Preparation of a New Chiral Non-Racemic Sulfur-Containing Diselenide and Applications in Asymmetric Synthesis
作者:Marcello Tiecco、Lorenzo Testaferri、Claudio Santi、Cristina Tomassini、Francesca Marini、Luana Bagnoli、Andrea Temperini
DOI:10.1002/1521-3765(20020301)8:5<1118::aid-chem1118>3.0.co;2-2
日期:2002.3.1
The synthesis of the new chiral non-racemic sulfur-containing diselenide, di-2-methoxy-6-[(1S)-1-(methylthio)ethyl]phenyl diselenide, is described. When treated with ammonium persulfate this diselenide is transformed into the corresponding selenenyl sulfate, which acts as a strong electrophilic reagent and adds to alkenes, in the presence of methanol or water, to afford the products of selenomethoxylation
描述了新的手性非外消旋含硫二硒化物二-2-甲氧基-6-[(1S)-1-(甲硫基)乙基]苯基二硒化物的合成。当用过硫酸铵处理时,该二硒化物被转化为相应的硒烯基硫酸盐,其作为强亲电试剂,并在甲醇或水的存在下加到烯烃中,分别提供具有优异的非对映选择性的硒甲氧基化或硒代羟基化的产物。从包含内部亲核试剂的烯烃开始,不对称环官能化反应还导致良好的化学收率,完全的区域选择性和高的非对映选择性。这种含硫的二硒化物也可以催化量用于促进一锅亚硒基化-二硒基化过程,