Palladium-Catalyzed Three-Component Selective Aminoallylation of Diazo Compounds
Pengcheng Ou, Lei Zhu, Yinghua Yu, Liyao Ma, Xueliang Huang
Abstract
We describe a Xantphos-containing dinuclear palladium complex-enabled geminal aminoallylation of diazocarbonyl compounds, which selectively provides a range of quaternary α-amino esters. Direct N-H insertion, allylic alkylation of amino nucleophiles, and diene formation were not observed under standard conditions. Mechanistic studies indicated that a relayed pathway via allylation of the N-H insertion product or [2,3]-sigmatropic rearrangement of an ylide intermediate was unlikely.
Topics & Concepts
ChemistryGeminalPalladiumDiazoXantphosNucleophileTsuji–Trost reactionCatalysisAllylic rearrangementMedicinal chemistryYlideAlkylationStereochemistryCombinatorial chemistryOrganic chemistryCyclopropane Reaction MechanismsCatalytic C–H Functionalization MethodsSynthesis and Catalytic Reactions