Selective Oxidation of 8,8′-Hydroxylated Binaphthols to Bis-spironaphthalenones or Binaphtho-para- and Binaphtho-ortho-quinones
摘要:
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.
概述了手性蒽醌二聚体的第一次不对称合成的发展,从而导致了 ( S )-双茚二醇的第一次全合成。不是仿生二聚化逆合成断开,而是在形成轴向手性联萘骨架后生成蒽环系统。这种合成策略使几种类似物的合成成为可能。合成的主要功能包括的对映选择性耦合受阻含有替代2-萘酚迫到的C-C键形成的部位,8,8'-羟基化binaphthols到binaphtho-区域选择性氧化段-quinones,和串联区域选择性Diels-Alder/芳构化反应。