METHOD OF SULFINATION OF HETEROCYCLIC COMPOUNDS, METHOD FOR PREPARING 4-SULFINYLPYRAZOLE, AND SULFINAMIDE COMPOUNDS Russian patent published in 1999 - IPC

FIELD: organic synthesis. SUBSTANCE: method consists in interaction of compounds of general formula RS(O)X with heterocyclic compounds, where R is linear or branched C₁-C₄-alkyl substituted by one or several, the same or different, halogen atoms; and X is halogen, hydroxyl or salt-wise substituted hydroxyl, optionally halogen-substituted di-C₁-C₄-alkylamino group; aryloxy, preferably phenoxy group optionally substituted by one or several halogen atoms or C₁-C₄-alkyl or halogen-C₁-C₄-alkyl groups; and said heterocyclic compounds are selected from group including pyrrols, imidazoles, oxazoles, isoxazoles, isothiazoles, thiazoles, and triazoles each optionally substituted by one or several atoms or radicals selected from group including halogen, amino, mono- or dialkylamino, cyano, aryl optionally substituted by one or several halogen atoms and/or one or several alkyls, halogenalkyls or CF₅ group provided that R is group other than n-butyl when heterocyclic compound is pyrrole and R cannot be methyl when heterocyclic compound is 2,5-dimethylpyrrole. Sulfinamide compounds and method for preparing 3-sulfinylpyrazoles are also described. EFFECT: simplified procedure with no loss in total reaction yield. 16 cl, 6 ex