Synthesis of Cephalosporin-Type Antibiotics by Coupling of Their β-Lactam Nucleus and Racemic Amino Acid Side Chains Using a Clathration-Induced Asymmetric Transformation
作者:Gerardus J. Kemperman、Jie Zhu、Antonius J. H. Klunder、Binne Zwanenburg
DOI:10.1002/1099-0690(200105)2001:10<1817::aid-ejoc1817>3.0.co;2-c
日期:2001.5
cephalosporin-type antibiotics Cephalexin, Cephradine and Cefadroxil have been prepared by coupling of their β-lactam nucleus and racemic amino acid side chain precursors. The initially obtained mixture of cephalosporin epimers is subjected to a clathration-induced asymmetric transformation which results in the epimerization of the epi-cephalosporin into the cephalosporin with the correct diastereomeric configuration
头孢菌素类抗生素头孢氨苄、头孢拉定和头孢羟氨苄是通过将它们的β-内酰胺核和外消旋氨基酸侧链前体偶联而成的。最初获得的头孢菌素差向异构体混合物经过包合诱导的不对称转化,导致表头孢菌素差向异构化为具有正确非对映体构型的头孢菌素。