abstract |
The process for the preparation of 3-hydroxypyrazole of formula I, wherein the nitrogen atom is n, where R is 1. is halogen, cyano, SO 3, NH, COOH, alkyl, alkenyl, alkynyl, phenyl or naphthyl substituted alkyl, alkenyl, alkynyl, cycloalkyl, phenyl or naphthyl; sup.3.n. water, cyano, halogen and halogen, cyano, SO 3, COOH, alkyl, alkenyl, alkynyl, phenyl or naphthyl substituted alkyl, alkenyl, alkynyl, cycloalkyl, or phenyl, pyrazolidin-3-one oxidation of formula (II), the reaction being carried out with water from the set by the acid as the oxide (s) is a composition. \ t |