Scholarlink

<p>The efficient construction of molecular complexity from simple building blocks is a significant goal in catalysis, and the controlled ring-opening functionalization of strained carbocycles provides a powerful strategy to achieve it. However, selective catalytic strategies for ring-opening difunctionalization of methylenecyclobutanes (MCBs) remain elusive. Here, we report a nickel-catalyzed method that enables the 1,4-dicarbofunctionalization and 1,4-hydrocarbofunctionalization of MCBs via selective C–C bond cleavage. This protocol exploits the strain energy and dual reactivity of MCBs to deliver nonadjacent C(sp<sup>3</sup>)/C(sp<sup>2</sup>) frameworks in good to excellent yields under mild conditions. A broad substrate scope, scalability to the gram scale, and versatile downstream transformations demonstrate the synthetic utility of this approach. Mechanistic studies, including control, isotope-labeling experiments, and DFT calculations, reveal a distinct cooperative pathway involving strain-driven β-carbon elimination, offering new opportunities for catalyst-controlled activation of MCBs.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Nickel-catalyzed ring-opening difunctionalization of methylenecyclobutanes via strain-release-enabled C-C activation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月6日

查看全文
  • Tingting Wang,
  • Haina Liu,
  • Meihong Luo,
  • Wen-Wen Zhao,
  • Chao Ma,
  • Mingshuai Zhang,
  • Jian-Biao Liu,
  • Hongyu Wang

摘要

The efficient construction of molecular complexity from simple building blocks is a significant goal in catalysis, and the controlled ring-opening functionalization of strained carbocycles provides a powerful strategy to achieve it. However, selective catalytic strategies for ring-opening difunctionalization of methylenecyclobutanes (MCBs) remain elusive. Here, we report a nickel-catalyzed method that enables the 1,4-dicarbofunctionalization and 1,4-hydrocarbofunctionalization of MCBs via selective C–C bond cleavage. This protocol exploits the strain energy and dual reactivity of MCBs to deliver nonadjacent C(sp3)/C(sp2) frameworks in good to excellent yields under mild conditions. A broad substrate scope, scalability to the gram scale, and versatile downstream transformations demonstrate the synthetic utility of this approach. Mechanistic studies, including control, isotope-labeling experiments, and DFT calculations, reveal a distinct cooperative pathway involving strain-driven β-carbon elimination, offering new opportunities for catalyst-controlled activation of MCBs.