摘要:
A reagent for carrying out a difluoromethylation reaction of unsaturated compounds and ring-nitrogen-containing aromatic compounds, a zinc difluoro-methanesulfinate, as well as a method for making the reagent and a method for its use are disclosed.
摘要:
The invention relates to aromatic sulfinates and sulfonyl halides, and to the preparation thereof. The halides and the sulfinates are respectively of formulae Ar-Z- (CF2) n-CFRf-SO2Y (I) and [Ar-Z- (CF2) n-CFRf-SO2] m M wherein Z is a sulfide, sulfinyl or sulfonyl group; n is 0 or 1; Rf is F or a perfluoroalkyl group; Ar is an aromatic grouping; Y is Cl, Br or F; M is H, an alkaline metal, an alkaline-earth metal cation, a trivalent or tetravalent metal cation, or an organic cation. The sulfinates can be used for the preparation of sulfonyl halides which can be used for producing sulfonates and sulfonylimidides as salts for an electrolyte.
摘要:
Methods, compounds, pharmaceutical compositions and kits are described for treating or preventing amyloid-related disease. Also described are methods, compounds, pharmaceutical compositions and kits for detecting, diagnosing, monitoring and treating or preventing amyloid-related disease.
摘要:
Disclosed is a process to prepare a sulfinate, which is useful for preparing a synthetic intermediate of an organic compound, especially for a color coupler, characterized by reducing a sulfonyl chloride with a sulfite or a hydrogensulfite in the presence of a hydrogenphosphate.
摘要:
Sulfinsäurederivate wie beispielsweise Zinkdithionit, Natriumdithionit, Zink- oder Natriumhydroximethyl- oder -ethylsulfinat, deren Kondensationsprodukte mit Ammoniak, und Aminoiminomethansulfinsäure werden durch Zumischung von Kaliumcarbonat gegen Zersetzung stabilisiert.
摘要:
L'invention concerne un réactif utile pour la synthèse de dérivés organiques oxysulfurés et fluorés par réaction avec un oxyde de soufre, notamment du bioxyde de soufre, caractérisé par le fait qu'il comprend :
a) un acide fluorocarboxylique de formule Ea - CF 2 - COOH, où Ea représente un atome ou un groupe électroattracteur, au moins partiellement salifié par un cation organique ou minéral, et b) un solvant aprotique polaire ;
et par le fait que la teneur en protons libérables portés par ses divers composants, y compris leurs impuretés, est au plus égale à la moitié de la concentration molaire initiale dudit acide fluorocarboxylique. Ce réactif peut être mis en oeuvre par chauffage pour former des acides sulfiniques ou sulfoniques fluorés.
摘要:
A process allows 4-alkyl(C1-C4)-sulfonyl-1-alkyl-2-chlorobenzenes to be produced with high yields and selectivity. Chlorides of p-alkylbenzene sulfonic acid are selectively chlorinated with gaseous chlorine in the presence of a chlorine carrier, at 50 °C to 100 °C, until a compound having formula (2), in which R1 stands for alkyl(C1-C4) groups, is obtained, this compound is then reduced with sodium hyposulphite or sodium sulphite in an aqueous medium at pH values between 8 and 10, at 40 to 90 °C, until a compound having formula (3), is obtained, and the latter is reacted with alkyl(C1-C4)-chloride in the presence of an acidifier at 80 to 150 °C. Also disclosed are compounds having formula (3), which contain the group -SO2X, in which X stands for a hydrogen or alkaline metal atom, instead of the group -SO2Na.