Iodine(III)-Mediated Generation of Nitrogen-Tethered Orthoquinol Acetates for the Construction of Oxygenated Indole, Quinoline, and Phenanthridine Alkaloid Motifs
Functionalized indole and quinoline derivatives are conveniently prepared from nitrogen-tethered 2-methoxyphenols via phenyliodine(III) diacetate mediated oxidative acetoxylation, followed by a fluoride- or base-induced intramolecular nucleophilic addition reaction. This regioselective Michael-type addition step is further discussed in view of the rearrangement of orthoquinol acetate intermediates