The stereoselectivity of asymmetric transformation of 2-substituted alkanoic acids via oxazolines was clarified by measuring the isomeric ratio of 13C-labeled lithio oxazolines by 13C NMR. The mechanism of the process was discussed from substituent effects of the oxazoline ring and solvent effects on the transformation.
                                    通过13C NMR测量13C标记的
锂唑啉的同分异构体比率,阐明了2-取代烷酸通过唑啉进行不对称转化的立体选择性。从唑啉环的取代效应和溶剂对转化的影响讨论了该过程的机理。