Palladium-Catalyzed Three-Component Selective Aminoallylation of Diazo Compounds

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