Formal Alkylation of Allenes through Highly Selective Radical Cyclizations of Allene-enes
作者:Rong Zeng、Chunling Fu、Shengming Ma
DOI:10.1002/anie.201107747
日期:2012.4.16
example of alkene‐to‐allene radical cyclization of allene‐enes is reported. The highly chemoselective intermolecular radical addition reaction of the alkene and subsequent, exclusive exo‐radical addition to the allene was realized with perfluoroalkyl radicals (see scheme). A subsequent TBAF‐promoted dehydroiodination of the cyclization products forms cyclopentanes and regenerates an allene moiety (TBAF=t
自由基:报导了烯-烯的烯-烯基自由基环化的第一个例子。烯烃和随后的,独占的高度化学选择性分子间基加反应外型-基团除丙二烯与全氟烷基的基团(参见方案)来实现。随后TBAF促进的环化产物的脱氢碘化反应形成环戊烷,并再生出异戊二烯部分(TBAF =四正丁基氟化铵)。