Open Access
CC BY-NC-ND 4.0 · SynOpen 2022; 06(03): 164-172
DOI: 10.1055/a-1866-4653
paper

Concise One-Pot Multicomponent Reaction Approach to Mono­fluo­rinated Spiro-pyrazole-pyridine Derivatives without Additional Catalyst

Authors

  • Ying Liu

    a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China
  • Yiping Zhang

    a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China
  • Yingkai Zhou

    a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China
  • Min Zhang

    a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China
  • Hongmei Deng

    c   Laboratory for Microstructures, Shanghai University, Shanghai 200444, P. R. of China
  • Liping Song

    a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China
    b   Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. of China

The authors thank the Data Center of Management Science, National Natural Science Foundation of China - Peking University (NNSFC, Grant No. 21272153), and also the Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences for financial support.


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Abstract

Monofluorinated bis-heterocyclic spirocycles: functionalized ethyl 9-fluoro-8-methyl-1,4-dioxo-2,3,6,10-tetraphenyl-2,3,7-triazaspiro[4.5]dec-7-ene-9-carboxylate derivatives were efficiently synthesized from readily available 1,2-diphenylpyrazolidine-3,5-dione, ethyl 2-fluoroacetoacetate, aromatic aldehydes, and ammonium acetate via one-pot four-component reactions in the absence of additional catalyst. In the protocols, ammonium acetate serves not only as the fourth component but also as the catalyst.

Supporting Information



Publication History

Received: 18 April 2022

Accepted after revision: 16 May 2022

Accepted Manuscript online:
01 June 2022

Article published online:
02 August 2022

© 2022. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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