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The selective oxidation of a series of functionalized 8,8'-hydroxylated binaphthols to binaphtho-para- and binaphtho-ortho-quinones has been realized using either a Co-salen catalyst or ortho-iodoxybenzoic acid. A unique spirocyclic bis-spironaphthalenone was also obtained in good yield via a phenyliodonium diacetate promoted oxidative dearomatization.

Selective Oxidation of 8,8′-Hydroxylated Binaphthols to Bis-spironaphthalenones or Binaphtho-para- and Binaphtho-ortho-quinones