Synthesis 2022; 54(19): 4339-4346
DOI: 10.1055/a-1863-3494
paper

DABCO-Catalyzed [3+2] Cycloaddition of Isatin-Derived Nitrones and Electron-Deficient Dienes via a 1,6-Addition Reaction

Authors

  • Zihao Luo

    a   Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. of China
  • Zhen Wang

    b   School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, Chongqing 401331, P. R. of China
  • Weijun Yao

    a   Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. of China

We gratefully acknowledge the Natural Science Foundation of Zhejiang Province (Grant LY20B020012, Grant LTZ22B020002), and Fundamental Research Funds for the Central Universities (2022CDJXY-025) for the financial support of this work.


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Abstract

Regio-, chemo-, and diastereoselective [3+2] dipolar cycloadditions of isatin-derived nitrone ylides with penta-2,4-dienenitriles have been developed. The reaction proceeds through the organic base DABCO catalyzed 1,6-addition to linear penta-2,4-dienenitriles, followed by the intramolecular cyclization. This procedure is capable of tolerating a relatively wide range of nitrone ylides under mild conditions, facilitating the preparation of various 1′-hydroxyspiro[indoline-3,2′-pyrrolidine] derivatives.

Supporting Information



Publikationsverlauf

Eingereicht: 27. April 2022

Angenommen nach Revision: 27. Mai 2022

Accepted Manuscript online:
27. Mai 2022

Artikel online veröffentlicht:
05. Juli 2022

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