Visible‐Light‐Enabled Stereodivergent Synthesis of
<i>E</i>
‐ and
<i>Z</i>
‐Configured 1,4‐Dienes by Photoredox/Nickel Dual Catalysis
作者:Fan Song、Fang Wang、Lei Guo、Xiaoliang Feng、Yanyan Zhang、Lingling Chu
DOI:10.1002/anie.201909543
日期:2020.1.2
visible-light-induced photoredox/nickel dual catalysis. The mild reaction conditions allow good compatibility of both vinyl triflates and allylic carbonates. Notably, the stereoselectivity of this synergistic cross-electrophile coupling can be tuned by an appropriate photocatalyst with a suitable triplet-state energy, providing a practical and stereodivergent means to alkene synthesis. Preliminary mechanistic
通过可见光诱导的光氧化还原/镍双重催化已经实现了烯丙基碳酸酯和乙烯基三氟甲磺酸酯之间的立体发散的还原偶联反应,以提供E-和Z-构型的1,4-二烯。温和的反应条件使乙烯基三氟甲磺酸酯和烯丙基碳酸酯都具有良好的相容性。值得注意的是,可以通过具有合适的三线态能量的合适的光催化剂来调节这种协同的交亲电偶合的立体选择性,从而为烯烃的合成提供了一种实用且立体发散的方式。初步的机理研究为偶联步骤以及立体选择性步骤的控制提供了一些启示。