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Natural quinones, often linked with cellular oxidation processes, exhibit pronounced biological activity. In particular, the structurally unique isothiazolonaphthoquinone aulosirazole, isolated from blue‐green alga, possesses selective antitumor cytotoxicity, although its mechanism of action is unknown. The first synthesis of aulosirazole uses a route centered upon a late‐stage regioselective Diels–Alder...
Im Repertoire an Reaktionen, das dem Organiker in der Totalsynthese zur Verfügung steht, gehört die Diels‐Alder‐Reaktion zu den wirksamsten und am besten verstandenen. Ihre Fähigkeit, komplexe Molekülstrukturen rasch durch die gleichzeitige Bildung von zwei Kohlenstoff‐Kohlenstoff‐Bindungen aufzubauen, ist nahezu unerreicht. Das spiegelt sich in der Vielzahl von Anwendungen der Reaktion wider, die...
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