electron-withdrawing groups E, E′ (E: CN, CO2Me, COR, SO2R, etc; E′: CN, CO2Me) are prepared. Application of the methodology, the determination of stereochemistry and the degree of racemization of some amino acids are discussed.
                                    从
硫酰胺4,经由
硫亚胺盐5,具有不同吸电子基团E,E'(E:CN,CO 2 Me,COR,SO 2 R等; E':CN,CO 2 Me)的各种双官能化烯胺6是准备好了。讨论了该方法的应用,立体
化学的确定以及某些
氨基酸的外消旋程度。