Lithium Hydroxide → (S)-2-ethoxy-3-[2-methyl-4-(5-methyl-2-phenyl-oxazol-4-ylmethoxy)-phenyl]-propionic acid
Reaktionsgleichung
C[O:2][C:3](=[O:30])[C@@H:4]([O:27][CH2:28][CH3:29])[CH2:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH2:13][C:14]2[N:15]=[C:16]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)[O:17][C:18]=2[CH3:19])=[CH:8][C:7]=1[CH3:26].[Li+].[OH-]>>[CH2:28]([O:27][C@@H:4]([CH2:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH2:13][C:14]2[N:15]=[C:16]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)[O:17][C:18]=2[CH3:19])=[CH:8][C:7]=1[CH3:26])[C:3]([OH:30])=[O:2])[CH3:29]Komponenten
3
Versuchsvorschrift
In analogy to the procedure described in example 1 g], (S)-2-ethoxy-3-[2-methyl-4-(5-methyl-2-phenyl-oxazol-4-ylmethoxy)-phenyl]-propionic acid methyl ester was treated with LiOH to obtain (S)-2-ethoxy-3-[2-methyl-4-(5-methyl-2-phenyl-oxazol-4-ylmethoxy)-phenyl]-propionic acid as colorless solid, which was crystalized from hexane/dichloromethane to afford colorless crystals. According to chiral HPLC of the corresponding methyl ester (Chiralcel-OJ), the enantiomeric excess amounts to 99.0%.
Quellen und Nachweise
- ORD-Eintrag
- ord-11e3acde434a4d21b03e6b0d34b93ad3
- Quelldatensatz
- uspto-grants-2008_03
- Patentnummer
- US07348349B2
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