Diazomethane → Methyl 2-[4-(4-chlorophenyl)benzyloxy]-3,3,3-trifluoro-2-trifluoromethylpropionate
Reaktionsgleichung
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:27]=[CH:26][C:11]([CH2:12][O:13][C:14]([C:22]([F:25])([F:24])[F:23])([C:18]([F:21])([F:20])[F:19])[C:15]([OH:17])=[O:16])=[CH:10][CH:9]=2)=[CH:4][CH:3]=1.[N+](=[CH2:30])=[N-]>>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:9]=[CH:10][C:11]([CH2:12][O:13][C:14]([C:18]([F:19])([F:20])[F:21])([C:22]([F:23])([F:24])[F:25])[C:15]([O:17][CH3:30])=[O:16])=[CH:26][CH:27]=2)=[CH:4][CH:3]=1Komponenten
3
Versuchsvorschrift
A solution of 2-[4-(4-chlorophenyl)benzyloxy]-3,3,3-trifluoro-2-trifluoromethylpropionic acid (1.2 g.) in either (20 ml.) is treated at 0° C. with an excess of an ethereal solution of diazomethane. The solution is evaporated, and the residue is recrystallised from light petroleum (b.p. 40°-60° C.) to give methyl 2-[4(4-chlorophenyl)benzyloxy]-3,3,3-trifluoro-2-trifluoromethylpropionate (1.1 g.), m.p. 61.5°-62.5° C.
Aufarbeitung
- customThe solution is evaporated