Oxidative tandem alkoxide conjugate addition to nitroalkenes/radical 5-exo cyclizations—a versatile synthesis of functionalized 3-nitrotetrahydrofurans
作者:Ullrich Jahn、Dmytro Rudakov、Peter G. Jones
DOI:10.1016/j.tet.2011.12.010
日期:2012.2
were conveniently obtained in moderate to good yield and moderate to very good diastereoselectivity by an oxidative tandem process consisting of conjugateadditionreaction of lithium allyloxides to nitroalkenes followed by SET oxidation of the resulting nitronates. This triggers a radical cyclization; ligand transfer from the oxidant provides the products. The influence of the counter ion of the initial
Cu(II)-Mediated One-Pot Alkoxide Conjugate Addition/Radical Cyclizations as a Versatile Method to Highly Functionalized Tetrahydrofuran Derivatives
作者:Ullrich Jahn、Dmytro Rudakov
DOI:10.1055/s-2004-822930
日期:——
The synthesis of highly functionalized 3-nitrotetrahydro-furans starting from allylic alcohols and nitroalkenes through an efficient CuCl 2 -mediated tandem anionic/radical process is reported. The one-pot reaction consists of oxa-Michael addition/SET/radical 5-exo-cyclization-ligand transfer. Functionalization of the THF ring is facile and provides diverse substituted derivatives.