Isatin <i>N</i>,<i>N</i>′-Cyclic Azomethine Imine 1,3-Dipole and Abnormal [3 + 2]-Cycloaddition with Maleimide in the Presence of 1,4-Diazabicyclo[2.2.2]octane
作者:Xiao Wang、Peng Yang、Yong Zhang、Chao-Zhe Tang、Fang Tian、Lin Peng、Li-Xin Wang
DOI:10.1021/acs.orglett.6b03815
日期:2017.2.3
A new isatin N,N′-cyclic azomethine imine synthon was devised, and an unexpected abnormal [3 + 2]-cycloaddition with maleimide catalyzed by 1,4-diazabicyclo[2.2.2]octane (DABCO) has been disclosed. A variety of tricyclic spiropyrrolidine oxindoles bearing a dinitrogen heterocycle and succinimide scaffold were obtained in excellent yields (up to 96%) and diastereoselectivities (up to 97:3) under mild
设计了一种新的Isatin N,N'-环甲亚胺亚胺合子,并公开了1,4-二氮杂双环[2.2.2]辛烷(DABCO)催化的马来酰亚胺意外异常[3 + 2]-环加成反应。在温和条件下,以优异的收率(高达96%)和非对映选择性(高达97:3)获得了多种带有二氮杂环和琥珀酰亚胺支架的三环螺吡咯烷恶唑。