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。