Cyclopentane ring formation in the cycloaddition reaction of 3-alkenyl radicals to radicophilic olefins
作者:Radomir N. Saičić、Živorad Čeković
DOI:10.1016/s0040-4020(01)81532-5
日期:1990.1
well as of 5- -cyclization of intermediary 5-hexenyl type radical (), was achieved. The fate of intermediary cyclopentylmethyl radicals ( and ) depends on the nature of substituents attached to radical carbon. In case of alkyl groups (), the nucleophilic reactivity of radical intermediates was increased and an intermolecular addition reaction occurred with the formation of a new C-C bond. However, in
Homoallyl radical, e.g. , reacts with an electron-deficient olefinic bond with a new CC bond forming and arising of a 5-hexenyl radical which further undergoes to cyclization with a cyclopentane ring () annulation.