Synlett 2021; 32(14): 1447-1452
DOI: 10.1055/a-1535-8891
letter

Decarboxylative, Diastereoselective and exo-Selective 1,3-Dipolar Cycloaddition for Diversity-Oriented Construction of Structural Spiro[Butyrolactone–Pyrrolidine–Chromanone] Hybrids

Authors

  • Dong-Gui Guo

    a   College of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang, 550025, P. R. of China
  • Zheng Li

    b   National & Local Joint Engineering Research Center for the Exploitation of Homology Resources of Medicine and Food, Guizhou University, Guiyang, Guizhou 550025, P. R. of China
  • Xiao-Xue Han

    b   National & Local Joint Engineering Research Center for the Exploitation of Homology Resources of Medicine and Food, Guizhou University, Guiyang, Guizhou 550025, P. R. of China
  • Lei Zhang

    b   National & Local Joint Engineering Research Center for the Exploitation of Homology Resources of Medicine and Food, Guizhou University, Guiyang, Guizhou 550025, P. R. of China
  • Min Zhang

    b   National & Local Joint Engineering Research Center for the Exploitation of Homology Resources of Medicine and Food, Guizhou University, Guiyang, Guizhou 550025, P. R. of China
  • Xiong-Li Liu

    b   National & Local Joint Engineering Research Center for the Exploitation of Homology Resources of Medicine and Food, Guizhou University, Guiyang, Guizhou 550025, P. R. of China

We are grateful for the financial support from the NSFC (81760625 and 22061006) and Science and Technology Program of Guizhou Province ([2020]4Y205, [2020]1Z074, [2018]5781, and [2017]7295).


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Abstract

Inspired by the chemistry and biology of butyrolactones, pyrrolidines, and chromanones, we successfully developed a simple domino 1,3-dipolar cycloaddition of homoserine-lactone-derived azomethine ylides for the construction of biologically important spiro[butyrolactone–pyrrolidine–chromanone] hybrids in the presence of Et3N as a catalyst under mild conditions. The reaction is based on the application of carboxylic-acid-activated chromones as dienophiles, followed by a decarboxylation process. This reaction displayed good substrate tolerance and gave the desired products in moderate to good yields with high diastereoselectivities (up to 85% yield and >20:1 diastereomeric ratio) via an exo-transition state. This is the first example of an introduction of a chromanone moiety into a spiro[butyrolactone-pyrrolidine] framework, which might be valuable in medicinal chemistry.

Supporting Information



Publication History

Received: 24 April 2021

Accepted after revision: 24 June 2021

Accepted Manuscript online:
24 June 2021

Article published online:
15 July 2021

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