HCID 14650456, Verbindung → HCID 14650449, Verbindung

HRID 1200193Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1200193
[C:1]1([C:7]2[O:8][C:9]3[C:17]([CH2:18][C:19]([O:21]CC)=[O:20])=[CH:16][CH:15]=[CH:14][C:10]=3[C:11](=[O:13])[CH:12]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH:2]=1>C(O)(=O)C.O>[C:1]1([C:7]2[O:8][C:9]3[C:17]([CH2:18][C:19]([OH:21])=[O:20])=[CH:16][CH:15]=[CH:14][C:10]=3[C:11](=[O:13])[CH:12]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH:2]=1

Komponenten

4

Edukt 1

HCID 14650456HCID 14650456, Verbindung

Produkt 1

HCID 14650449HCID 14650449, VerbindungAusbeute 68 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 176Acetic AcidLösungsmittelHCID 962WaterLösungsmittel

Versuchsvorschrift

Ethyl [2-(1-cyclohexenyl)-4-oxo-4H-[1]-benzopyran-8-yl]acetate (2.5 g) was dissolved in acetic acid (35 ml) and to the solution was added 50% sulfulic acid (30 ml). The mixture was relfuxed for 4 hours. The reaction mixture was diluted with water and crystals deposited were filtered off and recrystallized from the mixed solvent of ethyl acetate and methanol to obtain the title compound, yield 68%.

Aufarbeitung

  1. filtrationdeposited were filtered off
  2. customrecrystallized from the mixed solvent of ethyl acetate and methanol

Quellen und Nachweise

ORD-Eintrag
ord-86bfc59aafc7461d8d9bfb6f89c8fc53
Quelldatensatz
uspto-grants-1990_02
Patentnummer
US04904690

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