Highly Stereoselective Oxazaborolidinium Ion Catalyzed Synthesis of (<i>Z</i>)-Silyl Enol Ethers from Alkyl Aryl Ketones and Trimethylsilyldiazomethane
作者:Byung Chul Kang、Su Yong Shim、Do Hyun Ryu
DOI:10.1021/ol500174q
日期:2014.4.18
Highly stereoselective (Z)-silyl enol ethers were prepared fromalkylarylketones and trimethylsilyldiazomethane (TMSD) using an oxazaborolidinium ion catalyst. In addition, ring-expanded silyl enol ethers were successfully constructed from cyclic ketones. Their synthetic utilities were shown by sequential Mukaiyama aldol and [2 + 2]-cycloaddition reactions.
Fluorination of Ketones Using Iodotoluene Difluoride
作者:Shoji Hara、Saeko Sato、Masanori Yoshida
DOI:10.1055/s-2005-872105
日期:——
Fluorination of ketones was achieved by the reaction of silyl enol ethers with iodotoluene difluoride in the presence of BF 3 .OEt 2 and a Et 3 N.HF complex.