Formation of Pyrazole Derivatives from [beta]-Substituted Pyridinium Salts

Formation of Pyrazole Derivatives from [beta]-Substituted Pyridinium Salts

Treatment of 1-methyl-3-phenylhydrazonomethyl pyridinium iodides (2a-f) with a base gave pyrazole derivatives (3 and 4) with expulsion of the pyridine ring. A possible mechanism for the formation of pyrazole derivatives id discussed.

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Veröffentlicht in:Chemical & pharmaceutical bulletin 1980-04, Vol.28 (4), p.1265
Hauptverfasser: TANAKA, SHIGERU, WACHI, KAZUYUKI, TERADA, ATSUSUKE
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container_title Chemical & pharmaceutical bulletin
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creator TANAKA, SHIGERU
WACHI, KAZUYUKI
TERADA, ATSUSUKE
description Treatment of 1-methyl-3-phenylhydrazonomethyl pyridinium iodides (2a-f) with a base gave pyrazole derivatives (3 and 4) with expulsion of the pyridine ring. A possible mechanism for the formation of pyrazole derivatives id discussed.
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source J-STAGE Free; EZB-FREE-00999 freely available EZB journals; Free Full-Text Journals in Chemistry
title Formation of Pyrazole Derivatives from [beta]-Substituted Pyridinium Salts
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