2957-62-2Relevant academic research and scientific papers
The Chemistry of Aryllead(IV) Tricarboxylates. Reaction with Derivatives of Malonic Acid: New Routes to α-Aryl Carboxylic Acids and Arylated Barbituric Acid Derivatives
Kopinski, Richard P.,Pinhey, John T.,Rowe, Bruce A.
, p. 1245 - 1254 (2007/10/02)
Derivatives of 2,2-dimethyl-1,3-dioxan-4,6-dione (Meldrum's acid) and the sodium salts of substituted malonic esters undergo electrophilic C-arylation in high yield with aryllead triacetates, thus providing new routes to α-arylalkanoic acids.Syntheses of the antiflammatory compound 2-(p-isobutylphenyl)propanoic acid (Ibuprofen) have been carried out to demonstrate the method.The arylation reaction has been extended to 5-ethylbarbituric acid and to barbituric acid itself, which affords the 5,5-diarylated derivatives in good yield.A study of the effect of some tertiary bases on the reaction of p-methoxyphenyllead triacetate with the 5-isopropyl derivative of Meldrum's acid has shown that replacement of pyridine by 2,2'-bipyridyl results in an increase in yield and reaction rate, while a further marked improvement occurs in the presence of 1,10-phenanthroline.
