Precursors for prostaglandin analogue and process for preparing the same
申请人:Sagami Chemical Research Center
公开号:US04169199A1
公开(公告)日:1979-09-25
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.