Palladium-Catalyzed Aminocarbonylation of Allylic Alcohols
作者:Haoquan Li、Helfried Neumann、Matthias Beller
DOI:10.1002/chem.201601260
日期:2016.7.11
A benign and efficient palladium‐catalyzed aminocarbonylation reaction of allylic alcohols is presented. The generality of this novel process is demonstrated by the synthesis of β,γ‐unsaturated amides including aliphatic, cinnamyl, and terpene derivatives. The choice of ligand is crucial for optimal carbonylation processes: Whereas in most cases the combination of PdCl2 with Xantphos (L6) gave best
A catalytic base-controlled regiodivergent and chemoselective nucleophilic hydrofunctionalization of both terminal and internal β,γ-unsaturated amides was reported for the first time.
Manganese‐Catalyzed Hydroarylation of Unactivated Alkenes
作者:Ting Liu、Yunhui Yang、Congyang Wang
DOI:10.1002/anie.202003830
日期:2020.8.17
Transition‐metal‐catalyzed hydroarylation of unactivated alkenes with strategic use of remote coordinating functional groups has received significant attention recently to address the issues of both low reactivity and poor selectivity. The bidentate 8‐aminoquinoline amide group is the most successfully adopted in unactivated alkenes for Pd and Ni catalysis. We describe the first manganese‐catalyzed hydroarylation
An efficient Ni-catalyzed hydrodifluoroalkylation of unactivated alkenes with bromodifluoroacetate by using PhSiH3 as hydride source was developed. The transformation affords aliphatic difluorides with anti-Markovnikov regioselectivity. A wide range of highly remote alkenes, simple alkenes, drug molecules, commercially available CF2 precursors, and even nonfluorinated substrates are competent in this
The regioselective hydroboration of aliphatic internal alkenes remains a great challenge. Reported herein is an iridium‐catalyzed hydroboration of aliphatic internal alkenes, providing distal‐borylated products in good to excellent yields with high regioselectivity (up to 99:1). We also demonstrate that the C−B bond of the distal‐borylated product can be readily converted into other functional groups
脂族内部烯烃的区域选择性氢硼化仍然是一个巨大的挑战。本文报道的是铱催化的脂肪族内部烯烃的硼氢化,可提供高至选择性的高至高产率(高达99:1)的远端硼化产物。我们还证明了远端硼化产品的C-B键可以很容易地转化为其他官能团。DFT计算表明反应通过意想不到的Ir III / Ir V循环进行。