Gold‐Catalyzed Oxidative Cyclizations of <i>cis</i>‐3‐En‐1‐ynes To Form Cyclopentenone Derivatives

Abstract

Golden tendencies: The title reaction for synthesizing cyclopentenone derivatives utilizes a gold complex and 8-methylquinoline oxide as the catalyst system (see scheme; IPr=1,3-bis(diisopropylphenyl)imidazol-2-ylidene). Such products are not attainable using diazocarbonyl reagents, as the gold carbenoids tend to react with CH bonds.