Abstract:
The present invention provides a catalytic process for preparing perfluoroethanesulfonyl fluoride and/or perfluorodiethylsulfone by reaction of tetrafluoroethylene with sulphuryl fluoride in a polar aprotic solvent using a two-part catalyst system comprising a metal fluoride and a crown ether.
Abstract:
The present invention relates to a method for the production of compounds of general formula (I) from compounds of general formula (II) and sulfite salts with subsequent halogenation. The solvent used in halogenation is an organic solvent that may be fully or partly mixed with water. The invention also relates to the use of sulfonyl halogenides for the synthesis of active substances.
Abstract:
A process for preparing a halogenoalkylsulfonamide derivative represented by the general formula (I): wherein R 1 is alkyl, hydroxyalkyl, cycloalkyl, or phenyl which may have alkyl, alkoxy, halogen, hydroxyl, trifluoromethyl, nitro and amino; R 2 is hydrogen atom, alkyl, hydroxyalkyl, cycloalkyl, or phenyl which may have alkyl, alkoxy, halogen, hydroxyl, trifluoromethyl, nitro and amino; X is chlorine, bromine or iodine; and Y is alkylene group having 5 to 12 carbon atoms; an intermediate; and a process for preparing the intermediate. The amide derivative is a useful compound as an intermediate for preparing a diazacycloalkanealkylsulfonamide derivative, which has antiallergic activity and thereby is useful as a medicament for preventing and treating diseases such as bronchial asthma, allergic rhinitis, atopic dermatitis, urticaria, and the like.
Abstract translation:一种制备由通式(I)表示的卤代烷基磺酰胺衍生物的方法:其中R 1为可具有烷基,烷氧基,卤素,羟基,三氟甲基,硝基和氨基的烷基,羟基烷基,环烷基或苯基; R 2是氢原子,可以具有烷基,烷氧基,卤素,羟基,三氟甲基,硝基和氨基的烷基,羟基烷基,环烷基或苯基; X是氯,溴或碘; Y为碳原子数5〜12的亚烷基。 中间人 和中间体的制备方法。 酰胺衍生物是制备具有抗过敏活性的二氮杂环烷烷基磺酰胺衍生物的中间体的有用化合物,因此可用作预防和治疗诸如支气管哮喘,过敏性鼻炎,特应性皮炎,荨麻疹等疾病的药物。
Abstract:
Described is the preparation of fluorooxy-fluorosulfonyl compounds by direct fluorination of β-sultones with elemental fluorine according to the reaction scheme: wherein R₁ and R₂, the same or different from each other, represent fluorine or chlorine or an alkyl radical partially or completely halogenated with fluorine and/or chlorine. The reaction is conducted continuously in the presence of a fluorination catalyst, preferably an alkali-metal fluoride, at temperatures of from -40°C to +100°C and at pressures of from 50 to 800 kPa.
Abstract:
Produce a sulfo-chlorinated hydrocarbon using liquid sulfur dioxide, a chlorinating agent such as chlorine or sulfuryl chloride, and a metal complex catalyst, the catalyst being represented as LnM where L is at least one of an amine, phosphine, chloride or oxide, n is an integer within a range of from 1 to 6, and M is a metal selected from a group consisting of copper (Cu), ruthenium (Ru), iron (Fe), chromium (Cr), lanthanum (La), nickel (Ni), palladium (Pd), rhodium (Rh), rhenium (Re), molybdenum (Mo) and manganese (Mn).
Abstract:
The invention concerns a method for synthesis of hydrogenofluoromethylenesulphonyl radical derivatives, comprising: a) a step which consists in condensing a thiolate (that is a monoalkyl sulphide salt) with a compound having a sp3 hybridized carbon bearing a hydrogen, a fluorine, a heavy halogen selected among chlorine, bromine and iodine and an electron-attracting group selected among fluorine and those whereof the σp is not less than 0.2, advantageously than 0.4; b) a step which consists in oxidizing the compound obtained in step a). The invention is applicable to the synthesis of various compounds having a suphinyl or sulphonyl group.