作者:Isaac Ghebre-Sellassie、Stanley L. Hem、Adelbert M. Knevel
DOI:10.1002/jps.2600730135
日期:1984.1
5R,6R-Benzylpenicilloic acid was found to epimerize slowly in alkaline media to 5S,6R-benzylpenicilloic acid until equilibrium was established. Epimerization proceeded via the imine tautomer of penamaldic acid rather than the enamine form and was found to favor the 5S,6R-epimer at equilibrium. The conversion process was monitored using both reverse-phase high-performance liquid chromatography and NMR
发现5R,6R-苄基青霉烯酸在碱性介质中缓慢地差向5S,6R-苄基青霉烯酸直至建立平衡。差向异构化是通过戊二酸的亚胺互变异构体而不是烯胺形式进行的,并且发现其在平衡时有利于5S,6R-顶基。使用反相高效液相色谱和NMR光谱监测转化过程。