The Synthesis and Decomposition of Alkyl Nitronic Esters of 2,6-Di-t-butyl-4-Nitrophenol

John S. Meek, Joanna S. Fowler

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A new synthesis of nitronic esters has been developed by mixing 2,6-di-t-butyl-4-nitrophenol with an acrylate ester and an alkyl phosphite. The rates of thermal decomposition of methyl, ethyl, and isopropyl 3,5-di-t-butyl-4- oxo-2,5-cyclohexadienenitronate to give 3,5-di-t-butylbenzoquinone monoxime have been measured in dimethylformamide and methylcyclohexane and activation parameters have been calculated. The rates were comparable in both solvents and consistent with a cyclic intramolecular decomposition. Saponification of the esters was found but a base-catalyzed decomposition to the oxime could not be detected even in 0.1 N sodium butoxide. Acid-catalyzed hydrolysis cleaved the methyl and isopropyl esters readily to give 2,6-di-t-butyl-4-nitrophenol.

Original languageEnglish
Pages (from-to)226-229
Number of pages4
JournalJournal of Organic Chemistry
Issue number1
StatePublished - 1 Jan 1968
Externally publishedYes


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