Potassium Hydroxide → 2-[4-(4-Chlorophenyl)-benzyloxy]-2-phenylpropionic acid
Reaktionsgleichung
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:28]=[CH:27][C:11]([CH2:12][O:13][C:14]([C:21]3[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=3)([CH3:20])[C:15]([O:17]CC)=[O:16])=[CH:10][CH:9]=2)=[CH:4][CH:3]=1.[OH-].[K+]>CO>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:28]=[CH:27][C:11]([CH2:12][O:13][C:14]([C:21]3[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=3)([CH3:20])[C:15]([OH:17])=[O:16])=[CH:10][CH:9]=2)=[CH:4][CH:3]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A solution of ethyl 2-[4-(4-chlorophenyl)benzyloxy]-2-phenylpropionate (7.9 g.) in methanol (100 ml.) containing potassium hydroxide (11.0 g.) was heated under reflux for 2 hours and then evaporated. The residue was partitioned between water (100 ml.) and ether (30 ml.). The aqueous phase was separated and acidified with 4 N-hydrochloric acid to pH 2-3 and extracted with ether (3×30 ml.). These ether extracts were washed with water, dried (MgSO4) and evaporated. The residue was crystallised by treatment with a mixture of ethyl acetate and hexane to give 2-[4-(4-chlorophenyl)-benzyloxy]-2-phenylpropionic acid, (3.5 g.), m.p. 125°-126° C.