Palladium-Catalyzed Alkylarylation of Acrylamides with Unactivated Alkyl Halides
作者:Hua Wang、Li−Na Guo、Xin-Hua Duan
DOI:10.1021/acs.joc.5b02433
日期:2016.2.5
An efficient palladium-catalyzed alkylarylation of acrylamides with unactivatedalkyl halides has been developed. This method is highlighted by its broad substrate scope and excellent functional group tolerance. In addition to alkyl halides, fluoroalkyl halides and benzyl bromides also participated well in this transformation. A detailed mechanistic investigation suggests that a radical pathway is
From Alkyl Halides to Ketones: Nickel‐Catalyzed Reductive Carbonylation Utilizing Ethyl Chloroformate as the Carbonyl Source
作者:Renyi Shi、Xile Hu
DOI:10.1002/anie.201903330
日期:2019.5.27
remains in high demand. Described here is a nickel‐catalyzed three‐component reductive carbonylation method for the synthesis of dialkyl ketones. A wide range of both symmetric and asymmetric dialkyl ketones can be accessed from alkyl halides and a safe CO source, ethyl chloroformate. The approach offers complementary substrate scope to existing carbonylation methods while avoiding the use of either toxic
Stereoselective Synthesis of Trisubstituted Alkenes through Sequential Iron-Catalyzed Reductive<i>anti</i>-Carbozincation of Terminal Alkynes and Base-Metal-Catalyzed Negishi Cross-Coupling
作者:Chi Wai Cheung、Xile Hu
DOI:10.1002/chem.201504049
日期:2015.12.7
stereoselective synthesis of trisubstituted alkenes is challenging. Here, we show that an iron‐catalyzed anti‐selective carbozincation of terminal alkynes can be combined with a base‐metal‐catalyzed cross‐coupling to prepare trisubstituted alkenes in a one‐pot reaction and with high regio‐ and stereocontrol. Cu‐, Ni‐, and Co‐based catalytic systems are developed for the coupling of sp‐, sp2‐, and sp3‐hybridized
Radical Cyanation of Alkyl
Iodides with Diethylphosphoryl Cyanide
作者:Sunggak Kim、Chang Cho、Jin Lee
DOI:10.1055/s-0028-1087385
日期:——
The β-elimination of an organophosphoryl group from an iminyl radical is observed for the first time. On the basis of this finding, radical cyanation of alkyl iodides is achieved by using diethylphosphoryl cyanide.