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34 results about "Deuterated chloroform" patented technology
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Deuterated chloroform (CDCl₃), also known as chloroform-d, is an isotopologue of chloroform (CHCl₃) in which the hydrogen atom ("H") is replaced with a deuterium (heavy hydrogen) isotope ("D"). Deuterated chloroform is a common solvent used in NMR spectroscopy. Most compounds soluble in dichloromethane are soluble in chloroform, but chloroform is much cheaper than deuterated DCM. The properties of CDCl₃ are virtually identical to those of regular chloroform.
Single-core dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline serving as ligand as well as preparation method and application of single-core dysprosium complex
ActiveCN107129509AEasy to prepareLow costGroup 3/13 organic compounds without C-metal linkagesOrganic/organic-metallic materials magnetismDeuterated chloroform8-Hydroxyquinoline
The invention discloses a single-core dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline serving as a ligand as well as a preparation method and application of the single-core dysprosium complex. The complex has a chemical formula of [Dy(L)3(H2O)], wherein L is 2-methyl-5,7-dibromo-8-hydroxyquinoline with hydrogen atoms of hydroxyl being removed and is charged with a unit of negative charge. The complex belongs to a monoclinic system with C2 / c space groups. The preparation method of the complex disclosed by the invention comprises the following steps: taking Dy(NO3)3.6H2O and 2-methyl-5,7-dibromo-8-hydroxyquinoline, dissolving with a mixed solvent, regulating the pH value of the obtained solution to be 6.5-7.8, reacting the obtained mixed solution under heating conditions, thereby obtaining the product, wherein the mixed solvent refers to a combination of chloroform or deuterated chloroform and water. The complex provided by the invention is simple in preparation method, low in cost and high in repeatability, presents a slow relaxation magnetic behavior at low temperature and can be used for preparing magnetic materials.
Owner:GUANGXI NORMAL UNIV
Deuterated diazepam and preparation method thereof
InactiveCN103204819ASimple reaction conditionsEasy to operateOrganic chemistryBenzodiazepineDeuterated chloroform
The invention discloses deuterated diazepam and a preparation method thereof. The preparation method of deuterated diazepam comprises the following steps of: (1) mixing 7-chlorine-1-methyl-5-phenyl-1,3-dihydro-1,4-benzodiazepine-2-ketone and N,N-dimethyl formamide, and stirring; (2) adding potassium carbonate and deuterated chloroform, heating the mixture to more than 40 DEG C and stirring; and (3) carrying out separation to obtain the deuterated diazepam. The preparation method provided by the invention is short, simple and convenient to operate, low in cost and easy to purify. The commercially available non-deuterated diazepam uses a small amount of deuterated reagents as deuterium sources in a non-deuterated solvent atmosphere, so that deuterated diazepam is obtained in a relatively short period of time, and through simple column chromatography purification, a purified product is purified. The deuterated diazepam standard product prepared according to the invention is high in purity and stable in chemical property; and the preparation of the standard product for analysis is convenient. The preparation method provided by the invention can be used for producing deuterated internal standard substance used for analyzing and detecting diazepam.
Owner:INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
Deuterated alprazolam and preparation method thereof
InactiveCN103204856ASimple reaction conditionsEasy to purifyOrganic chemistryDeuterated chloroformPotassium carbonate
The invention discloses deuterated alprazolam and a preparation method thereof. The preparation method of deuterated alprazolam comprises the following steps of: (1) mixing commercially available non-deuterated alprazolam and N,N-dimethyl formamide, and stirring; (2) adding potassium carbonate and deuterated chloroform, heating the mixture to more than 40 DEG C and stirring; and (3) carrying out separation to obtain the deuterated alprazolam. The preparation method provided by the invention is short, simple and convenient to operate, low in cost and easy to purify. The commercially available non-deuterated alprazolam uses a small amount of deuterated reagents as deuterium sources in a non-deuterated solvent atmosphere, so that deuterated alprazolam is obtained in a relatively short period of time, and through simple column chromatography purification, a purified product is purified. The deuterated alprazolam standard product prepared according to the invention is high in purity and stable in chemical property; and the preparation of the standard product for analysis is convenient. The preparation method provided by the invention can be used for producing deuterated internal standard substance used for analyzing and detecting alprazolam.
Owner:INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
Method for preparing deuterated chloroform by using hexachloroacetone as intermediate
InactiveCN103408413ASolve processing problemsAvoid emissionsOrganic compound preparationCarbonyl compound preparationPtru catalystDeuterated chloroform
The invention provides a method for preparing deuterated chloroform by using hexachloroacetone as an intermediate. The method comprises the following steps: step 1, producing hexachloroacetone by monochloroacetone and / or polychlorinated acetone raw material liquid, and comprising the steps of raw material liquid pre-treatment, chlorination catalytic reaction and reaction product purification; step 2, producing deuterated chloroform by taking hexachloroacetone as raw material, and comprising the steps of hydrolytic catalytic reaction and reaction product purification. The method solves the problem of the disposing of waste material produced during the production of monochloroacetone, trichloroacetone and the like, and is in favor of relieving the environment burden; common cheap chemical is used as catalytic agent, the side reaction is less, the reaction product is easy to separate, and the content of the produced pollutant is greatly lowered. Through the utilization of the polarization and weakening effects of connecting bond of the carbonyl carbon of the hexachloroacetone and trichloromethyl, the carbonyl carbon of the hexachloroacetone and trichloromethyl are hydrolyzed in an alkalescence condition to produce deuterated chloroform, and the reaction product is CO2 that can be discharged into air directly. The method has important social benefits and economic benefits.
