Synthesis 2019; 51(17): 3345-3355
DOI: 10.1055/s-0037-1611837
paper
© Georg Thieme Verlag Stuttgart · New York

One-Pot Synthesis of Trifluoromethylated Pyrazol-4-yl-pyrrole-2,5-dione Derivatives

Fangchong Yuan
a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China   eMail: lpsong@shu.edu.cn
,
Wenwen Duan
a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China   eMail: lpsong@shu.edu.cn
,
Zeyu Li
a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China   eMail: lpsong@shu.edu.cn
,
Xi Luo
a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China   eMail: lpsong@shu.edu.cn
,
Min Zhang
a   Department of Chemistry, School of Science, Shanghai University, No. 99, Shangda Road, Shanghai 200444, P. R. of China   eMail: lpsong@shu.edu.cn
,
Hongmei Deng
b   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   eMail: lpsong@shu.edu.cn
c   Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, P. R. of China
› Institutsangaben
The authors thank the National Natural Science Foundation of China (No. 21272153), and the Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry for financial support.
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Publikationsverlauf

Received: 18. März 2019

Accepted after revision: 29. April 2019

Publikationsdatum:
21. Mai 2019 (online)


Abstract

Efficient and convenient one-pot, three-component reactions of pyrrolidone, aromatic aldehydes and 1-phenyl-3-trifluoromethyl-5-pyrazolone afforded highly functionalized trifluoromethylated pyrazol-4-ylpyrrole-2,5-dione derivatives in good yields. The effect of solvents on the reaction efficiency and yield was briefly investigated. The structures of products were determined by spectral methods and X-ray diffraction analysis. The latter showed that the products formed have a strong intramolecular hydrogen bond, which made them particularly stable and the corresponding annulated products were not obtained by treatment with dehydrating reagents.

Supporting Information