Reactions of Polymer-Supported α-Selenoaldehydes with Grignard Regents. A Facile Solid-Phase Stereoselective Synthesis of (<i>E</i>)-1,2-Disubstituted Ethenes
作者:Shou-Ri Sheng、Xian Huang
DOI:10.1002/jccs.200300125
日期:2003.8
Polymer-supported α-selenoaldehydes easily obtained by reaction of polymer-supported 4-(phenyl-seleno)morpholine with aldehydes react with Grignard reagents to form polymer-supported (3-hydroxyalkyl selenides, which were treated with thionyl chloride/triethylamine leading to (E)-1,2-disubstituted ethenes in good yields.
聚合物负载的 α-硒醛很容易通过聚合物负载的 4-(苯基-硒基)吗啉与醛与格氏试剂反应形成聚合物负载的 (3-羟烷基硒化物) 反应得到,然后用亚硫酰氯/三乙胺处理得到 ( E)-1,2-二取代乙烯,收率良好。