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.
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.
Copper-Catalyzed Intermolecular Cyanotrifluoromethylation of Alkenes
A novel and highly practical reaction for the copper-catalyzed intermolecular cyanotrifluoromethylation of alkenes is presented here. This methodology provides a general and straightforward way to synthesize a variety of useful CF3-containing nitriles, which can be used for further preparation of pharmaceutically and agrochemically important compounds in synthetic organic chemistry.
Enantioselective Copper-Catalyzed Intermolecular Cyanotrifluoromethylation of Alkenes via Radical Process
作者:Fei Wang、Dinghai Wang、Xiaolong Wan、Lianqian Wu、Pinhong Chen、Guosheng Liu
DOI:10.1021/jacs.6b10468
日期:2016.12.7
A novel enantioselective copper-catalyzedintermolecular cyanotrifluoromethylation of alkenes has been developed, in which a variety of CF3-containing alkylnitriles are furnished with excellent enantiomeric excess. Preliminary mechanistic studies revealed (1) the reaction was initiated by a SET process between activated Togni's CF3+ reagent and a Cu(I) catalyst; (2) the released CF3 radical readily