11. An intramolecular Diels Alder reaction is carried out to form the macrocyclic ring. 12. Cycloalkanes can be formed in a Diels Alder reaction followed by a catalytic hydrogenation. 13. The endo product is generally favored, as in the isoelectronic Diels Alder reaction . 14. Himbacine has been synthesized using a Diels-Alder reaction as a key step. 15. It can be prepared by the Diels Alder reaction of dimethyl maleate and cyclopentadiene. 16. Tandem DKR-intramolecular Diels-Alder reaction . 17. Porphyrin trimer catalyst developed by Jeremy Sanders for exo selective Diels-Alder reactions . 18. This photoredox-catalyzed Diels Alder reaction allows cycloaddition between two electronically mismatched substrates. 19. In the first step the triazine reacts with the fullerene in a Diels-Alder reaction . 20. Diels-Alder reactions can lead to formation of a variety of structural isomers and stereoisomers.
