Copper-Mediated Cyanotrifluoromethylation of Styrenes Using the Togni Reagent
摘要:
Styrenes with an electron-deficient double bond undergo cyanotrifluoromethylation with a trifluoromethylated hypervalent iodine reagent in the presence of CuCN. The reaction proceeds under mild conditions in the presence of bulky phosphines or B(2)pin(2) additives. The process is highly regioselective and involves the consecutive formation of two C-C bonds in a single addition reaction. In the presence of a p-methoxy substituent in the styrene, oxytrifluoromethylation occurs instead of the cyanotrifluoromethylation.
Copper-catalyzed intermolecular cyanotrifluoromethylation of alkenes: Convenient synthesis of CF3-containing alkyl nitriles
作者:Zhaoli Liang、Fei Wang、Pinhong Chen、Guosheng Liu
DOI:10.1016/j.jfluchem.2014.04.004
日期:2014.11
A copper-catalyzedintermolecular cyanotrifluoromethylation of alkenes has been developed, in which the less reactive Togni reagent 2 was used as a CF3 source and TMSCN was employed as a cyano source. Both activated and unactivated alkenes were suitable for this transformation to give CF3-containing organonitriles under mild conditions.
A Readily Available Trifluoromethylation Reagent and Its Difunctionalization of Alkenes
作者:Min Zhang、Jin-Hong Lin、Ji-Chang Xiao
DOI:10.1021/acs.orglett.1c02146
日期:2021.8.6
Trifluoromethyl substitution is notably popular in pharmaceuticals and agrochemicals; however, trifluoromethylated compounds normally rely on the use of cost-prohibitive or gaseous trifluoromethylating reagents, which diminishes the general applicability of these methods. Herein an efficient trifluoromethylationreagent trifluoromethylsulfonyl–pyridinium salt (TFSP) was reported, which can be readily
Copper-Mediated Cyanotrifluoromethylation of Styrenes Using the Togni Reagent
作者:Nadia O. Ilchenko、Pär G. Janson、Kálmán J. Szabó
DOI:10.1021/jo401831t
日期:2013.11.1
Styrenes with an electron-deficient double bond undergo cyanotrifluoromethylation with a trifluoromethylated hypervalent iodine reagent in the presence of CuCN. The reaction proceeds under mild conditions in the presence of bulky phosphines or B(2)pin(2) additives. The process is highly regioselective and involves the consecutive formation of two C-C bonds in a single addition reaction. In the presence of a p-methoxy substituent in the styrene, oxytrifluoromethylation occurs instead of the cyanotrifluoromethylation.