Heteroannulation of bicyclobutane derivatives<i>via</i>Au-catalyzed hydration to enol ethers and intramolecular cyclization giving spirocyclobutanes

  • Masaharu Takatsuki
    Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka, Suita-shi, Osaka 565-0871, Japan
  • Hiroshi Aoyama
    Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka, Suita-shi, Osaka 565-0871, Japan
  • Kenichi Murai
    Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka, Suita-shi, Osaka 565-0871, Japan
  • Mitsuhiro Arisawa
    Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka, Suita-shi, Osaka 565-0871, Japan
  • Makoto Sako
    Graduate School of Pharmaceutical Sciences, Osaka University, Yamadaoka, Suita-shi, Osaka 565-0871, Japan

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<jats:p>A heteroannulations of bicyclobutane derivatives is demonstrated to afford spirocyclobutanes with cyclic acetal groups<jats:italic>via</jats:italic>the Au-catalyzed hydration and subsequent intramolecular cyclization.</jats:p>

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