Preparation of macrocyclic ether–esters, thioether–esters, and ether–thiolesters

A series of macrocyclic ether–esters, thioether–esters, and ether–thiolesters [(1)–(10)] have been prepared by treating various oligo-ethylene glycols and sulphur-containing oligo-ethylene glycols with malonyl, succinyl, and glutaryl chlorides.