Enantioselective conjugate addition, part V. Synthesis and testing of scalemic tetraamines as chiral cuprate ligands.
作者:Nicole M. Swingle、K.Vasavi Reddy、Bryant E. Rossiter
DOI:10.1016/s0040-4020(01)89378-9
日期:1994.4
Reported herein is the enantioselective conjugate addition of n-butyl to 2-cyclopentenone, 2-cyclohexenone, 2-cycloheptenone and 2-cyclooctenone using scalemic amidocuprates derived from copper(I) iodide, n-butyllithium and a homologous series of 5 scalemic tetraamines referred to as DIMMAP-2 through -6. Cuprates derived from DIMAPP-4 manifest the highest enantioselectivities (up to 78%) and the same