Stereospecific Reductive Desulfinylation of 1-Aryl-2-(methylsulfinyl)-2-(methylthio)ethenes with Grignard Reagents
作者:Katsuyuki Ogura、Kazutaka Arai、Gen-ichi Tsuchihashi
DOI:10.1246/bcsj.55.3669
日期:1982.11
(E)-1-Aryl-2-(methylsulfinyl)-2-(methylthio)ethene, obtained by the Knoevenagel-type condensation of methyl (methylthio) methyl sulfoxide with the corresponding aromatic aldehyde, was found to react with ethylmagnesium chloride to give (Z)-1-aryl-2-(methylthio)ethene predominantly. Since the reaction of (Z)-1-(methylsulfinyl)-1-(methylthio)-2-phenylethene afforded (E)-1-(methylthio)-2-phenylethene
(E)-1-Aryl-2-(methylsulfinyl)-2-(methylthio)ethene,通过甲基(甲硫基)甲基亚砜与相应的芳香醛的 Knoevenagel 型缩合获得,发现与氯化乙基镁反应得到(Z)-1-芳基-2-(甲硫基)乙烯占优势。由于(Z)-1-(甲基亚磺酰基)-1-(甲硫基)-2-苯基乙烯的反应得到(E)-1-(甲硫基)-2-苯基乙烯,本反应似乎是立体定向的。