FIELD: chemistry.
SUBSTANCE: disclosed method of producing sulphonic acid anhydride is characterised by that it involves reaction of sulphonic acid of formula (II): Rf-SO3H (II), where: Rf is a hydrocarbon group with 1-20 carbon atoms which does not or does contain at least one halogen atom, preferably one fluorine atom, and a reactant which represents tautomerism of pseudohalides of an acid containing at least one carbon atom which participates in tautomerism, bonded with two halogen atoms having the following formulae: 
or 
where: R1, R2 denote a hydrogen atom, a linear or branched alkyl group containing 1-4 carbon atoms, a halogen atom, or R1 and R2 are bonded to form a 1,2-phenylene or 1,2-naphthyldiiyl group, X1, X2 denote a halogen atom, preferably both X1 X2 denote a chlorine atom.
EFFECT: method of producing sulphonic acid anhydride, more specifically trifluoromethane sulphonic anhydride.
18 cl, 5 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SYNTHESISING SULFONYLHALOGENIDES AND SULFONAMIDES FROM SALTS OF SULFONIC ACIDS | 2006 |
|
RU2466983C2 |
| METHOD FOR PREPARING ACYLATED 1,3-DICARBONYLIC COMPOUNDS | 2000 |
|
RU2248347C2 |
| SULFONAMIDE DERIVATIVES, METHOD FOR THEIR PREPARING AND METHOD FOR WEED ERADICATION | 1992 |
|
RU2266904C2 |
| METHODS OF SYNTHESIS OF 4-CYANO-4-(SUBSTITUTED INDAZOLE)-CYCLOHEXANE CARBOXYLIC ACID ESTERS USED AS INHIBITORS OF PHOSPHODIESTERASE 4 (PDE 4) AND INTERMEDIATE COMPOUNDS FOR THEIR SYNTHESIS | 1998 |
|
RU2190606C2 |
| METHOD OF OBTAINING DERIVATIVES OF 1,5-DIPHENYLPYRAZOLE CARBOXYLIC ACID | 2005 |
|
RU2326116C1 |
| 2,5-DIOXANE-1,4-DIONES SYNTHESIS METHOD | 2005 |
|
RU2382774C2 |
| 3-ETHYLIDENEHYDRAZINE-SUBSTITUTED HETEROCYCLIC COMPOUNDS AS THROMBOPOIETIN RECEPTOR ACTIVATORS | 2005 |
|
RU2395505C2 |
| CYCLIC AMINE COMPOUND | 2005 |
|
RU2379307C2 |
| SULFONAMIDE DERIVATIVES AND METHOD OF STRUGGLE AGAINST WEEDS | 1990 |
|
RU2047295C1 |
| ANTIARRHYTHMIC COMPOUND PRECURSORS, SYNTHESIS PROCESSES AND METHODS OF APPLICATION | 2006 |
|
RU2422447C2 |
