Gold-Catalyzed [4C+3C] Intramolecular Cycloaddition of Allenedienes: Synthetic Potential and Mechanistic Implications

Gold-Catalyzed [4C+3C] Intramolecular Cycloaddition of Allenedienes: Synthetic Potential and Mechanistic Implications
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DOI:
10.1002/chem.200900164
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发表时间:
2009-01-01
影响因子:
4.3
通讯作者:
Mascarenas, Jose L.
Mascarenas, Jose L.
中科院分区:
化学2区
文献类型:
--
作者:
Trillo, Beatriz;Lopez, Fernando;Mascarenas, Jose L.

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室温下高效:由 [(IPr)AuCl] 和 AgSbF6 原位生成的 Au 络合物可在室温下以特别高效且通用的方式促进丙二烯和二烯的 [4C+3C] 分子内环加成。对二甲基烯基前体的 DFT 研究与金属烯丙基阳离子中间体的形成和环加成一致,并指出 1,2-氢化物转变是关键的限速步骤。
Efficient at room temperature: The Au complex generated in situ from [(IPr)AuCl] and AgSbF6promotes the [4C+3C] intramolecular cycloaddition of allenes and dienes at room temperature, and in a particularly efficient and versatile manner. A DFT study on dimethylallenyl precursors agreed with the formation and cycloaddition of a metal–allyl cation intermediate, and points to the 1,2‐hydride shift as the key rate‐limiting step.