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Wang, Cui‐Tian; Liang, Peng‐Yu; Li, Ming; Wang, Bin; Wang, Yu‐Zhao; Li, Xue‐Song; Wei, Wan‐Xu; Gou, Xue‐Ya; Ding, Ya‐Nan; Zhang, Zhe; Li, Yu‐Ke; Liu, Xue‐Yuan; Liang, Yong‐Min
Angewandte Chemie International Edition, July 10, 2023, Volume: 62, Issue: 28Journal Article
The aryl‐to‐vinyl nickel 1,4‐migration (1,4‐Ni migration) reaction has been reported for the first time. The generated alkenyl Ni species undergo a reductive coupling reaction with unactivated brominated alkanes affording a series of trisubstituted olefins. This tandem reaction exhibits mild conditions, a broad substrate scope, high regioselectivity, and excellent Z/E stereoselectivity. A series of controlled experiments have shown that the critical 1,4‐Ni migration process is reversible. In addition, the alkenyl nickel intermediates obtained after migration are highly Z/E stereoselective and do not undergo Z/E isomerization. The obtained trace isomerization products are caused by the instability of the product. The 1,4‐nickel migration process from aryl to alkenyl groups is now reported for the first time. The alkenyl nickel intermediates generated by this highly stereoselective migration process can be coupled with brominated alkanes to form multisubstituted olefins. The current method provides a new and efficient approach for the synthesis of Z/E olefins with high stereoselectivity.
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