107 results about "Methyl sulfones" patented technology

The invention discloses a mesosulfuron-methyl synthetic method. The mesosulfuron-methyl synthetic method is characterized in that mesosulfuron-methyl is prepared from raw materials such as paratoluic acid by adopting the seven steps of chlorosulfonation-ammonolysis, oxidation, dehydration, reduction, alcoholysis, methyl sulfone chloride acylation and condensation. The mesosulfuron-methyl synthetic method provided by the invention has the advantages of being low in cost of the raw materials, easy in availability of the raw materials, simple in operation and mild in conditions, having low requirements on equipment, high yield and strong practicability and being suitable for industrial production.

The invention discloses a compound preparation method, which comprises the following steps: a) a compound disclosed in formula I and 4-chlorine-6-iodine-quinazoline are in backflow reaction in isopropanol; b) kieselguhr, stannous chloride, trifluoroacetic acid, H2PdCl4 and polyvinylpyrrolidone are mixed in water and heated to 100-150 DEG C, and a Pd catalyst is obtained after reaction; c) the products obtained in step a), the Pd catalyst, 5-formyl furanboronic acid and K2CO3 are mixed to be reacted in a first organic solvent; and d) reaction products obtained in step c), organic base and 2-(methyl sulfone) ethylamine hydrochloride are mixed in a second organic solvent, and lapatinib basic groups or analogues thereof are obtained after reaction. The heterogeneous Pd catalyst is adopted, and because the heterogeneous Pd catalyst is easy to recycle, the preparation method provided by the invention protects the environment at the time of saving raw materials. Formula (I) is disclosed in the specification.

The invention discloses a preparation method of 2-nitro-4-methyl sulfone benzoic acid. The preparation method comprises the following steps: preparing 2-nitro-4-methyl sulfone toluene in a concentrated sulfuric acid medium by using 4-methyl sulfone toluene as an initial material and nitric acid as a nitrating agent, directly adding water to dilute reaction liquid without separating the nitrating product of 2-nitro-4-methyl sulfone toluene, and dropping an oxidizing agent prepared by mixing hydrogen peroxide and concentrated sulfuric acid in the presence of a copper sulfate catalyst to prepare 2-nitro-4-methyl sulfone benzoic acid. The preparation method has the beneficial effects that 2-nitro-4-methyl sulfone benzoic acid is prepared by a one-pot process, so that the separation process of an intermediate is saved, the production process is simplified, the production cost is reduced, the yield is high, and the use amount of sulfuric acid and hydrogen peroxide is lowered. The preparation method is efficient, energy-saving, environment-friendly and more suitable for industrial production.

The invention relates to a preparation method of a florfenicol oxazoline intermediate, and belongs to the technical field of drug preparations. The preparation method of the florfenicol oxazoline intermediate as shown in a formula (I) comprises the following steps: using D-p-methyl sulfone phenyl ethyl serinate as a raw material, adding a reducing agent into an alcohol proton solution of organic alkali in one time, performing a reducing reaction to generate ADS (amino diol sulfone), and controlling a reaction endpoint by HPLC (high performance liquid chromatography); after the reducing reaction, concentrating a solvent; adding glycerin for destroying the excess reducing agent, adjusting the pH value to be 6-7 by acid, dropwise adding dichloroacetonitrile, heating to 50 DEG C, performing a cyclization reaction, and controlling a reaction endpoint by the HPLC; after the cyclization reaction, dropwise adding an ethanol water solution, conducting a centrifugal process, washing, and drying to obtain the florfenicol hydroxyl oxazoline intermediate as shown in the formula (I). According to the method, the reducing agent can be added in one time; meanwhile, the hydrogen release speed in the preparation process is very slow, so that the safety is greatly improved.

The invention relates to a cooking auxiliary agent for papermaking and pulping, belongs to the field of papermaking, and aims to solve the problems that the existing cooking auxiliary agent is high in toxicity and severe in environmental pollution. The cooking auxiliary agent for papermaking and pulping comprises the following components in percentage by weight: 8-12% of primary alcobol ethoxylate, 10-20% of linear alkylbenzene sulfonates, 3-8% of alkyl sulfonate sodium acetate, 3-8% of alkyl phenyl polyoxyethylene ether, 2-5% of sodium nonylphenol polyoxyethylene ether sulfonate, 1-3% of methyl sulfone, 2-5% of carboxymethyl cellulose, 0.5-1.2% of oleamide, 0.1-0.5% of sodium pyrophosphate and the balance of deionized water. The cooking auxiliary agent is mainly applicable to the papermaking field, can reduce environmental pollution, improve the screened pulp yield and reduce Kappa number.

The present invention relates to compositions comprising an effective amount of diiodomethyl-p-tolylsulfone, wherein diiodomethyl-p-tolylsulfone is present as a dispersion of particles in a liquid solvent. In another embodiment, the present invention is directed to a composition wherein a retained activity of at least about 30% is obtained when said diiodomethyl-p-tolylsulfone is present as a dispersion of particles in a liquid solvent. In another embodiment, the present invention also relates to a composition wherein greater than 70% of said diiodomethyl-p-tolylsulfone remains in the liquid solvent in the form of a particle dispersion.

