC=1.C(=O)([O-])[O-].[K+].[K+]>CS(C)=O.C1(C)C=CC=CC=1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][CH:6]=[C:5]2[C:11]1[CH2:12][CH2:13][N:14]([CH2:28][CH:26]2[O:27][C:18]3=[N:19][CH:20]=[CH:21][CH:22]=[C:23]3[O:24][CH2:25]2)[CH2:15][CH:16]=1

Komponenten

8

Edukt 4

HCID 11430Potassium CarbonateHCID 4189906(S)-(-)-2,2'-Bis(di-p-tolylphosphino)-1, 1'-binaphthylHCID 113449595-fluoro-3-(1,2,3,6-tetrahydropyridin-4-yl)-1H-indoleHCID 120981832-bromo-3-[(2S)-oxiranylmethoxy]pyridine

Produkt 1

HCID 99290483-{[4-(5-Fluoro-1H-indol-3-yl)-3,6-dihydro-1(2H)-pyridinyl]methyl}-2,3-dihydro{1,4]dioxino[2,3-b]pyridineAusbeute 33 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 167845palladium(II) acetateKatalysatorHCID 679Dimethyl SulfoxideLösungsmittelHCID 1140TolueneLösungsmittel

Reaktionsbedingungen

Temperatur
77.5 °C

Versuchsvorschrift

5-Fluoro-3-(1,2,3,6-tetrahydro-4-pyridinyl)-1H-indole (1.16 g, 5.37 mmole) and 2-bromo-3-[(2S)-oxiranylmethoxy]pyridine (0.83 g, 3.6 mmole) were combined in DMSO (40 mL). This solution was heated at 75-80° C. under nitrogen for 5 hours. After completion, the reaction was cooled to room temperature and partitioned between 250 mL each of ethyl acetate and saturated sodium bicarbonate. The organic phase was washed with brine, dried over magnesium sulfate and concentrated in vacuum. The crude residue was column chromatographed on silica gel using first methylene chloride as eluant to remove impurities and then 3% MeOH/CH2Cl2 to elute the product, which was a yellow solid (0.90 g, 56%). The intermediate (0.90 g, 2.01 mmole) was then cyclized in toluene (40 mL) in the presence of palladium (II) acetate (0.02 g, 0.09 mmole), (S)-(−)-2,2′-bis(di-p-tolylphosphino)-1,1′-binaphthyl (0.085 g, 0.12 mmole), and potassium carbonate (0.33 g, 2.4 mmole). The heterogeneous mixture was heated to 100° C. for a period of 24 hours. After the mixture cooled to room temperature, the catalysts were removed by filtration and the filtrate was concentrated in vacuum. The resulting crude brown oil was then column chromatographed on silica gel with 3% methanol in methylene chloride to give the desired product as a brown oil (0.23 g, 33%). The oil was crystallized from ethanol with the addition of a solution of oxalic acid (0.05 g) in hot ethanol to give 0.24 g of the (S)-enantiomer of the title compound as a white solid hemioxalate, m.p. 124° C.

Aufarbeitung

  1. temperatureAfter completion, the reaction was cooled to room temperature
  2. custompartitioned between 250 mL each of ethyl acetate and saturated sodium bicarbonate
  3. washThe organic phase was washed with brine
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated in vacuum
  6. customchromatographed on silica gel using first methylene chloride as eluant
  7. customto remove impurities
  8. wash3% MeOH/CH2Cl2 to elute the product, which
  9. temperatureThe heterogeneous mixture was heated to 100° C. for a period of 24 hours
  10. temperatureAfter the mixture cooled to room temperature
  11. customthe catalysts were removed by filtration
  12. concentrationthe filtrate was concentrated in vacuum
  13. customcolumn chromatographed on silica gel with 3% methanol in methylene chloride

Quellen und Nachweise

ORD-Eintrag
ord-622ebdefeee740d38faa25627b26e899
Quelldatensatz
uspto-grants-2003_12
Patentnummer
US06656950B2

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