A new method for the synthesis of cyclic oligo-and poly-esters is described which affords readily isolated products that have a cyclic content of up to 74%; the method promises to be useful for the synthesis of topologically novel materials.In recent years there has been an increasing interest in various molecules, including macromolecules, with novel topologies: for example , dendritic polymers' and polyrotaxanes.2 Cyclic oligomers are one type that has been known for many years because most step-growth polymerisations produce a small cyclic fraction, typically <5% of the total product.3 However,
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.