Efficient Synthesis of Functionalized β‐Keto Esters and β‐Diketones through Regioselective Hydration of Alkynyl Esters and Alkynyl Ketones by Use of a Cationic NHC–AuI Catalyst

Abstract

Regioselective hydration of α‐alkynyl esters and ketones by using a cationic NHC–AuI catalyst results in β‐keto esters and β‐diketones, respectively. Controlled release of water in acetone by aldol self‐condensation under the reaction conditions makes acetone as better solvent than 1,4‐dioxane/water for the hydration of α‐alkynyl esters having sensitive ester moieties.