Solketal → 2,2-Dimethyl-1,3-dioxolan-4-ylmethyl [2-(1-cyclohexenyl)-4-oxo-4H-[1]-benzopyran-8-yl]acetate

HRID 1200192Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1200192
[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.[CH3:22][C:23]1([CH3:30])[O:27][CH:26]([CH2:28]O)[CH2:25][O:24]1.C1(N=C=NC2CCCCC2)CCCCC1>ClCCl>[C:1]1([C:7]2[O:8][C:9]3[C:17]([CH2:18][C:19]([O:21][CH2:28][CH:26]4[CH2:25][O:24][C:23]([CH3:30])([CH3:22])[O:27]4)=[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

5

Edukt 3

HCID 7528SolketalHCID 10868DicyclohexylcarbodiimideHCID 14650449HCID 14650449, Verbindung

Produkt 1

HCID 536602762,2-Dimethyl-1,3-dioxolan-4-ylmethyl [2-(1-cyclohexenyl)-4-oxo-4H-[1]-benzopyran-8-yl]acetateAusbeute 67 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

[2-(1-Cyclohexenyl)-4-oxo-4H-[1]-benzopyran-8-yl]acetic acid (2.84 g), 2,2-dimethyl-1,3-dioxolan-4-methanol (3.96 g) and dicyclohexylcarbodiimide (2.28 g) were added to dichloromethane (30 ml) with ice cooling and then the mixture was stirred at room temperature for 18 hours. The mixture was concentrated under reduced pressure and the residue was purified by silica gel column chromatography to obtain the title compound (2.65 g), yield 67%, m.p. 104°-105° C. (recrystallized from ethyl acetate).

Aufarbeitung

  1. concentrationThe mixture was concentrated under reduced pressure
  2. customthe residue was purified by silica gel column chromatography
  3. customto obtain
  4. customthe title compound (2.65 g), yield 67%, m.p. 104°-105° C. (recrystallized from ethyl acetate)

Quellen und Nachweise

ORD-Eintrag
ord-313761d85bee4237925d88cd454d8320
Quelldatensatz
uspto-grants-1990_02
Patentnummer
US04904690

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