SYNTHESIS AND STRUCTURAL DETERMINATION OF 5-ARYLAMINO-1,3-DIMETHYLPYRAZOLES

Authors

  • В. Н. Брицун Institute of Organic Chemistry, Ukraine National Academy of Sciences, Kiev 02094
  • И. М. Базавова Institute of Organic Chemistry, Ukraine National Academy of Sciences, Kiev 02094
  • В. Н. Боднар Institute of Organic Chemistry, Ukraine National Academy of Sciences, Kiev 02094
  • А. Н. Чернега Institute of Organic Chemistry, Ukraine National Academy of Sciences, Kiev 02094
  • М. О. Лозинский Institute of Organic Chemistry, Ukraine National Academy of Sciences, Kiev 02094

DOI:

https://doi.org/10.1007/8410

Keywords:

4-arylamino-4-thioxo-2-butanone, 5-arylamino-1, 3-dimethylpyrazoles, 1, 5-dimethyl-3-phenylaminopyrazole, methylhydrazine

Abstract

Treatment of 4-arylamino-4-thioxo-2-butanones with methylhydrazine in acetic acid gives 5-arylamino-1,3-dimethylpyrazoles which are readily halogenated  in the 4 position. The thermal decomposition of 3-anilino-1,2,5-trimethyl-1H-pyrazolium chloride gives 1,3-dimethyl-5-phenylaminopyrazole  and 1,5-dimethyl-3-phenylaminopyrazole in the approximate ratio of 1: 1.

How to Cite
Britsun, V. N.; Bazavova, I. M.; Bodnar, V. N.; Chernega, A. N.; Lozinskii, M. O.  Chem. Heterocycl. Compd. 2005, 41, 105. [Khim. Geterotsikl. Soedin. 2005, 120.]

For this article in the English edition, see DOI 10.1007/s10593-005-0115-6


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Published

2023-12-06

Issue

No. 1 (2005)

Section

Original Papers