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。