Thiosulfonic<i>S</i>-Esters; 6. Fluoride-Mediated α-Phenylsulfenylation of Cyclic Ketones and Esters via their Trimethylsilyl Enol Ethers
作者:Romualdo Caputo、Carla Ferreri、Giovanni Palumbo
DOI:10.1055/s-1989-27292
日期:——
Ketones and carboxylic acid esters are conveniently converted to their α-sulfenylated derivatives. This new procedure is likely to represent the first reliable one for regiospecific monosulfenylation of carbonyl compounds. It is based on the reaction of their trimethylsilyl enol ether derivatives with tetrabutylammonium fluoride in the presence of thiosulfonic S-esters, in anhydrous tetrahydrofuran, under mild conditions, at - 70°C for a few minutes.
酮和羧酸酯可方便地转化为它们的α-亚磺酰化衍生物。这一新方法可能代表了首个可靠的、针对羰基化合物进行区域选择性单亚磺酰化的方法。其基础是:在无水四氢呋喃中,在温和条件下,以-70°C温度持续几分钟,利用三甲基硅基烯醇醚衍生物与四丁基氟化铵在硫代磺酸S-酯存在下反应。