作者:Huan‐Ming Huang、Peter Bellotti、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.202011996
日期:2021.2
Carbonyl propargylation has been established as a valuable tool in the realm of carbon–carbon bond forming reactions. The 1,3‐enyne moiety has been recognized as an alternative pronucleophile in the above transformation through an ionic mechanism. Herein, we report for the first time, the radical carbonyl propargylation through dual chromium/photoredox catalysis. A library of valuable homopropargylic
Photoinduced Merging with Copper‐ or
<scp>Nickel‐Catalyzed</scp>
1,
<scp>4‐Cyanoalkylarylation</scp>
of 1,
<scp>3‐Enynes</scp>
to Access Multiple Functionalizatized Allenes in Batch and Continuous Flow
A three-component reaction of 1,3-enynes and cyclobutanone oxime esters in the presence of aryl boronic acids or organozinc reagents via the photoredox/copper or photoredox/nickel catalysis has been established. This redox-neutral 1,4-cyanoalkylarylation reaction has demonstrated mild condition, high catalytic reactivity and wide functional group compatibility, allowing access to a variety of functionalized
Synthesis of trifluoromethylated allenes via visible light-promoted bis(trifluoromethylation) of 1,3-enynes
作者:Yu-Rou Zhao、Yanchen Zhou、Mingyou Hu
DOI:10.1016/j.jfluchem.2023.110105
日期:2023.4
A visible light-promoted/copper-mediated 1,4-bis(trifluoromethylation) method of easily available 1,3-enynes to construct allenic Csp2−CF3 bonds has been described. The reaction proceeded under mild conditions, has broad substrate scope and good functional group tolerance. Photocatalyst is not required in this protocol, and O2 plays an important role in facilitating the trifluoromethyl group transfer
A nickel-catalyzed three-component tandem radicalcyclization reaction of aryl bromides with 1,3-enynes and aryl boric acids to construct γ-lactam-substituted allene derivatives has been described. This protocol provides lactam alkyl radicalsthrough the free radicalcyclization process, which can be effectively used to participate in the subsequent multicomponent coupling reaction so that 1,3-enynes