Compounds containing an oxy in addition to an aldehydic or ketonic group) undergo both condensation and oxidation when treated with phenylhydrazine, forming compounds known as osozones; these are of great importance in characterizing the sugars (q.v.).
Bladin HC -N (Ber., 1892, 25, p. 183) by the action of acetic)NH anhydride on dicyanophenylhydrazine (formed N: CH from cyanogen and phenylhydrazine), the resulting acetyl derivative losing water and yielding phenylmethylcyanotriazole, which, on hydrolysis, gives the free acid.
Posner, Ber., 1901, 34, P. 3975); with hydroxylamine they form isoxazoles, and with phenylhydrazine pyrazoles.
It forms a well-crystallized hydrazone with phenylhydrazine; and a-nitroso propionic acid with hydroxylamine.
They react with hydroxylamine and phenylhydrazine, with the formation of aldoximes and hydrazones.