Catalytic 1,4-rhodium(III) migration enables 1,3-enynes to function as one-carbon oxidative annulation partners in C-H functionalizations.

Catalytic 1,4-rhodium(III) migration enables 1,3-enynes to function as one-carbon oxidative annulation partners in C-H functionalizations.
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DOI:
10.1002/anie.201406072
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发表时间:
2014-09-08
影响因子:
16.6
通讯作者:
Lam, Hon Wai
Lam, Hon Wai
中科院分区:
化学1区
文献类型:
--
作者:
Burns, David J.;Lam, Hon Wai

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在各种铑催化的氧化环中,含有烯丙基顺式氢的1,3-炔被证明是单碳伙伴,而不是双碳伙伴。这些意想不到的转化机制被认为是通过双碳氢活化发生的,涉及到一个迄今罕见的RhIII物种的1,4迁移的例子。这种现象在各种底物中普遍存在,并提供了各种各样的杂环产物。
1,3-Enynes containing allylic hydrogens cis to the alkyne are shown to act as one-carbon partners, rather than two-carbon partners, in various rhodium-catalyzed oxidative annulations. The mechanism of these unexpected transformations is proposed to occur through double C–H activation, involving a hitherto rare example of the 1,4-migration of a RhIII species. This phenomenon is general across a variety of substrates, and provides a diverse range of heterocyclic products.
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