Cyclic Polymers by the Ring-Closure Strategy: an Updated Review


The preparation of cyclic macromolecules has always represented a challenging task in polymer science mainly due to difficulties in connecting chain extremities together. Initiated with the pioneering works of Jacobson and Stockmayer, preparative pathways to cyclic polymers have been considerably improved within the last two decades thanks to the advent of both controlled polymerization mechanisms and efficient coupling reactions in organic chemistry. This review aims at providing a critical up-to-date overview and illustration of the considerable efforts that have been furnished in the past few years to improve the availability of macrocycles for industrial and academia investigations by means of the ring-closure approach. Particular attention is paid to the preparative methods to monocycles over more complex architectures, since the latter are usually derived from the first.

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