Control freaks: Chiral amine catalysts prove to be highly proficient mediators in the asymmetric, polyconjugate addition of C-, N-, and S-based nucleophiles to acyclic dienals and cyclic dienones. For high 1,6-selectivities, the stereo spatial matching of the molecular orbitals and ionic charges of the reacting species are key. But can we widen the scope and how far can we go with remote, iminium-stereocontrol?
- asymmetric catalysis
- Michael addition