Synthesis of thiosaccharides employing the Pummerer rearrangement of tetrahydrothiopyran oxides
作者:Junji Fujita、Hiroko Matsuda、Kazunori Yamamoto、Yasuharu Morii、Masaru Hashimoto、Toshikatsu Okuno、Kimiko Hashimoto
DOI:10.1016/j.tet.2004.06.006
日期:2004.8
The Pummerer rearrangement of 1-deoxy-5-thioglucopyranose derivatives carrying acetonides at the C3,4-positions proceeded regioselectively at the C1 position by treating with TFAA in the presence of pyridine. Studies employing deuterium-labelled derivatives revealed that the reaction was induced by E2 1,2-elimination of trifluoroacetic acid of the trifluoroacetoxy sulfonium intermediate. This methodology
通过在吡啶存在下用TFAA处理,在C1,4-位带有丙酮化物的1-脱氧-5-硫代吡喃葡萄糖衍生物的Pummerer重排在C1位置区域选择性地进行。使用氘标记衍生物的研究表明,该反应是通过E2 1,2-消除三氟乙酰氧基sulf中间体的三氟乙酸诱导的。该方法学应用于由5-硫代吡喃葡萄糖苷单元组成的异麦芽三糖衍生物的合成。