New methodology for conjugate additions of allylic ligands to. alpha.,. beta.-unsaturated ketones: synthetic and spectroscopic studies
BH Lipshutz, EL Ellsworth, SH Dimock…
文献索引:Lipshutz, Bruce H.; Ellsworth, Edmund L.; Dimock, Stuart H.; Smith, Robin A.J. Journal of the American Chemical Society, 1990 , vol. 112, # 11 p. 4404 - 4410
Abstract Michael additions of allylic ligands, including allyl, methallyl, crotyl, and prenyl systems, to a variety of a, &unsaturated ketones can be effected in synthetically useful yields with allylcopper reagents in the presence of trimethylchlorosilane. Low-temperature 13C NMR spectral studies suggest that the allylic ligands are o-bound to copper.