An efficient Cu-catalyzed stereoselective trifluoroethylation through the decarboxylative cross-coupling of cinnamic acid derivatives with CF3CH2I is described. The ready availability of the starting materials, the high level of functional group tolerance, and excellent E selectivity make this protocol a safe and operationally convenient strategy for the efficient synthesis of trifluoroethyl derivatives
Photocatalytic Synthesis of Allylic Trifluoromethyl Substituted Styrene Derivatives in Batch and Flow
作者:Lukas M. Kreis、Simon Krautwald、Nicole Pfeiffer、Rainer E. Martin、Erick M. Carreira
DOI:10.1021/ol400410m
日期:2013.4.5
A cobalt-catalyzed photochemical synthesis of allylic trifluoromethanes from styrenederivatives using 2,2,2-trifluoroethyl iodide is described. The method complements existing approaches, providing an alternative bond construction strategy to access these compounds. The process may be conducted in continuous mode in a novel photochemical flow reactor, resulting in a notable productivity increase.