Yb(OTf)<sub>3</sub>-Catalyzed Formal (4 + 3) Cycloaddition Reactions of 3-Benzylideneindoline-2-thiones with Donor–Acceptor Cyclopropanes
作者:Yan Jiang、Hao-Jie Ma、Xue-Long Wang、Yi Yang
DOI:10.1021/acs.joc.3c01609
日期:2023.10.20
A Yb(OTf)3-catalyzedformal (4 + 3) cycloaddition reaction of donor–acceptor cyclopropanes with 3-benzylideneindoline-2-thiones as sulfur-containing 4π components has been successfully achieved. A series of functionalized 5,10-dihydro-2H-thiepino[2,3-b]indolederivatives were synthesized with good yields and moderate to good diastereoselectivity. The reaction described herein represented the inaugural
成功实现了Yb(OTf) 3催化供体-受体环丙烷与3-亚苄基二氢吲哚-2-硫酮作为含硫4π组分的形式(4 + 3)环加成反应。合成了一系列功能化的5,10-二氢-2H-硫杂吡啶并[2,3- b ]吲哚衍生物,具有良好的收率和中等至良好的非对映选择性。本文描述的反应代表3-亚苄基二氢吲哚-2-硫酮的首次(4+3)环加成。