Cefadroxil → Cefadroxil Monohydrate
Reaktionsgleichung
[CH3:1][C:2]1[CH2:22][S:21][C@@H:5]2[C@H:6]([NH:9][C:10]([C@H:12]([NH2:20])[C:13]3[CH:14]=[CH:15][C:16]([OH:19])=[CH:17][CH:18]=3)=[O:11])[C:7](=[O:8])[N:4]2[C:3]=1[C:23]([OH:25])=[O:24]>CN(C)C=O>[CH3:1][C:2]1[CH2:22][S:21][C@@H:5]2[C@H:6]([NH:9][C:10]([C@H:12]([NH2:20])[C:13]3[CH:14]=[CH:15][C:16]([OH:19])=[CH:17][CH:18]=3)=[O:11])[C:7](=[O:8])[N:4]2[C:3]=1[C:23]([OH:25])=[O:24].[CH3:1][C:2]1[CH2:22][S:21][C@@H:5]2[C@H:6]([NH:9][C:10]([C@H:12]([NH2:20])[C:13]3[CH:18]=[CH:17][C:16]([OH:19])=[CH:15][CH:14]=3)=[O:11])[C:7](=[O:8])[N:4]2[C:3]=1[C:23]([OH:25])=[O:24].[OH2:8]Komponenten
4
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
By employing the preferred reaction conditions described above, the present invention makes possible the production of primary grade cefadroxil in yields of up to about 90% (activity yield) and subsequent conversion of said cefadroxil or its dimethylformamide solvate to cefadroxil monohydrate in activity yields of up to about 83%. Overall yields of cefadroxil monohydrate from 7-ADCA range up to about 75% without taking into account the addition ~ 5% yield possible if a second crop of monohydrate is recovered from the crystallization mother liquor as described below in Example 5.