Abstract
A novel Rh2(OAc)4-catalyzed three-component reaction of diazoacetates, anilines, and activated ketones via ammonium ylide trapping processes is reported. The reaction of isatins afforded α-amino-β-hydroxy esters bearing the 3-substituted 3-hydroxyindolin-2-one moiety with vicinal quaternary carbon centers in one step with high chemo- and diastereoselectivity. Extension of the reaction to acyclic α-keto esters afforded 2-hydroxy-2-alkyl-3-aryl-3-(phenylamino) succinates in moderate yield and diastereoselectivity.
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