Metallic samarium promoted reductive dimerization cyclization of gem-diactivated alkenes, reductive debromination of vic-dibromides, and reduction of sodium alkyl thiosulfates in aqueous media
作者:Lei Wang、Yongmin Zhang
DOI:10.1016/s0040-4020(99)00602-x
日期:1999.8
solution at room temperature, metallic samarium promoted reductive dimerization cyclization of gem-diactivated alkenes, reductive debromination of vic-dibromides, and reduction of sodium alkyl thiosulfates occur to afford corresponding functionalized cyclopentenes, (E)-alkenes, and disulfides, respectively in good yield. Only sub-stoichiometric quantities of samarium are employed in the former reactions
在饱和NH 4 4氯(AP) -在室温下的THF溶液,金属钐促进的还原二聚环化宝石-diactivated烯烃,的还原脱溴VIC烷基硫代硫酸盐发生,得到相应的官能化的环戊烯-dibromides,并减少钠,(Ë链烯和二硫化物,分别具有良好的收率。在前面的反应中仅使用低于化学计量的sa,并且反式或反式,反式异构体是多取代环戊烯产物的主要产物。