Dichloromethane → [5-(9H-carbazol-4-yl)pyridin-2-yl]methanol

HRID 1877456

Reaktionsgleichung

Reaktionsgleichung von HRID 1877456
[OH:1][CH2:2][C:3]1[N:8]=[CH:7][C:6](B(O)O)=[CH:5][CH:4]=1.C(=O)([O-])[O-].[Cs+].[Cs+].ClCCl.FC(F)(F)S(O[C:27]1[C:39]2[C:38]3[C:33](=[CH:34][CH:35]=[CH:36][CH:37]=3)[NH:32][C:31]=2[CH:30]=[CH:29][CH:28]=1)(=O)=O>O1CCOCC1.O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH:30]1[C:31]2[NH:32][C:33]3[C:38](=[CH:37][CH:36]=[CH:35][CH:34]=3)[C:39]=2[C:27]([C:6]2[CH:5]=[CH:4][C:3]([CH2:2][OH:1])=[N:8][CH:7]=2)=[CH:28][CH:29]=1

Komponenten

8

Edukt 4

HCID 6344DichloromethaneHCID 10796Cesium carbonateHCID 441182556-(Hydroxymethyl)pyridine-3-boronic acidHCID 583383234-Trifluoromethanesulphonyloxycarbazole

Produkt 1

HCID 67308755[5-(9H-carbazol-4-yl)pyridin-2-yl]methanolAusbeute 47,4 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)KatalysatorHCID 962WaterLösungsmittelHCID 312751,4-DioxaneLösungsmittel

Versuchsvorschrift

0.54 g of [6-(hydroxymethyl)pyridin-3-yl]boronic acid, 3.3 g of caesium carbonate and 93 mg of 1,1′-bis(diphenylphosphino)ferrocenepalladium(II) dichloride as a complex with dichloromethane (1/1) [PdCl2(dppO'CH2Cl2] are successively added, under argon, to a solution of 0.8 g of 4-trifluoromethanesulphonyloxycarbazole, obtained in stage 1 of Example 1, in a mixture of 37 ml of dioxane and 12 ml of water. The reaction mixture is refluxed for 5 hours, cooled to ambient temperature and concentrated under reduced pressure. The residue is subsequently taken up with a mixture of dichloromethane and ethyl acetate, treated with carbon black, filtered through celite and concentrated under reduced pressure. The residue is purified by silica gel chromatography, elution being carried out with a mixture of cyclohexane and ethyl acetate (55/45 by volume), so as to give 0.33 g of [5-(9H-carbazol-4-yl)pyridin-2-yl]methanol in the form of a colourless oil, the characteristics of which are the following:

Aufarbeitung

  1. temperatureThe reaction mixture is refluxed for 5 hours
  2. concentrationconcentrated under reduced pressure
  3. additionThe residue is subsequently taken up with a mixture of dichloromethane and ethyl acetate
  4. additiontreated with carbon black
  5. filtrationfiltered through celite and
  6. concentrationconcentrated under reduced pressure
  7. customThe residue is purified by silica gel chromatography, elution
  8. additionbeing carried out with a mixture of cyclohexane and ethyl acetate (55/45 by volume)

Quellen und Nachweise

ORD-Eintrag
ord-07590bc6edc9417d90f7d425d358aa4b
Quelldatensatz
uspto-grants-2012_11
Patentnummer
US08309721B2

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