Antibacterial carbapenem compounds represented by the general formula ##STR1## wherein X is hydrogen or alkyl, A is hydrogen or alkyl, R is hydrogen or a monovalent substituent and COB is carboxy, its pharmaceutically acceptable ester or its alkali metal salt are prepared from the suitably substituted monocyclic 2-azetidinone by a Wittig cyclization or carbene-insertion cyclization to give Compounds(I) or by cleaving the dioxolane ring of above Compounds(I) with a strong base e.g. DEN or DBU to give above Compounds(II). Some other alterations of COB, R and side chain structure are also disclosed.
抗菌碳青霉烯化合物的一般公式表示为##STR1##其中X为氢或烷基,A为氢或烷基,R为氢或一价取代基,COB为羧基,其药用可接受的酯或碱
金属盐是通过适当取代的单环2-氮杂环
丙酮经过Wittig环化或卡宾插入环化制备得到化合物(I),或者通过用强碱如DEN或
DBU裂解上述化合物(I)的二氧李环来得到上述化合物(II)。还公开了COB、R和侧链结构的一些其他改变。