(E)-5,5-bis(4-chlorophenyl)-2,4-pentadienoic acid ethyl ester → (E)-5,5-bis(4-chlorophenyl)-2,4-pentadienoic acid

HRID 1110512Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1110512
C([O:3][C:4](=[O:23])/[CH:5]=[CH:6]/[CH:7]=[C:8]([C:16]1[CH:21]=[CH:20][C:19]([Cl:22])=[CH:18][CH:17]=1)[C:9]1[CH:14]=[CH:13][C:12]([Cl:15])=[CH:11][CH:10]=1)C>CO.[OH-].[Na+]>[Cl:15][C:12]1[CH:11]=[CH:10][C:9]([C:8]([C:16]2[CH:17]=[CH:18][C:19]([Cl:22])=[CH:20][CH:21]=2)=[CH:7]/[CH:6]=[CH:5]/[C:4]([OH:23])=[O:3])=[CH:14][CH:13]=1

Komponenten

4

Edukt 1

HCID 14347256(E)-5,5-bis(4-chlorophenyl)-2,4-pentadienoic acid ethyl ester

Produkt 1

HCID 14347245(E)-5,5-bis(4-chlorophenyl)-2,4-pentadienoic acidAusbeute 95 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 14798Sodium HydroxideLösungsmittel

Versuchsvorschrift

A mixture of (E)-5,5-bis(4-chlorophenyl)-2,4-pentadienoic acid ethyl ester (7.5 g) in methanol (30 mL) and 2N sodium hydroxide solution (15 mL) was heated at reflux for 30 minutes. The crude solid obtained from the usual work up, was crystallized from ether-hexane to yield 6.55 g of (E)-5,5-bis(4-chlorophenyl)-2,4-pentadienoic acid, mp 213°-215° C. Recrystallization of a portion from 2-propanol furnished the analytical sample, mp 214°-215° C. Anal. Calculated for C17H12Cl2O2 : C, 63.97; H, 3.79; Cl. 22.21 Found: C, 63.80; H, 3.90; Cl, 21.99.

Aufarbeitung

  1. temperaturewas heated
  2. temperatureat reflux for 30 minutes
  3. customThe crude solid obtained from the usual work up,
  4. customwas crystallized from ether-hexane

Quellen und Nachweise

ORD-Eintrag
ord-56b8a04d912f4b879573f3012812d79f
Quelldatensatz
uspto-grants-1990_12
Patentnummer
US04975438

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