Radical Cyclizations for the Synthesis of Pyrroloindoles: Progress toward the Flinderoles
作者:Joanne E. Curiel Tejeda、Bryan K. Landschoot、Michael A. Kerr
DOI:10.1021/acs.orglett.6b00768
日期:2016.5.6
Under the influence of Lewis acid catalysis, donor/acceptor cyclopropanes underwent nucleophilic ring opening by indolines. The resulting N-alkyl indolines bearing a pendant malonyl moiety oxidatively cyclized to 1,2-pyrroloindoles. This method was showcased by the preparation of the skeletal structure of the flinderoles.
Novel synthesis of selenones: Application to the synthesis of alkyl cyclopropanecarboxylates
作者:A. Krief、W. Dumont、A.F. De Mahieu
DOI:10.1016/0040-4039(88)85139-6
日期:1988.1
Selenones are prepared by oxidation of selenides by hydrogen peroxide-benzeneseleninic acid. They react with α, β -unsaturated esters and alkylidene malonates in the presence of t-BuOK and produce alkyl Cyclopropanecarboxylates.
Nucleophilic Ring Opening of Cyclopropane Hemimalonates Using Internal Brønsted Acid Activation
作者:Michael R. Emmett、Michael A. Kerr
DOI:10.1021/ol201486x
日期:2011.8.19
The reaction of cyclopropanes, geminally disubstituted with one carboalkoxy and one carbohydroxy group, undergoes ring-opening reactions with indole nucleophiles under catalyst-free, hyperbaric (13 kbar) conditions. An internal hydrogen bond is postulated as the mode of activation obviating the need for the Lewis acid catalyst normally used for such donor–acceptor cyclopropane chemistry. These conditions