Steric Effects Are Not the Cause of the Rate Difference in Hydrolysis of Stereoisomeric Glycosides
作者:Henrik Helligsø Jensen、Mikael Bols
DOI:10.1021/ol030081e
日期:2003.9.1
substituents are more reactive than those with equatorial substituents was given in 1955 by Edward based on sterical hindrance being relieved in the transition state. Using model compounds 5, 6, 8, and 10, we here show conclusively that sterical hindrance is not the controlling factor in glycoside hydrolysis.
[结构:见正文]爱德华(Edward)于1955年根据在过渡状态中空间位阻得到缓解的观点,对为什么轴向取代基的糖苷比赤道取代基的糖苷具有更高的反应性做出了长期而合理的解释。我们使用模型化合物5、6、8和10得出结论,表明空间位阻不是糖苷水解的控制因素。