Methanol → N-[3-(1,3-dioxolyl)phenyl]isatin

HRID 11202

Reaktionsgleichung

Reaktionsgleichung von HRID 11202
[NH:1]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:4](=[O:5])[C:2]1=[O:3].[H-].[Na+].Br[C:15]1[CH:16]=[C:17]([CH:21]2[O:25][CH2:24][CH2:23][O:22]2)[CH:18]=[CH:19][CH:20]=1.CO>CN(C=O)C.C(Cl)(Cl)Cl.[Cu]I>[O:22]1[CH:23]=[CH:24][O:25][CH:21]1[C:17]1[CH:16]=[C:15]([N:1]2[C:11]3[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=3)[C:4](=[O:5])[C:2]2=[O:3])[CH:20]=[CH:19][CH:18]=1

Komponenten

8

Edukt 4

HCID 887MethanolHCID 7054IsatinHCID 24758Sodium hydrideHCID 873062-(3-Bromophenyl)-1,3-dioxolane

Produkt 1

HCID 21972258N-[3-(1,3-dioxolyl)phenyl]isatin

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)KatalysatorHCID 6212ChloroformLösungsmittel2×HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

Isatin (3.2 g, 0.0218 mol) was dissolved in anhydrous DMF (75 ml) and cooled in an ice-bath under a nitrogen atmosphere. To this cold solution, sodium hydride (0.575 g, 0.0239 mol) was added and the reaction was stirred at 0° C. for 1.5 hours. This solution was then treated with 2-(3-bromophenyl)-1,3-dioxolane (5 g, 1 equivalent) followed by CuI (8.3 g, 2 equivalents). The resulting suspension was heated in an oil-bath under nitrogen at 130–140° C. for 16 hours. It was then cooled to room temperature and diluted with an equal volume of chloroform. This suspension was filtered and the filtrate was concentrated under reduced pressure. A viscous brown oil was recovered which was suspended in xylenes (150 ml) wand evaporated to dryness. The residue was used as such for the next reaction. TLC (5% methanol in chloroform) showed clean conversion; Rf (product)=0.86.

Aufarbeitung

  1. temperaturecooled in an ice-bath under a nitrogen atmosphere
  2. temperatureThe resulting suspension was heated in an oil-bath under nitrogen at 130–140° C. for 16 hours
  3. temperatureIt was then cooled to room temperature
  4. filtrationThis suspension was filtered
  5. concentrationthe filtrate was concentrated under reduced pressure
  6. customA viscous brown oil was recovered which
  7. customwand evaporated to dryness
  8. customsuch for the next reaction

Quellen und Nachweise

ORD-Eintrag
ord-0e3a377f9f97467ab5412975fa58ae7c
Quelldatensatz
uspto-grants-2006_08
Patentnummer
US07097995B2

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