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Ragavan et al. Organic and Medicinal Chemistry Letters 2013, three:6 http://orgmedchemlett/content/3/1/ORIGINAL ARTICLEOpen Access-Keto esters from ketones and ethyl chloroformate: a speedy, basic, efficient synthesis of pyrazolones and their antimicrobial, in silico and in vitro cytotoxicity studiesRamasamy Venkat Ragavan1, Kalavathi Murugan Kumar2, Vijayaparthasarathi Vijayakumar1*, Sundaramoorthy Sarveswari1, Sudha Ramaiah2, Anand Anbarasu1,two, Sivashanmugam Karthikeyan1,three, Periyasamy Giridharan4 and Nalilu Suchetha KumariAbstractBackground: Pyrazolones are traditionally synthesized by the reaction of -keto esters with hydrazine and its derivatives. There are actually strategies to synthesize -keto esters from esters and aldehydes, but these solutions have main limitation in varying the substituents. Usually, you can find numerous strategies which include acylation of enolates in which a chelating effect has been employed to lock the enolate anion applying lithium and magnesium salts; on the other hand, these strategies suffer from inconsistent yields inside the case of aliphatic acylation.Buy939793-16-5 There are actually methods to synthesize -keto esters from ketones like caboxylation of ketone enolates using carbon dioxide and carbon monoxide sources inside the presence of palladium or transition metal catalysts.4-Nitrobutan-1-ol Purity At present, by far the most general and very simple process to synthesize -keto ester may be the reaction of dimethyl or ethyl carbonate with ketone in the presence of powerful bases which also calls for long reaction time, use of excessive quantity of reagent and inconsistent yield.PMID:24513027 These variables lead us to create a very simple strategy to synthesize -keto esters by altering the base and reagent. Results: A series of -keto esters have been synthesized from ketones and ethyl chloroformate in the presence of base which in turn are converted to pyrazolones then subjected to cytotoxicit.