منابع مشابه
Synthesis of pyrazolone derivatives and their biological activities
3-Methyl-1-phenylpyrazol-5-one and its derivatives prepared using ethyl acetoacetate, phenyl hydrazine and its derivatives. Ethyl acetoacetate reacted with phenylhydrazine at reflux temperature to give 3-methyl-1-phenylpyrazol-5-one crude and recrystlized from diluted ethanol to give pure 3-methyl1-phenylpyrazol-5-one. Different pyrazolone derivatives were prepared by using different phenyl hyd...
متن کاملSynthesis of chloro pyrazolone derivatives and their biological activities
3-Methyl-5-chloro-1-phenylpyrazol and its derivatives were prepared by the reaction with 3methyl -1-phenylpyrazol-5-one, phosphorous oxytrichloride and N-N dimethyl aniline respectively using catalyst. These compounds were further treated with alcohols and sodium hydroxide to form ether linkage. Ethyl acetoacetate reacted with phenylhydrazine at reflux temprature to give 3-methyl-1phenylpyrazol...
متن کاملBeta-enamino esters in heterocyclic synthesis: synthesis of pyrazolone and pyridinone derivatives.
An efficient and convenient synthesis of pyrrolidinones and pyridinones utilizing enamino esters as starting material has been described. The structures of the compounds obtained were confirmed by spectral and elemental analyses.
متن کاملSynthesis and Study of Analgesic, Anti-inflammatory Activities of 3-methyl-5- Pyrazolone Derivatives
Considerable amount of research has been carried out in the field of pyrazolone derivatives due to their diverse biological, pharmacological and chemical properties. The need was felt to synthesize certain 3-methyl-5-pyrazolone derivatives with potent analgesic and anti-inflammatory activity and with lesser side effects as it had been proved of late that the beneficial effects of pyrazolones ou...
متن کاملEnantioselective synthesis of chiral heterocycles containing both chroman and pyrazolone derivatives catalysed by a chiral squaramide.
An efficient chiral squaramide-catalysed enantioselective Michael addition of pyrazolin-5-ones to 3-nitro-2H-chromenes for the synthesis of chiral heterocyclic systems containing both chroman and pyrazolone derivatives has been developed. This reaction afforded the desired products in high to excellent yields (up to 98%) with high enantioselectivities (up to 96%) and excellent diastereoselectiv...
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ژورنال
عنوان ژورنال: YAKUGAKU ZASSHI
سال: 1961
ISSN: 0031-6903,1347-5231
DOI: 10.1248/yakushi1947.81.12_1727