... Printed in Great Britain Perqamon Journals Ltd. Trimethylsilyl Chloride/'I'etramethylethylene diamine Facilitated Additions of Organocopper Reagents (RCu) to Enones Carl R. Johnson* and Thomas J. Marren Department of Chemistry, Wayne State University, Detroit, Michigan 48202 Summary: Alkylcoppers (RCu) add readily in a conjugate fashion to enones in the presence of TMSCl and TMEDA to give high yields of trimethylsilyl enol ethers. ...