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Indium-Catalyzed [2 + 2] Cycloaddition of Allylsilanes to Internal Alkynones

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journal contribution
posted on 04.12.2015, 00:00 by Kazuhiro Okamoto, Takuya Shimbayashi, Eisuke Tamura, Kouichi Ohe
We have developed an indium-catalyzed [2 + 2] cycloaddition of allylsilanes to alkynones leading to selective cyclobutenone formation. The resulting cyclobutenones were readily converted to the oxidized products by Tamao–Fleming oxidation or the ring-opened products by an electrocyclic reaction.

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