4.8 Article

Nickel-Catalyzed [4+2] Cycloaddition of Enones with Alkynes

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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 4, 页码 1350-+

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AMER CHEMICAL SOC
DOI: 10.1021/ja807952r

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  1. Ministry of Education, Culture, Sports, Science, and Technology, Japan
  2. NOVARTIS Foundation (Japan)
  3. Takeda Pharmaceutical Company, Japan

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A nickel-catalyzed [4 + 2] cycloaddition reaction has been developed where enones react with alkynes to afford polysubstituted pyrans. A mechanistic rationale is proposed, implying oxa-nickela cycle formation by oxidative cyclization of nickel to enone, followed by alkyne insertion.

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