Abstract
Diels Alder (DA) reaction is regarded as a quite useful strategy in organic and macromolecular syntheses. The reversibility of this reaction and the advent of self-repair technology, as well as other applications in controlled macromolecular architectures and crosslinking, have strongly boosted that research activity, that is still undergoing a huge interest for both academic and industrial research. DA reaction is a simple and scalable toolbox. Though it is well-established that the furan/maleimide is the most studied diene/dienophile couple, this perspective article reports strategies using other reversible systems with deeper features on other types of diene/dienophile pairs being either petrosourced (cyclopentadiene, anthracene) or bio-sourced (muconic and sorbic acids, myrcene and farnesene derivatives, eugenol, cardanol). That Perspective is composed of four sections. The first one briefly recalls the background on the DA reactions involving cyclodimerizations, dienes and dienophiles, parameters affecting the reaction while the second part deals with the Furan/Maleimide reaction. Third, petro-sourced and bio-sourced (or products becoming biosourced) involved in DA reactions are also listed and criticized. Finally, the authors' opinion is given on potential future of the crosslinking-decrosslinking reaction, especially regarding the process (e.g., key temperatures of decrosslinking) or possibly monocomponents. It presents both fundamental and applied research on DA reaction and their applications.