Asymmetric total synthesis of (+)-xestoquinone and (+)-adociaquinones A and B

The asymmetric total synthesis of (+)-xestoquinone and (+)-adociaquinones A and B was achieved in 6-7 steps using an easily accessiblemeso-cyclohexadienone derivative. The [6,6]-bicyclic decalin B-C ring and the all-carbon quaternary stereocenter at C-6 were preparedviaa desymmetric intramolecular Michael reaction with up to 97% ee. The naphthalene diol D-E ring was constructed through a sequence of Ti(Oi-Pr)₄-promoted photoenolization/Diels-Alder, dehydration, and aromatization reactions. This asymmetric strategy provides a scalable route to prepare target molecules and their derivatives for further biological studies.