The regioselective synthesis of tepoxalin, 3-[5-(4-chlorophenyl)-1-(4-methoxyphenyl)-3-pyrazolyl]-N-hydroxy-N-me thylpropanamide and related 1,5-diarylpyrazole anti-inflammatory agents
Tepoxalin, a potent anti-inflammatory agent, and its analogs can be synthesized by condensing an appropriate arylhydrazine hydrochloride and a 6-aryl-4,6-dioxohexanoic acid in alcohol with a base catalyst. These diarylpyrazolylpropanoic acids can be converted to their N-methylhydroxamic acids by generating the requisite acid chloride, and allowing it to react with N-methylhydroxylamine.
Murray,Wachter,Barton,Forero-Kelly
p. 18 - 20
(2007/10/02)
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