REGIO- AND STEREOSELECTIVE PREPARATION OF SILYL ENOL ETHERS BY ALKYLIDENATION OF SILYL ESTERS
Treatment of trimethylsilyl esters with a reagent for alkylidenation of carbonyl groups derived from 1,1-dibromoalkane, zinc, TiCl4, and TMEDA in THF gives Z-trimethylsilyl enol ethers in a regio- and stereoselective manner.