55 results about "Silver trifluoromethanesulfonate" patented technology

A method of enhanced speciation of both positive and negatives species in an analyte is disclosed. The method can include producing a first analyte solution comprising an analyte composition and an effective amount of silver triflate, and analyzing the first analyte solution with an electrospray ionization mass spectrometer. The method can also include producing a second analyte solution comprising a portion of the analyte composition and an effective amount of a compound of formula I, and analyzing the second analyte solution with an electrospray ionization mass spectrometer. The compound of formula I is [NX+][OH−], where X is a linear, branched, or cyclic C1-C10 alkane; an aryl; a heterocyclic aromatic; or a heterocyclic moiety.

The invention provides a method for synthesizing a quinoline derivative by utilizing arylamine, aromatic aldehyde and ketone, and belongs to the technical field of the synthesis of the quinoline derivative. According to the method for synthesizing a quinoline derivative by utilizing arylamine, aromatic aldehyde and ketone, in the existence of silver trifluoromethanesulfonate and trifluoromethanesulfonic acid, the quinoline derivative is synthesized by virtue of the reaction of an arylamine compound, an aromatic aldehyde compound and ketone compound. A reaction general formula is as shown in the specification. Compared with the prior art, the method is not only applicable to a great amount of functional groups, but also is simple in operation, high in yield, single in product structure, convenient to separate and purify, safe, low in price and small in pollution.

The present invention relates to a silver nanowire and its preparation method and application. The preparation method of the silver nanowires comprises the following steps: dissolving a silver salt in a first solvent to obtain a first mixture, wherein the silver salt is selected from silver trifluoromethanesulfonate, silver diethyldithiocarbamate and succinyl At least one of the imine silver salts, the first solvent is water; the seed crystal, the reducing agent and the dispersing agent are dissolved in the second solvent at 48°C to 72°C to obtain a second mixture, and the crystal seed is selected from citric acid At least one of trisilver or silver tetrafluoroborate, and the second solvent is water; the first mixture and the second mixture are mixed in a dropwise manner, the pH is adjusted to 8-8.5, and the solid-liquid separation is performed to obtain silver nanowires. The above preparation method can obtain silver nanowires with superior bending resistance and longer aspect ratio.

The present invention provides a kind of synthetic method that under the action of monovalent silver and reducing agent, the tryptamine alkyne amide substrate containing indole can generate hydrogenated pyridine spiroindoline ring at room temperature, the general reaction formula is as follows , where R 1 , R 2 , R 3 , R 4 As described in the claims and description. The silver catalyst required for the reaction is one of silver trifluoromethanesulfonate, silver hexafluoroantimonate, silver tetrafluoroborate, and silver bistrifluoromethanesulfonimide. The reducing agent required for the reaction is Hans ester. The medium required for the reaction is: toluene. The implementation of the reaction is stirring at room temperature. The method of the invention has easy-to-obtain raw materials, simple operation, wide application range, good atom economy, green reaction and low price.

The invention provides a method for efficiently synthesizing quinoline. The quinoline is synthesized by phenylamine and olefin ketone with substituents catalyzed by silver trifluoromethanesulfonate, as well as an olefine aldehyde derivative. The method is simple to operate, is applicable to many functional groups, has high yield and a single product, facilitates separation and purification, and is safe, cheap and low in pollution.

The invention belongs to the technical field of organic chemistry and pharmaceutical chemistry, and in particular relates to a method for stereoselective preparation of derivatives of pyrane. The method comprises the following steps of: under the protection of inert gases, adding derivatives of 1-p-tolylthio-2-C-glyoxyl-alpha-D-glucopyranose, derivatives of 1-thiophenyl-2-C- glyoxyl-alpha-D-glucopyranose or derivatives of 1-ethylthio p-tolyl-2-C-glyoxyl-alpha-D-glucopyranose, which serve as reactants, into a reactor, adding alcohol, phenol, trimethylsilyl azide or monosaccharide derivatives, adding a solvent such as methylene chloride to dissolve the raw materials, and performing the reaction at the reaction temperature of between 40 DEG C below zero and room temperature in the presence of a catalyst which is N-iodosuccinimide, or N-bromosuccinimide, or copper bromide and tetrabutylammonium bromide, or iodine, bromine simple substance or N-iodosuccinimide and trimethylsilyl triflate, or trifluoromethanesulfonic silver, or paratoluenesulfonic acid or trifluoromethanesulfonic acid to obtain the derivatives of pyrane. The method has the advantages of simple operation, high selectivity, low cost, light environmental pollution and the like.