The invention discloses a two-in-one filtering device comprising a washing kettle. The lower end of the washing kettle is fixedly connected with a plurality of support bases arranged in equal axial spacing. The lower end of the washing kettle is provided with a liquid outlet, and the inner bottom of the washing kettle is fixedly connected with support rods arranged in equal axial spacing; the upper ends of a plurality of support rods are jointly fixedly connected with a fixed plate, and the fixed plate is provided with a washing dehydration mechanism; the inner wall of the washing kettle is fixedly connected with two oppositely arranged heating plates, the inner wall of the washing kettle is fixedly connected with a temperature sensor, and the side wall of the washing kettle is fixedly connected with a temperature displayer. The structure is reasonable in design. Due to completely closed filtration and leak-free production, the industrial production method of p-methyl sulfone toluene can avoid harm to a human body and environment, no any environmental pollution exists, continuous production can be achieved and the production efficiency is improved, so that the production needs of enterprises can be met.

The invention discloses a method for synthesizing (1R, 2R)-1-p-methyl sulfone phenyl-2-amino-1,3-propanediol, which belongs to the technical field of chemical medicines. The method comprises the following steps: 1. carrying out condensation on p-methylsulphonyl benzaldehyde (II) and primary amine so as to obtain a compound (III); 2. in the presence of a catalyst, carrying out acridine reaction on the compound (III) and ethyl diazoacetate so as to obtain a compound (IV); 3. carrying out reduction on the compound (IV) so as to obtain a compound (V); and 4. in the presence of an acid, carrying out ring-opening reaction and de-protection reaction on the compound (V) by a one-pot method so as to obtain the (1R, 2R)-1-p-methyl sulfone phenyl-2-amino-1, 3-propanediol. The method provided by the invention has the advantages of novel design, simple and short route, mild conditions, good enantioselectivity, high yield, and good industrialized production prospect, and is simple and convenient in operation.

The invention provides a manufacturing method of antibacterial fiber filament. The manufacturing method comprises the following steps: mixing p-[(diiodomethyl)sulphonyl]toluene and plastic master batch so as to combine the plastic master batch with the p-[(diiodomethyl)sulphonyl]toluene, and then melting and spinning the mixture so as to obtain the antibacterial fiber filaments.

The embodiment of the invention discloses a composition, a preparation method and an application of the composition in preparation of medicines, health-care products and foods for treating pet joint diseases. The composition comprises glucosamine, chondroitin sulfate, dimethyl sulfone, green mussels, haematococcus pluvialis, frankincense, curcumin, coix seeds and rhizoma smilacis glabrae. The composition fundamentally inhibits and relieves arthritis from the aspects of eliminating free radicals, neutralizing free radicals, inhibiting proinflammatory cell generation and the like, supplements necessary nutrient substances for cartilage cell growth, promotes synthesis of new cartilage, and achieves the effect of treating both symptoms and root causes in combination with traditional Chinese medicine components for rapid detumescence and pain relief.

The invention discloses a fungicidal composition containing 2-methyl sulfone-5-(2,4-dichlorophenyl)-1,2,3-oxadiazole and fluopicolide and application of the fungicidal composition. The active ingredients comprise 2-methyl sulfone-5-(2,4-dichlorophenyl)-1,2,3-oxadiazole and fluopicolide, the compound weight ratio of 2-methyl sulfone-5-(2,4-dichlorophenyl)-1,2,3-oxadiazole to fluopicolide is 1:30-30:1, and preferred weight ratio is 1:20-10:1. The fungicidal composition can be prepared into emulsifiable concentrate, wettable powder, oil-dispersible suspending agent, suspending agent, water dispersible granule, aqueous emulsion, microemulsion and granules. The fungicidal composition is reasonable in composition and good in fungicidal effect, and can achieve an obvious synergistic effect within the proportion range. The fungicidal composition has remarkable control effects on potato late blight and other various crop diseases.

The invention relates to a new 2-indolinone compound and a preparation method and the usage to prepare the compounds. The general formula of the new derivatives of indolinone provided by the invention is the formula above, when in preparation, the 3-position and the 5-position of 2-indolinone are respectively introduced by amide and a carboxamide methyl sulfonyl structure to get the new derivatives. The 2-indolinone compounds of the invention have good activity of inhibition of tumor cell growth.

The invention discloses a preparation method of p-methyl sulfone phenyl ethyl serinate and belongs to the technical field of a synthetic technology of veterinary drugs and pharmaceutical intermediates. According to the technical scheme, the preparation method is characterized in that p-methyl sulfone phenyl serine copper is dissolved in a sodium hydroxide solution, an Na2S solution is added to precipitate Cu<2+>, activated carbon is added to adsorb excess S<2->, the mixture is mechanically agitated and subjected to suction filtration, hydrochloric acid is added to a filtrate to regulate pH to be 3-7, and the mixture is subjected to condensation crystallization and suction filtration to obtain p-methyl sulfone phenyl serine; the p-methyl sulfone phenyl serine is dissolved in absolute ethyl alcohol, concentrated sulfuric acid is added, the mixture is subjected to reflux for 4 h, cooling crystallization and suction filtration, a filter cake is dissolved in water, a saturated Na2CO3 solution is added to regulate pH to be neutral, and the p-methyl sulfone phenyl ethyl serinate is obtained after suction filtration. The preparation method has the advantages as follows: the Na2S solution is added in an alkaline environment to remove Cu ions, the excess S<2-> is removed through activated carbon adsorption, and production of toxic and irritant gas H2S through combination of S ions and H ions is avoided, so that the problem of environmental pollution is solved effectively.