METHOD OF PRODUCING DITHIINE TETRACARBOXYDIIMIDES Russian patent published in 2015 - IPC C07D495/14 

FIELD: chemistry.

SUBSTANCE: invention relates to novel method of producing dithiine tetracarboxydiimides of general formula: wherein R¹ and R² are identical or different and denote hydrogen, an alkyl with 1-8 carbon atoms, optionally monosubstituted or polysubstituted with halogen, -OR³, -COR⁴, cycloalkyl with 3-7 carbon atoms, optionally monosubstituted or polysubstituted with halogen, alkyl with 1-4 carbon atoms or haloalkyl with 1-4 carbon atoms, aryl, optionally monosubstituted or polysubstituted with halogen, alkyl with 1-4 carbon atoms, haloalkyl with 1-4 carbon atoms, -COR⁴ or sulphonylamino, or arylalkyl with 1-4 carbon atoms in the alkyl, optionally monosubstituted or polysubstituted with halogen, alkyl with 1-4 carbon atoms, haloalkyl with 1-4 carbon atoms, -COR⁴ or sulphonylamino, R³ denotes hydrogen, alkyl with 1-4 carbon atoms, alkylcarbonyl with 1-4 carbon atoms in the alkyl or aryl, optionally monosubstituted or polysubstituted with halogen, alkyl with 1-4 carbon atoms or haloalkyl with 1-4 carbon atoms, R⁴ denotes hydroxy, alkyl with 1-4 carbon atoms or alkoxy with 1-4 carbon atoms, characterised by that dichloromaleimides of formula: wherein R is identical to the residue R¹ or R², in a solvent or a mixture of solvents is subjected to conversion with an inorganic thiosulphate in molar ratio of thiosulphate between 1.3 and 1.6 mol/mol dichloromaleimide of formula (VI).

EFFECT: novel method of producing dithiine tetracarboxydiimides.

2 cl, 12 ex