A 2-azetidinone derivative having a group of the formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and each represents a hydrogen atom, alkyl, aryl or arylalkyl which may have a substituent at the 1-position and an amino group, at the 3-position, which may be acylated or protected, its salt or ester, and methods of producing the same, (1) a method comprising subjecting a 2-azetidinone derivative having a group of the formula ##STR2## wherein the symbols are as defined above at the 1-position and an amino group at the 3-position, its salt or ester to an acylation or protective-group introduction reaction, and (2) a method comprising reacting a 2-azetidinone derivative having a hydroxy group at the 1-position and an amino group, at the 3-position, which may be acylated or protected, or its salt with a compound of the formula ##STR3## wherein W is a halogen atom; other symbols are as defined above, its salt or ester. The above objective compounds are utilizable as excellent antimicrobial agents or as valuable intermediates for the synthesis of the same.
一种2-
吡咯酮衍
生物,具有以下式子的基团:##STR1## 其中R.sup.1和R.sup.2相同或不同,分别代表氢原子,烷基,芳基或芳基烷基,可以在1-位取代基,并且在3-位具有
氨基,可以酰化或保护,其盐或酯,以及制备其的方法,包括:(1)将具有以下式子的2-
吡咯酮衍
生物进行酰化或保护基引入反应:##STR2## 其中符号如上定义,在1-位有取代基,在3-位有
氨基,其盐或酯;(2)将具有1-位羟基和在3-位具有
氨基的2-
吡咯酮衍
生物或其盐与以下式子的化合物反应:##STR3## 其中W是卤素原子; 其他符号如上定义,其盐或酯。以上目标化合物可用作优异的抗微
生物剂或用于合成相同的有价值的中间体。