Radical alkynyltrifluoromethylation of alkenes with actylenic triflones has been achieved. This radical chain reaction is initiated by a catalytic amount of an electron-donor–acceptor complex composed of Togni’s reagent and N-methylmorpholine. This transformation proceeds under exceptionally mild and operationally simple conditions. A variety of alkenes are compatible in this protocol including aliphatic
Visible‐Light‐Induced Vicinal Dichlorination of Alkenes through LMCT Excitation of CuCl
<sub>2</sub>
作者:Pengcheng Lian、Wenhao Long、Jingjing Li、Yonggao Zheng、Xiaobing Wan
DOI:10.1002/ange.202010801
日期:2020.12.21
AbstractThis work demonstrates photoredox vicinal dichlorination of alkenes, based on the homolysis of CuCl2 in response to irradiation with visible light. This catalysis proceeds via a ligand to metal charge transfer process and provides an exciting opportunity for the synthesis of 1,2‐dichloride compounds using an inexpensive, low‐molecular‐weight chlorine source. This new process exhibits a wide
Mn-Catalysed photoredox hydroxytrifluoromethylation of aliphatic alkenes using CF<sub>3</sub>SO<sub>2</sub>Na
作者:Wenhao Long、Pengcheng Lian、Jingjing Li、Xiaobing Wan
DOI:10.1039/d0ob01322f
日期:——
This work demonstrated the photoinduced hydroxytrifluoromethylation of aliphaticalkenes catalysed by Mn(acac)3. The synthesis uses an inexpensive catalyst under mild reaction conditions, and exhibits a wide substrate scope and excellent functional group tolerance.
Atom-Transfer Radical Addition to Unactivated Alkenes by using Heterogeneous Visible-Light Photocatalysis
作者:Liang-Liang Mao、Huan Cong
DOI:10.1002/cssc.201701382
日期:2017.11.23
photocatalyst titanium dioxide in the presence of a catalytic hypervalent iodine(III) reagent has been found as an effective method to initiate a broad range of atom-transfer radicaladdition reactions to unactivated alkenes under mild and heavy metal-free conditions.