Sunlight-driven trifluoromethylation of olefinic substrates by photoredox catalysis: A green organic process
作者:Munetaka Akita、Takashi Koike
DOI:10.1016/j.crci.2015.01.013
日期:2015.7
types of catalytic photoredox processes following the reductive quenching cycle (RQC) and the oxidative quenching cycle (OQC), the discussion is focused on organic transformations based on OQC, in particular the trifluoromethylation of olefinic substrates with electrophilic trifluoromethylating reagents furnishing solvolytic addition products and substitution products. It is concluded that catalytic
Practical Photocatalytic Trifluoromethylation and Hydrotrifluoromethylation of Styrenes in Batch and Flow
作者:Natan J. W. Straathof、Sten E. Cramer、Volker Hessel、Timothy Noël
DOI:10.1002/anie.201608297
日期:2016.12.12
represent a challenging class of substrates for current radical trifluoromethylation and hydrotrifluoromethylation methods due to a myriad of potential side reactions. Herein, we describe the development of mild, selective and broadly applicable photocatalytic trifluoromethylation and hydrotrifluoromethylation protocols for these challenging substrates. The methods use fac‐Ir(ppy)3, visible light and
Efficient Trifluoromethylation of Activated and Non-Activated Alkenyl Halides by Using (Trifluoromethyl)trimethylsilane
作者:Andreas Hafner、Stefan Bräse
DOI:10.1002/adsc.201100528
日期:2011.11
An efficient method for the trifluoromethylation of halogenated double bonds by using in situ generated “trifluoromethyl copper” is described. Herein, the most common trifluoromethyl source, (trifluoromethyl)trimethylsilane, was converted selectively into “trifluoromethyl copper” by using copper iodide as copper source and potassium fluoride as promoter. In 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone
Photochemical Generation of Highly Destabilized Vinyl Cations: The Effects of α- and β-Trifluoromethyl versus α- and β-Methyl Substituents
作者:Kaj van Alem、Geerte Belder、Gerrit Lodder、Han Zuilhof
DOI:10.1021/jo0487956
日期:2005.1.1
primarily generated α-CH3 and α-CF3 vinylcations, or from the α-CH3 vinylcation formed from the β-CH3 vinylcationvia a 1,2-phenyl shift. The β-CF3 vinylcation reacts with methanol yielding nucleophilic substitution products, no migration of the phenyl ring producing the α-CF3 vinylcation occurs. The α-CF3 vinylcation, which is the most destabilized vinylcation generated thus far, gives a 1,2-fluorine
A simple synthesis of 3,3,3-trifluoropropenyl compounds by means of the TBAF-mediated Horner reaction is described. The reagent, 2,2,2-trifluoroethyldiphenylphosphine oxide, was readily prepared either by Arbuzov reaction of ethyl diphenylphosphinite with 2,2,2-trifluoroethyl iodide or by treating chlorodiphenylphosphine with trifluoroacetic acid and water. Treatment of the phosphine oxide with aromatic