Efficient Assembly of Molecular Complexity Enabled by Palladium‐Catalyzed Heck Coupling/C(
<i>sp</i>
<sup>2</sup>
)−H Activation/ C(
<i>sp</i>
<sup>3</sup>
)−H Activation Cascade
作者:Chen He、Wen‐Yong Han、Bao‐Dong Cui、Nan‐Wei Wan、Yong‐Zheng Chen
DOI:10.1002/adsc.202000488
日期:2020.9.8
palladium‐catalyzed [2+2+1] annulation among 3‐iodochromones, benzyl bromides, and norbornene has been developed. This annulation consists of a domino sequence involving Heck coupling/C(sp2)−H activation/C(sp3)−H activation, affording a variety of complex chromone derivatives bearing five contiguous tertiary carbon centers in up to 94% yield and 99:1 dr. Interestingly, the diastereoselectivity could be
在3-碘代色酮,苄基溴和降冰片烯中,钯催化了[2 + 2 + 1]环化反应。该环化过程由涉及Heck耦合/ C(sp 2)-H激活/ C(sp 3)-H激活的多米诺序列组成,提供了带有五个连续叔碳中心的多种复杂色酮衍生物,产率高达94%,99 :1博士 有趣的是,可以通过微调溶剂来改变非对映选择性,其中分别使用均三甲苯/ CH 3 CN和均三甲苯获得内异构体和外异构体。