Radical annulation methodology. 2-Vinylcyclopentane derivative formation by a 3 + 2 cycloaddition reaction
作者:Radomir N. Saic̆ić、Z̆ivorad C̆eković
DOI:10.1016/s0040-4039(00)97582-8
日期:1990.1
By thermally or photolytically induced decomposition of O-acyl derivatives of N-hydroxypyridine-2-thione or other thiohydroxamic esters, in the presence of an excess of electron deficient olefins, 2-vinylcyclopentane derivatives were obtained. This sequence of addition/cyclization/elimination reaction is mediated by a phenylthio radical.
Radical cyclization reactions. Cyclopropane ring formation by 3-exo-cyclization of 5-phenylthio-3-pentenyl radicals
作者:Živorad Čeković、Radomir Saičić
DOI:10.1016/s0040-4039(00)98035-3
日期:1990.1
Free radicalcyclopropane ring closure was accomplished by thermal decomposition of thiohydroxamic esters of 6-phenylthio-4-hexencic acids. When the reaction was performed in the presence of acrylonitrile; an addition/cyclization/elimination process took place and the corresponding cyclopentanecarbonitriles were obtained.