Paveliev SA, Segida OO, Dvoretskiy A, Dzyunov MM, Fedorova UV, Terent'ev AO. Electrifying Phthalimide-
N-Oxyl (PINO) Radical Chemistry: Anodically Induced Dioxygenation of Vinyl Arenes with
N-Hydroxyphthalimide.
J Org Chem 2021;
86:18107-18116. [PMID:
34878276 DOI:
10.1021/acs.joc.1c02367]
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Abstract
An electrochemical process of free-radical difunctionalization of vinyl arenes with N-hydroxyphthalimide resulting in vicinal dioxyphthalimides was discovered. The reaction proceeds with the use of pyridinium perchlorate and pyridine as a supporting electrolyte and a base, respectively. The present approach involves the anodic generation of stabilized phthalimide-N-oxyl (PINO) radical, which adds to the carbon-carbon double bond of vinyl arenes and recombines with the subsequently formed benzylic radical. A wide range of dioxyphthalimides were obtained in yields up to 81%.
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