Fe-Catalyzed Selective Cyclopropanation of Enynes under Photochemical or Thermal Conditions
作者:Marie-Idrissa Picher、Bernd Plietker
DOI:10.1021/acs.orglett.9b04521
日期:2020.1.3
nucleophilic Fe-complex Bu4N[Fe(CO)3(NO)] (TBA[Fe]) catalyzes the cyclopropanation of enynes to substituted propargyl cyclopropanes using diazoesters as carbene surrogates. The catalyst can be activated either thermally in the presence of catalytic amounts of 4-nitroanisole or under photochemical conditions. Cyclopropanation occurs selectively at the enyne moiety; alternative olefinic moieties remain intact