Issue 5, 1997
From the journal:

Journal of the Chemical Society, Perkin Transactions 1

A convenient synthesis of alkynylpyrazoles

Mitsuhiro Yoshimatsu,   Masataka Kawahigashi,   Eiji Honda  and  Tadashi Kataoka  

Abstract

Diazomethane add to the enyne sulfones 1, 3, 4, 6–11 regio- and stereo-selectively to give the 4-alkynyl-5-phenylsulfonyl-4,5-dihydro-3H-pyrazoles 12–15 and 17–19, which are converted by MeLi into the 4-alkynyl-1H-pyrazoles 24, 25, 16, 26, 28, 30 in good yields. 4,5-Bis(alkynyl)-1H-pyrazoles 34, 37 are also obtained by the same procedure.

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Article information

DOI
https://doi.org/10.1039/A605542G
Article type
Paper

J. Chem. Soc., Perkin Trans. 1, 1997, 695-700

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A convenient synthesis of alkynylpyrazoles

M. Yoshimatsu, M. Kawahigashi, E. Honda and T. Kataoka<img border="0" src="https://www.rsc.org/images/entities/char_200a.gif" alt=" " xmlns="http://www.rsc.org/schema/rscart38" />, J. Chem. Soc., Perkin Trans. 1, 1997, 695 DOI: 10.1039/A605542G

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