A radical cyclization route to pyrrolidines based on conjugate addition to electron deficient phenylselenenylalkenes
作者:Stefan Berlin、Lars Engman
DOI:10.1016/s0040-4039(00)00446-9
日期:2000.5
β-unsaturated esters, amides, ketones, nitriles and sulfones were prepared by zinc chloride promoted chloroselenation/dehydrochlorination of the corresponding α,β-unsaturated compounds. After Michael addition of allyl or propargylamine and triethylborane initiated reductive radical cyclization in the presence of tris(trimethylsilyl)silane, pyrrolidine and dihydropyrrole derivatives, respectively, were
通过氯化锌促进相应的α,β-不饱和化合物的氯硒化/脱氯化氢反应制得α-苯基硒烯基-α,β-不饱和酯,酰胺,酮,腈和砜。在三(三甲基甲硅烷基)硅烷存在下,迈克尔加成烯丙基或炔丙基胺和三乙基硼烷引发还原性自由基环化反应后,分别得到吡咯烷和二氢吡咯衍生物。