Enantioselective Synthesis of Tetrahydrofuran Derivatives by Sequential Henry Reaction and Iodocyclization of γ,δ-Unsaturated Alcohols
作者:Li-Yan Chen、Jia-Rong Chen、Hong-Gang Cheng、Liang-Qiu Lu、Wen-Jing Xiao
DOI:10.1002/ejoc.201402396
日期:2014.8
Cu-catalyzed asymmetric Henry reaction and iodocyclization is disclosed. The transformation provides efficient access to biologically and synthetically useful 2,2,5-trisubstituted tetrahydrofuran derivatives. The combination of Cu(OAc)2·H2O with a novel chiral sulfoxide–Schiff base hybrid ligand under mild reaction conditions tolerates a wide range of 4-substituted γ,δ-unsaturated aldehydes, and the subsequent
公开了连续的一锅铜催化的不对称亨利反应和碘环化反应。该转化提供了对生物和合成有用的 2,2,5-三取代四氢呋喃衍生物的有效途径。Cu(OAc)2·H2O 与新型手性亚砜-席夫碱杂化配体在温和反应条件下的结合可耐受范围广泛的 4-取代 γ,δ-不饱和醛,随后的碘环化反应可提供相应的产物。产率优异的对映选择性。该产品可以很容易地转化为具有优异非对映选择性和对映选择性的胺。