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A convergent approach based on Diels–Alder reactions between polycyclic dienes and benzoquinones has emerged as a powerful tool for the construction of helicenequinones and bisquinones. Chemical resolution and asymmetric Diels–Alder reactions with sulfinyl quinones provide direct access to enantiopure derivatives. Biaryl or ferrocenyl dienes can be resolved leading to helicenequinones having additional axial or planar chirality.
A review, with 37 references, highlighting the asymmetric synthesis of helicenequinones and -bisquinones from a convergent approach based on Diels–Alder reactions between polycyclic dienes and benzoquinones.
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Organic & Biomolecular Chemistry
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