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
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
The Boekelheide rearrangement is often employed for the oxy-functionalization of alkylgroups in the 2-position of pyridines, yet the corresponding alkylation reaction has so far not been realized since 1954. N-Alkenoxypyridinium functionalization has been widely applied to synthesize various carbonyl compounds by only using the carbonyl unit. Herein, we describe a simple yet efficient alkylation of
Sulfonamide tethered 1,4-disubstituted 1,2,3-triazoles: Synthesis and antibacterial evaluation
作者:Jyoti Yadav、C. P. Kaushik
DOI:10.1080/00397911.2024.2320842
日期:2024.4.2
A series of twenty one sulfonamide tethered 1,4-disubstituted 1,2,3-triazoles was synthesized in good yields through a facile expeditious click synthetic protocol involving Cu(I) mediated cyclizati...