Substrate Control in the Asymmetric Aminohydroxylation of Monosubstituted Alkenes: The Enantioselective Synthesis of GABOB and Homoserine Derivatives
作者:Malcolm D. McLeod、Michael Harding、Jennifer A. Bodkin、Craig A. Hutton
DOI:10.1055/s-2005-918939
日期:——
group in the asymmetric aminohydroxylation reaction of but-3-en-1-ol derivatives. Either regioisomeric product can he obtained with useful levels of eoantioselectivity, allowing for the short enantioselective synthesis of GABOB and homoserine derivatives.
Dual Photoredox and Gold Catalysis: Intermolecular Multicomponent Oxyarylation of Alkenes
作者:Matthew N. Hopkinson、Basudev Sahoo、Frank Glorius
DOI:10.1002/adsc.201400580
日期:2014.9.15
developed using a dual gold and photoredoxcatalytic system. Inexpensive organic dyes could be employed as the photocatalyst using aryldiazonium salts, while the combination of gold and iridium catalysts allowed for diaryliodonium compounds to be employed as the source of the arene coupling partner. In both cases, α‐arylated ether products were generated under remarkably mild conditions using readily accessible
作者:Chetan C. Chintawar、Amit K. Yadav、Nitin T. Patil
DOI:10.1002/anie.202002141
日期:2020.7.13
Herein, we disclose the gold‐catalyzed 1,2‐diarylation of alkenes through the interplay of ligand‐enabled AuI/AuIII catalysis with the idiosyncratic π‐activation mode of gold complexes. Unlike the classical migratory‐insertion‐based approach to 1,2‐diarylation, the present approach not only circumvents the formation of direct Ar−Ar′ coupling and Heck‐type side products but more intriguingly demonstrates
本文中,我们通过配体使能的Au I / Au III催化与金配合物的特质π活化模式的相互作用揭示了金的烯烃1,2-二芳基化反应。与经典的基于迁移插入的方法进行1,2-二芳基化不同,本方法不仅规避了直接Ar-Ar'偶联和Heck型副产物的形成,而且更有趣地证明了其反应性和选择性与先前已知的互补金属催化(Pd,Ni或Cu)。对机理进行详细研究的结果表明,由于芳基烯烃具有非清白的性质,芳基碘化物向Au I络合物的氧化加成是限速步骤。
Hydrophosphonodifluoromethylation of Alkenes via Thiyl-Radical/Photoredox Catalysis
作者:Wenhao Huang、Jingzhi Chen、Daocheng Hong、Wenxin Chen、Xu Cheng、Yuxi Tian、Guigen Li
DOI:10.1021/acs.joc.7b02354
日期:2018.1.19
Visible-light-induced catalytic hydrophosphonodifluoromethylation of mono- and disubstituted alkenes using bromodifluoromethanephosphonate with a Hantzsch ester as the terminal reductant is reported. The combination of thiyl-radical catalysis with photoredoxcatalysis is important for achieving good chemoselectivity and high yields.
Iron-Catalyzed 1,2-Addition of Perfluoroalkyl Iodides to Alkynes and Alkenes
作者:Tao Xu、Chi Wai Cheung、Xile Hu
DOI:10.1002/anie.201402511
日期:2014.5.5
Iron catalysis has been developed for the intermolecular 1,2‐addition of perfluoroalkyliodides to alkynes and alkenes. The catalysis has a wide substrate scope and high functional‐group tolerance. A variety of perfluoroalkyliodides including CF3I can be employed. The resulting perfluoroalkylated alkyl and alkenyl iodides can be further functionalized by cross‐coupling reactions. This methodology