Acetic Acid → HCID 22561914, Verbindung

HRID 983029Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 983029
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]2[CH:19]=[CH:18][CH:17]=[C:16]3[C:12]=2[CH:13]=[CH:14][NH:15]3)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].C([OH:22])C.C(O)(=O)C.[Br-].[Br-].[Br-].[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1>CC(O)(C)C.[Zn].O>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]2[CH:19]=[CH:18][CH:17]=[C:16]3[C:12]=2[CH2:13][C:14](=[O:22])[NH:15]3)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10]

Komponenten

8

Edukt 4

HCID 176Acetic Acid2×HCID 702EthanolHCID 21124087PyridiniumtribromideHCID 225616844-(3,4-dimethoxy-phenyl)1H-indole

Produkt 1

HCID 22561914HCID 22561914, VerbindungAusbeute 65 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 23994ZincKatalysatorHCID 962WaterLösungsmittelHCID 6386tert-ButanolLösungsmittel

Versuchsvorschrift

To the suspension of 4-(3,4-dimethoxy-phenyl)-1H-indole (14.7 g, 58 mmol) in t-BuOH: ethanol: acetic acid (367 mL: 217 mL: 113 mL) was added pyridinium tribromide (55.68 g, 174 mmol) portionwise. The mixture was stirred at room temperature for 3 hours, and then to the mixture was added more acetic acid (287 mL). Zinc dust (18.95 g, 290 mmol) was added to the reaction mixture portionwise. After stirring for one hour, water was added to the reaction. The unreacted zinc was filtered off and most of the solvent was removed under reduced pressure. The residue was diluted with ethyl acetate, washed with water (6×), sat. NaHCO3 (2×), brine (3×), dried over Na2SO4, concentrated and triturated with ether to give 10.14 g (65%) of 4-(3,4-dimethoxy-phenyl)-1,3-dihydro-indol-2-one as an earth colored solid.

Aufarbeitung

  1. stirringAfter stirring for one hour
  2. filtrationThe unreacted zinc was filtered off and most of the solvent
  3. customwas removed under reduced pressure
  4. additionThe residue was diluted with ethyl acetate
  5. washwashed with water (6×), sat. NaHCO3 (2×), brine (3×)
  6. dry with materialdried over Na2SO4
  7. concentrationconcentrated
  8. customtriturated with ether

Quellen und Nachweise

ORD-Eintrag
ord-92d31f892f444d61b8be89c4eb00fc2e
Quelldatensatz
uspto-grants-2005_03
Patentnummer
US06861418B2

Notizen zur Reaktion

Wird geladen…