2-(4,6-Difluoro-1-hydroxy-1-indanyl)acetic acid → (E)-2-(5-fluoro-1-indanylidene)acetic acid
Reaktionsgleichung
F[C:2]1[CH:10]=[C:9](F)[CH:8]=[C:7]2[C:3]=1[CH2:4][CH2:5]/[C:6]/2=[CH:12]\[C:13]([OH:15])=[O:14].[F:16]C1C=C(F)C=C2C=1CCC2(CC(O)=O)O>>[F:16][C:10]1[CH:2]=[C:3]2[C:7](=[CH:8][CH:9]=1)/[C:6](=[CH:12]/[C:13]([OH:15])=[O:14])/[CH2:5][CH2:4]2Komponenten
3
Versuchsvorschrift
This compound was prepared in an analogous manner to (E)-2-(4,6difluoro-1-indanylidene)acetic acid in Example 5e by substituting 2-(5-fluoro-1-hydroxy-1-indanyl)acetic acid(14.70 g, 0.069 mol) for 2-(4,6-difluoro-1-hydroxy-1-indanyl)acetic acid. Recrystallization from acetonitrile: 2-propanol mixtures gave 9.05 g (68%) of (E)-2-(5-fluoro-1-indanylidene)acetic acid as a white solid: m.p., 240°-242° C.;
Aufarbeitung
- customRecrystallization from acetonitrile