Efficient ligand-free palladium catalyzed Mizoroki–Heck reaction allowed the formation of trisubstituted α-trifluoromethylacrylates. The reaction showed good chemical tolerance and furnished moderate to excellent yields of reaction. Silver salt additive proved to be essential for the reaction. The reaction has been then applied to the formation of 3-trifluoromethyl coumarins and analogues of therapeutic
Transition metal-catalyzed formation of CF3-substituted α,β-unsaturated alkene and the synthesis of α-trifluoromethyl substituted β-amino ester
作者:Wan Pang、Shifa Zhu、Huanfeng jiang、Shizheng Zhu
DOI:10.1016/j.tet.2006.09.041
日期:2006.12
A new transition metal-catalyzed formation of CF3-substituted α,β-unsaturated alkenes through the ylide intermediate from the reaction between methyl 3,3,3-trifluoro-2-diazopropionate 1 and aryl aldehydes has been developed. Further transformation of the alkene affords the α-trifluoromethyl substituted β-aminoester, a valuable intermediate in the synthesis of fluorine-containing amino acids with potential