Merging Photoredox PCET with Ni-Catalyzed Cross-Coupling: Cascade Amidoarylation of Unactivated Olefins
作者:Shuai Zheng、Álvaro Gutiérrez-Bonet、Gary A. Molander
DOI:10.1016/j.chempr.2018.11.014
日期:2019.2
integration of amidylradicals with cross-coupling chemistry opens new avenues for reaction design. However, the lack of efficient methods for the generation of such radical species has prevented many such transformations from being brought to fruition. Herein, the amidoarylation of unactivated olefins by a cascade processfrom non-functionalized amides is reported by merging, for the first time, photoredox
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
作者:Shuai Zheng、Shuo-Qing Zhang、Borna Saeednia、Jiawang Zhou、Jessica M. Anna、Xin Hong、Gary A. Molander
DOI:10.1039/d0sc01459a
日期:——
The selective 1,2-aminoacylation of olefins provides opportunities for the rapid construction of nitrogen-containing molecules. However, the lack of CO-free acylation reactions has limited their application. By using photoredox proton-coupled electron transfer (PCET)/Ni dual-catalysis, a highly regio- and diastereoselective amidoacylation of unactivated olefins has been developed. Various acyl electrophiles
Synthesis of cyano-substituted γ-lactams through a copper-catalyzed cascade cyclization/cyanation reaction
作者:Wen Liu、Liang Wang、Haiping Mu、Qian Zhang、Zeguo Fang、Dong Li
DOI:10.1039/d2ob02086f
日期:——
A convenient copper-catalyzedcascade cyclization/cyanation reaction for the construction of cyano-containing γ-lactams was developed. The protocol employed TMSCN as the cyano source and proceeded in water under simple conditions. Mechanistic studies indicated this reaction involved an amidyl radical initiated cascade 5-exo-trig cyclization/cyanation process. It is capable of generating a series of
Copper-Catalyzed Hydroxyperfluoroalkylation of Unactivated Alkenes: Access to β-Perfluoroalkyl Alcohols
作者:Luqing Tang、Cancan Feng、Fan Yang、Yangjie Wu
DOI:10.1021/acs.orglett.3c00651
日期:2023.4.28
An expeditious copper-catalyzed three-component hydroxyperfluoroalkylation of unactivated alkenes starting from commercially available perfluoroalkyliodides and an O2 molecule from air as the oxygen source was developed. The Cu/B2pin2 catalytic system offered a novel pattern for the generation of perfluoroalkyl radicals and overcame the previous limitations in the hydroxyperfluoroalkylation of unactivated
以市售的全氟烷基碘和来自空气的 O 2分子作为氧源,开发了一种快速的铜催化的未活化烯烃的三组分羟基全氟烷基化反应。Cu/B 2 pin 2催化体系为全氟烷基自由基的产生提供了一种新的模式,并克服了先前在未活化烯烃的羟基全氟烷基化中的局限性。该催化方案具有高区域选择性和广泛的底物范围,可以方便地获得有价值的 β-全氟烷基醇。18 O标记实验表明,OH基团的氧原子来源于空气中的O 2。