Copper-catalyzed multicomponent assembly of γ-butenolides <i>via</i> the interception of carbonyl ylides with iminium ions
作者:Mengchu Zhang、Sifan Yu、Ruyu Hua、Dan Zhang、Huang Qiu、Wenhao Hu
DOI:10.1039/d2ob02075k
日期:——
A Cu(I)-catalyzed three-component reaction of cyclopropenes, enamines and aldehydes has been realized. This reaction proceeds via the interception of carbonyl oxonium ylide intermediates with α, β-unsaturated iminium ions that are in situ generated from enamines and aldehydes under the catalysis of Cu(MeCN)4PF6, leading to the desired γ-butenolide derivatives in good yields and with moderate diastereoselectivities
实现了 Cu( I ) 催化的环丙烯、烯胺和醛的三组分反应。该反应通过羰基氧鎓叶立德中间体与在 Cu(MeCN) 4 PF 6催化下由烯胺和醛原位产生的 α, β-不饱和亚胺离子截留进行,从而以良好的方式生成所需的 γ-丁烯内酯衍生物收率和适度的非对映选择性。获得这些带有栓系酮和炔基的衍生物将扩大多取代丁烯内酯的结构多样性。