Issue 23, 2014
From the journal:

Organic & Biomolecular Chemistry

Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones†

Yu Zhu,a   Jun-Jie Hong,a   Yun-Bin Zhou,a   Yu-Wei Xiao,a   Min Lina  and  Zhuang-Ping Zhan*a  

* Corresponding authors

a Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
E-mail: zpzhan@xmu.edu.cn

Abstract

Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones with sulfonyl group migrations has been developed. A key feature of these reactions is that the migrations of the sulfonyl groups to different positions can be controlled by changing the Lewis acids.

Graphical abstract: Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones

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Article information

DOI
https://doi.org/10.1039/C4OB00550C
Article type
Communication
Submitted
12 Mar 2014
Accepted
10 Apr 2014
First published
10 Apr 2014

Org. Biomol. Chem., 2014,12, 3797-3801

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Selective synthesis of 4-(sulfonyl)-methyl-1H-pyrazoles and (E)-4,5-dihydro-1H-pyrazoles from N-allenic sulfonylhydrazones

Y. Zhu, J. Hong, Y. Zhou, Y. Xiao, M. Lin and Z. Zhan, Org. Biomol. Chem., 2014, 12, 3797 DOI: 10.1039/C4OB00550C

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