.beta.-N-substituted aminothiol ester represented by the general formual (I): ##STR1## wherein R.sup.1 is an alkyl group or an aryl group and R.sup.2 is an aralkyl group, a process for preparing the same, and an azetidinone derivative represented by the general formula (VI): ##STR2## wherein R.sup.2 is as above. The .beta.-N-substituted aminothiol ester (I) of the present invention can be an excellent intermediate for preparing the .beta.-lactam (II).
本发明涉及一种由一般式(I)表示的.beta.-N取代
氨基
硫酯酯,其中R.sup.1是烷基或芳基,R.sup.2是芳基烷基,以及一种由一般式(VI)表示的氮杂环
丙酮衍
生物,其中R.sup.2与上述相同。本发明的.beta.-N取代
氨基
硫酯酯(I)可作为制备.beta.-内酰胺(II)的优良中间体。制备方法未在文中阐述。