HALIDES OF HALOGENSULFONYBENZOIC ACID, METHOD OF OBTAINING IT AND ITS USE FOR OBTAINING THE SUBSTITUTED PHENYLSULFONYLUREAS Russian patent published in 2008 - IPC C07D251/42 C07D213/50 C07C311/18 C07C309/89 

FIELD: chemistry.

SUBSTANCE: invention relates to the method of obtaining compounds of the formula (I) or its salt, where Q, X*, Y, Z, R, R¹, R² and R³ are defined as in point 1, (Ia), (II): (R*=Hal, R**=Hal), (III): (R*=-Q-R, R**=Hal), (V): R*=-Q-R, R**=-NCO), that is characterised by the fact that a) the bond II), where Hal=halogen atom is subjected to mono-etherification to the bond (III), b) or b1) is subjected to ammonolysis and phosgenation to the bond (V), or b2) is subjected to interaction with cyanate to the bond (V), and c) the obtained bond (V) is subjected to interaction with aminoheterocycle H₂N-Het (Het=heterocycle) as in (I) to the connection (I) or its salt. Some bonds (II) and stabilised N-heteroaromatic compounds of the intermediate products (VII), the bonds (V) are new. The bonds (II) can be obtained from the appropriate sulfobenzoic acids by interaction with haloanhydrides of the acids of sulfur and phosphorous in non-polar organic solvents.

EFFECT: improved method of obtaining compounds.

19 cl, 7 ex