1,3-Dipolar Cycloaddition of Isatin-Derived Azomethine Ylides with 2<i>H</i>-Azirines: Stereoselective Synthesis of 1,3-Diazaspiro[bicyclo[3.1.0]hexane]oxindoles
作者:Anikó Angyal、András Demjén、Veronika Harmat、János Wölfling、László G. Puskás、Iván Kanizsai
DOI:10.1021/acs.joc.9b00242
日期:2019.4.5
A regio- and diastereoselective 1,3-dipolar cycloaddition of 2H-azirines with azomethine ylides generated in situ from isatins and α-amino acids has been elaborated, affording an unprecedented aziridine-fused spiro[imidazolidine-4,3′-oxindole] framework. This one-pot three-component reaction tolerates a wide range of substrates and enables the construction of highly diverse 1,3-diazaspiro[bicyclo[3
精心设计了2 H-叠氮基与区域的非对映体和非对映体选择性1,3-偶极环加成反应,该叠氮化物是从靛红和α-氨基酸原位生成的,其提供了前所未有的氮丙啶融合螺[imidazolidine-4,3'-oxindole]框架。这种一锅三组分反应可耐受多种底物,并能在温和条件下以高达81%的分离产率构建高度多样化的1,3-二氮杂螺并[双环[3.1.0]己烷]吲哚。