Synthesis of Linear and Angular Triquinane Skeletons by <i>O</i>-Stannyl Ketyl-Promoted Fragmentation−Cyclization Reactions of α-Keto Cyclopropanes
作者:Eric J. Enholm、Zhaozhong J. Jia
DOI:10.1021/jo961655e
日期:1997.1.1
alpha-ketocyclopropane via O-stannylketyls. A preference for cleavage of the cyclopropane bond with the best orbital overlap with the ketyl radical sp(2)-orbital even in the presence of radical stabilizing groups is indicated by these results. An O-stannylketyl ring scission-cyclization resulted in the novel synthesis of either a linear or an angulartriquinaneskeleton depending on the length and
SmI2-induced ring expansion reactions of alkyl (n+1)-oxobicyclo[n.1.0]alkane-1-carboxylates
作者:Phil Ho Lee、Jukyoung Lee
DOI:10.1016/s0040-4039(98)01749-3
日期:1998.10
Alkyl 4-oxocycloalkanecarboxylates were prepared in good yield via ring expansion reactions of alkyl (n+1)-oxobicyclo[n.1.0]alkane-1-carboxylates mediated by SmI2-induced single electron transfer in THF/MeOH. (C) 1998 Elsevier Science Ltd. All rights reserved.