Correlation between optical rotation sign and conformation of γ-butyrolactones. An empirical correlation rule to predict optical activity and stereochemistry of γ-butyrolactones
作者:Fu-An Kang、Cheng-Lie Yin
DOI:10.1016/s0040-4020(98)00817-5
日期:1998.10
series of trans-4,5-disubstituted-γ-butyrolactones are found to adopt different conformations by 1H NMR spectroscopy, whose optical rotation signs are found to depend on the conformations they assume. An empirical correlation rule is proposed for the prediction of optical activity and stereochemistry of γ-butyrolactones, which is confirmed by the X-ray analyses of (+)- and (−)-γ-butyrolactones.
通过1 H NMR光谱发现一系列反式-4,5-二取代-γ-丁内酯采用不同的构象,发现其旋光度取决于它们所假定的构象。提出了经验相关规则用于预测γ-丁内酯的旋光性和立体化学,这通过(+)-和(-)-γ-丁内酯的X射线分析得到了证实。