Synthesis of Some New Pyrazole, Pyrimidine, Pyridazine, and Their Fused Derivatives from 3-Oxo-3,N-diphenylpropionamideThe title compounds were obtained from the reactions of 3-oxo-3,N-diphenylpropionamide 3 with dimethylformamide dimethylacetal followed by hydrazine to afford the pyrazole 7, ...
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Synthesis of pyrazoles via electrophilic cydization of α,β-alkynic hydrazones by copper(I) iodide in the presence of triethylamine in refluxing acetonitrile, α,β-alkynic hydra-zones, prepared readily from hydrazines and propargyl aldehydes and ketones, undergo electrophilic cyclization to afford ...
SynthesisA series of novel diacylhydrazine derivatives containing a N‐pyrazolepyrazole heterocycle was designed, synthesized and evaluated for insecticidal activity against Plutella xylostella, Nilaparvata lugens, Mythimna separata, Culex pipiens pallens, Helicoverpa armigera, and Ostrinia nubilalis. The ...
The novel thiosemicarbazide derivative was prepared by hydrazinolysis of isothiocyanatosulfonamide with hydrazine hydrate. It was used as a starting material for the synthesis of some novel pyrazolosulphaphenazole, phthalazine, thiourea, and 1,2,4-triazolbenzenesulfonamide derivatives. Isothiocyanato sulf...
Reaction of ketene derivatives (1a,b) on treatment with 4-amino-1-phenyl-2,3-dimethyl pyrazolin-5-one gives compounds (2a,b) which react with hydrazine to ... EMM Kassem,SE Difrawy,OA Fathalla,... 被引量: 0发表: 1993年 Synthesis of 7-substituted-4-(3',4',5'-trisubstituted-1-...
The present work deals with synthesis of some new isoxazole and Pyrazole derivatives which obtained by reaction takes place between the chemicals hydroxyl amine hydrochloride and hydrazine hydrate with synthesized Chalcones (by Claisen-Schmidt condensation) in a refluxing ethanolic medium in alkali ...
Synthesis and Herbicidal Activity of Some Novel Pyrazole DerivativesDiacylhydrazinepyrazolesynthesi herbicidal activitySome novel pyrazole derivatives were designed and synthesized through multi-step reactions from substituted phenol as starting material. Their structures were confirmed by 1H NMR, FTIR, MS and...
The synthesis of sodium salt of cyanoacetaldehyde was carried out using acetonitrile,sodium ethoxide and carbon monoxide through high-pressure reaction.The salt was neutralized to give a solution of cyanoacetaldehyde.The 5-aminopyrazoles was synthesized by the reaction of cyanoacetaldehyde with hydraz...
Key Intermediates: A Simple and Highly Selective Synthesis of 5-Amino-1-aryl-1H-pyrazole-4-carbonitriles for Applications in the Crop ProtectionAryl PyrazoleAryl HydrazineAmino Pyrazole5-Amino-1-aryl-1H-pyrazole-4-carbonitrilesA series of six pyrazoles was synthesized by Michael-type addition ...