Dichloromethane → 5,7-Difluoro-3-iodo-1-(phenylsulfonyl)-1H-indole

HRID 1272235

Reaktionsgleichung

Reaktionsgleichung von HRID 1272235
[I:1]Cl.C(Cl)Cl.[F:6][C:7]1[CH:8]=[C:9]2[C:13](=[C:14]([F:16])[CH:15]=1)[NH:12][CH:11]=[CH:10]2.[C:17]1([S:23](Cl)(=[O:25])=[O:24])[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>N1C=CC=CC=1.C1(C)C=CC=CC=1.[OH-].[Na+].[Br-].C([N+](CCCC)(CCCC)CCCC)CCC>[C:17]1([S:23]([N:12]2[C:13]3[C:9](=[CH:8][C:7]([F:6])=[CH:15][C:14]=3[F:16])[C:10]([I:1])=[CH:11]2)(=[O:25])=[O:24])[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Komponenten

9

Edukt 4

HCID 6344DichloromethaneHCID 7369Benzenesulfonyl chlorideHCID 24640Iodine chlorideHCID 27787305,7-difluoro-1H-indole

Produkt 1

HCID 220147845,7-Difluoro-3-iodo-1-(phenylsulfonyl)-1H-indoleAusbeute 87 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 74236Tetrabutylammonium BromideKatalysatorHCID 1049PyridineLösungsmittelHCID 1140TolueneLösungsmittel2×HCID 14798Sodium HydroxideLösungsmittel

Versuchsvorschrift

The 1.0 M ICl in CH2Cl2 (43 ml, 43 mmol) is added to a solution of 5,7-difluoro-indole (6 g, 39 mmol) in 35 ml pyridine under N2 at 0° C. and the resulting mixture is stirred for 30 minutes. The reaction is diluted with toluene and washed with brine, 1N HCl, 1N NaOH, dried (Na2SO4), filtered and concentrated. The crude 3-iodo-5,7-difluoroindole is stirred in toluene (85 ml) and 5 N NaOH (70 ml), tetrabutylammonium bromide (1.25 g, 3.9 mmol), then benzenesulfonyl chloride (6.2 ml, 48 mmol) are added and the resulting mixture is stirred 24 hours. The two phase reaction mixture is diluted with toluene, washed with brine, dried (Na2SO4), filtered, concentrated and the residue is triturated with diethyl ether/petroleum ether. The resulting solid is filtered to give 14.2 g of N-Benzenesulfonyl-3-iodo-5,7-difluoroindole (87%).

Aufarbeitung

  1. washwashed with brine, 1N HCl, 1N NaOH
  2. dry with materialdried (Na2SO4)
  3. filtrationfiltered
  4. concentrationconcentrated
  5. stirringThe crude 3-iodo-5,7-difluoroindole is stirred in toluene (85 ml)
  6. stirringthe resulting mixture is stirred 24 hours
  7. customThe two phase reaction mixture
  8. washwashed with brine
  9. dry with materialdried (Na2SO4)
  10. filtrationfiltered
  11. concentrationconcentrated
  12. customthe residue is triturated with diethyl ether/petroleum ether
  13. filtrationThe resulting solid is filtered

Quellen und Nachweise

ORD-Eintrag
ord-940f13e358e24caa9cd489bc6fd36e80
Quelldatensatz
uspto-grants-2007_04
Patentnummer
US07208505B2

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