Thermal ene reactions of methyl 3,3,3-trifluoro-2-methanesulfonyliminopropionate and methyl 2-benzenesulfonylimino-3,3,3-trifluoropropionate with terminal alkenes afford derivatives of gamma,delta -unsaturated alpha -amino alpha -trifluoromethylcarboxylic acids in one step.
Novel Synthesis of Cyclic <i>α</i>-Amino Acid Esters via Ene Reaction and Ruthenium-catalyzed Ring Rearrangement
作者:Sergey N. Osipov、Natalia M. Kobelíkova、Gregory T. Shchetnikov、Alexey F. Kolomiets、Christian Bruneau、Pierre H. Dixneuf
DOI:10.1055/s-2001-13362
日期:——
New fluorinated unsaturated cyclic α-amino acid esters were obtained by ene reaction of methylenecycloalkanes with electrophilic imines (CF3)(MeO2C)C=N-PG, followed by ruthenium-catalyzed ring rearrangement involving mixed ROM-RCM metathesis.