THE MICHAEL REACTION IN NON-ALKALINE MEDIA. Ⅷ. THE C9-PRECURSOR, POTASSIUM METHYL 4， 4-DINITRO-2-HYDROXYBUTYRATE

摘要

From the examination of the changes in the ultra-violet spectra with time of the nitroform-methyl acrylate system and methyl 4,4,4-trlnitrobutyrate decomposition in aqueous dioxan (pH ≈ 5), it was shown that potassium methyl 4,4-dinitro-2-hydroxybutyrate is the precursor of dimethyl 4,4-dinitro-2-hydroxypimelate (C9). The only path for the formation of potassium methyl 4,4-dinitrobut-2-enoate was found to be the elimination of the elements of nitrous acid from methyl 4,4,4-trlnitrobutyrate.nThe isolation and characterization of potassium methyl 4,4-dinitro-2-hydroxybutyrate and the potassium salt of 5,5-dinitro-3-hydroxypentan-2-one, the methyl vinyl ketone analog, are described.