Inside Back Cover: Bispericyclic Diels–Alder Dimerization of ortho‐Quinols in Natural Product (Bio)Synthesis: Bioinspired Chemical 6‐Step Synthesis of (+)‐Maytenone (Angew. Chem. Int. Ed. 27/2021).

Under high pressure, this transition state leads to the product, the natural (+)-maytenone, which was first isolated from the plant I Maytenus dispermus i , here appearing in the background image. Asymmetric synthesis, cycloaddition, hypervalent compounds, total synthesis, transition states Keywords: asymmetric synthesis; cycloaddition; hypervalent compounds; total synthesis; transition states EN asymmetric synthesis cycloaddition hypervalent compounds total synthesis transition states 15111 15111 1 06/23/21 20210625 NES 210625 B From the teaching class b with the bispericyclic Diels-Alder reaction of I ortho i -quinols drawn on the chalk board to the laboratory with the (+)-ferruginol substrate and a chiral bisiodyl reagent in the flask: The single I ortho i -quinol diastereomer thus produced combines in pairs to reach a I C i SB 2 sb -symmetric transition state in which [4+2] and [2+4] processes are equivalent, as described by Laurent Pouységu, Stéphane Quideau, and co-workers in their Research Article on page 14967. [Extracted from the article]