Organocatalytic “Difficult” Michael Reaction of Ketones with Nitrodienes Utilizing a Primary Amine-Thiourea Based on Di-tert-butyl Aspartate
作者:Michail Tsakos、Christoforos G. Kokotos
DOI:10.1002/ejoc.201101402
日期:2012.1
The primaryamine–thioureabased on di-tert-butyl (S)-aspartate and (1R,2R)-1,2-diphenylethylene-1,2-diamine has been successfully employed in the “difficult” Michaelreaction between aromatic ketones or acetone with nitrodienes. The high stability and reactivity of the catalyst led to improved reaction conditions. Thus, the desired products were obtained in high to excellent yields (up to 100 %) and