Template-Induced Enantioselectivity in the Reductive Radical Cyclization of 3-(3-Iodopropoxy)propenoic Acid Derivatives Depending on the Binding Motif
作者:Thorsten Bach、Peter Kapitán
DOI:10.1055/s-2008-1067024
日期:2008.5
motifs HXC=O have been screened in the enantioselective radical cyclization of various linear derivatives of 3-(3-iodopropoxy)propenoic acid. The reactions were performed in the presence of an enantiomerically pure, chiral 1,5,7-trimethyl-3-azabicyclo[3.3.1]nonan-2-one derivative, which acts as a hydrogen-binding template. The cyclized products were obtained in good to excellent yields (66-88%). Enantioselectivities
在 3-(3-碘代丙氧基) 丙烯酸的各种线性衍生物的对映选择性自由基环化中筛选了不同的结合基序 HXC=O。该反应在对映体纯的手性 1,5,7-trimethyl-3-azabicyclo[3.3.1]nonan-2-one 衍生物的存在下进行,该衍生物充当氢结合模板。环化产物以良好至优异的产率获得(66-88%)。实现了高达 59% ee 的对映选择性。