Bicyclolactone compounds represented by the formula (I) ##STR1## wherein R.sup.1 represents an alkyl group having 1 to 4 carbon atoms, R.sup.2 represents a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms and R.sup.3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; .gamma.-lactone sulfide or sulfoxide compounds represented by the formula (II) ##STR2## wherein R.sup.2 and R.sup.3 are as defined above, R.sup.4 represents a hydrogen atom or a --COOR.sup.1 group wherein R.sup.1 is as defined above, R.sup.5 represents a hydrogen atom or a --CH.sub.2 --Y--(CH.sub.2).sub.n --COOR.sup.6 group wherein Y represents a --CH.sub.2 CH.sub.2 -- group or a --CH.dbd.CH-- group, R.sup.6 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and n is an integer of 0 to 6, R.sup.7 represents an alkyl group having 1 to 4 carbon atoms or an aryl group and m is 0 or 1, useful as precursors for prostaglandin analogues; and process for preparing the same.
公式(I)所代表的是Bicyclolactone化合物,其结构式为 ##STR1## 其中R.sup.1代表碳数为1至4的烷基,R.sup.2代表碳数为1至8的取代或未取代烷基,R.sup.3代表氢原子或碳数为1至4的烷基。 公式(II)所代表的是γ-内酯
硫醚或
硫氧化物化合物,其结构式为 ##STR2## 其中R.sup.2和R.sup.3的定义如上所述,R.sup.4代表氢原子或--COOR.sup.1基团,其中R.sup.1的定义如上所述,R.sup.5代表氢原子或--CH.sub.2--Y--(CH.sub.2).sub.n--COOR.sup.6基团,其中Y代表--CH.sub.2CH.sub.2--基团或--CH.dbd.CH--基团,R.sup.6代表氢原子或碳数为1至4的烷基,n为0至6的整数,R.sup.7代表碳数为1至4的烷基或芳基,m为0或1。这些化合物可作为
前列腺素类似物的前体,以及其制备过程。