The title compound, C(4)H(10)N(3)O(2)(+) x C(2)H(2)NO(3)(-) x C(2)H(3)NO(3), contains at least 11 distinct hydrogen-bond interactions showing a great variety of bond strengths. The shortest and strongest hydrogen bond [O...O = 2.5004 (12) A] is found between the uncharged oxamic acid molecule and the oxamate monoanion. The grouping formed by such a strong hydrogen bond can thus be considered as...

A novel Pd-catalyzed decarboxylative cross-coupling of oxamic acids with potassium phenyltrifluoroborates has been realized under mild reaction conditions. This method provides an efficient access to N-mono- or N,N-disubstituted benzamides and benzoates.

We report a new electrochemical supporting-electrolyte-free method for synthesizing ureas, carbamates, and thiocarbamates via the oxidation of oxamic acids. This simple, practical, phosgene-free route includes generation an isocyanate intermediate in situ anodic decarboxylation acid presence organic base, followed by one-pot addition suitable nucleophiles to afford corresponding thiocarbamates....

Glyphosate, one of the organophosphate herbicides, has been widely used in the word. The removal of glyphosate was comparatively investigated by MnO2 oxidation, electrochemical oxidation, and electrochemically assisted MnO2 oxidation (electro-MnO2) processes. The effects of MnO2 dosage, current density, and solution pH on glyphosate removal and Mn release were examined. The results indicated th...

Allantoin occurs widely in nature, where it arises from the oxidation of uric acid (1, 2). Animals, plants, and bacteria convert allantoin to glyoxylic acid and urea via allantoic acid (14). The aerobic oxidation of allantoin by a species of Pseudomonas has been studied in detail (4), but the pathway of allantoin fermentation is incompletely known. That the aerobic and anaerobic pathways of all...