METHOD OF PRODUCING MONO- AND DICARBAMOYL DERIVATIVES OF METHYLENE DIPHENYL-4,4'-DIAMINE (VERSIONS) Russian patent published in 2024 - IPC C07C273/18 C07C275/28 C07B43/06 

FIELD: chemistry.

SUBSTANCE: invention relates to organic chemistry, specifically to a method of producing mono- and dicarbamoyl derivatives of methylene diphenyl-4,4'-diamine (versions), which is characterized by that urea and methylene diphenyl-4,4'-diamine are used as reagents, solvent used is water with dielectric constant at normal physical conditions 80.1-80.9, wherein calculated amounts of initial components are loaded into reactor, mixing for 3-24 hours at pressure of 6 atm and temperature of 90-160 °C, cooling and unloading the reaction mixture, washing it with the same solvent, filtering the precipitate and analysing the total content of the products. In the second version of the invention, the solvent used is aprotic non-aromatic solvents with a dielectric constant of 36.6-47.2.

EFFECT: providing methods of producing and increasing output of target products.

4 cl, 2 tbl, 30 ex