Owner:QINGDAO TENGLONG WEIBO TECH
Sulfur-modified chloroprene rubber, molding thereof, and production method therefore
ActiveUS20130245202A1Reduced exothermicityReduce exothermicityV-beltsNon-rotating vibration suppressionCarbon numberTetramethylthiuram disulfide
Provided are a sulfur-modified chloroprene rubber with reduced exothermicity, a molding thereof, and a production method therefor.A sulfur-modified chloroprene rubber modified at the polymer terminals with at least one compound selected from tetramethylthiuram disulfide, tetraalkylthiuram disulfides with alkyl groups having a carbon number of 2 to 7 and dialkyldithiocarbamic acid salts with alkyl groups having a carbon number of 1 to 7, wherein there are peak tops at 3.55 to 3.61 ppm and at 3.41 to 3.47 ppm in 1H-NMR spectrum, as determined in deuterochloroform solvent, wherein the ratio (A / B) of the peak area (A) at 3.55 to 3.61 ppm to the peak area (B) at 4.2 to 6.5 ppm is 0.05 / 100 to 0.50 / 100, and the extract with ethanol / toluene azeotropic mixture, as specified by JIS K 6229, is 3.0 to 9.0 mass %.
Owner:DENKA CO LTD
Deuterated estazolam and preparation method thereof
InactiveCN103864798AEasy to prepareSimple and fast operationOrganic chemistryDeuterated chloroformEstazolam
The invention discloses deuterated estazolam and a preparation method thereof. The preparation method comprises following steps of (1) adding 6-phenyl-8-chlorine-4H-[1,2,4] triazole-[4,3-a][1,4] benzo-diazepine into dimethyl sulfoxide or N,N-dimethylformamide, mixing and stirring; (2) adding a catalyst cesium carbonate or potassium carbonate as well as deuterated chloroform, stirring and heating up to over 40DEG C; and (3) separating so as to obtain deuterated estazolam. The preparation method is concise, is simple and convenient to operate, has low cost, and is easy for purification. Commercially available non-deuterated estazolam can be converted into deuterated estazolam by a little deuterated reagent used as a deuterium source in the non-deuterated solvent atmosphere in shorter time, and a pure product can be obtained through simple purification by column chromatography. The standard deuterated estazolam prepared by the method has high purity and stable chemical property, and is convenient for preparing standard substances for analysis. The preparation method can be used for producing, analyzing and detecting the deuterated internal standard substance used by estazolam.
Owner:INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
Method for preparing deuterochloroform
ActiveCN109096044AReduce dosageHigh purityHalogenated hydrocarbon preparationIsotope introduction to acyclic/carbocyclic compoundsEconomic benefitsDeuterated chloroform
The invention provides a method for preparing deuterochloroform. The method comprises the following steps: (1) enabling sodium trichloroacetate, calcium oxide and heavy water to react at 80-95 DEG C,and terminating the reaction after the heavy water completely react so as to obtain a crude product; (2) drying and separating the crude product obtained in the step (1), thereby obtaining deuterochloroform. As reagents are cheap chemicals which are common and easy to use, the method is small in side reaction, easy in reaction product separation, simple in process, high in yield, low in cost and great in social and economic benefit.
Owner:CHENGDU BIOBEL BIOTECHNOLOGY CO LTD
Sulfur modified chloroprene rubber and method for producing same, and molded body
Provided are: a sulfur modified chloroprene rubber that has excellent adhesiveness to core wires and reinforced fiber materials; a method for producing the same; and a molded body. A polymerization step of blending 0.1 to 2.0 parts by mass of sulfur into 100 parts by mass of a 2-chloro-1,3-butadiene and emulsion polymerizing the mixture until the monomer conversion rate is within the range of 60 to 90%, and a plasticization step of adding an aqueous medium dispersion containing 10 to 70 mass% of a tetramethylthiuram disulfide into the reaction liquid after polymerization and modifying the polymer end are performed to obtain a sulfur modified chloroprene rubber for which the 1H-NMR spectrum measured in a deuterated chloroform solvent shows peaks at 3.55 to 3.61 ppm and 3.41 to 3.47 ppm, and the ratio (A / B) of peak area (A) at 3.55 to 3.61 ppm to peak area (B); at 4.2 to 6.5 ppm is 0.05 / 100 to 0.70 / 100.
Owner:DENKA CO LTD
Polycarbonate polyols, and preparation method and applications thereof
ActiveCN107245142ATransparentHigh mechanical strengthPolyurea/polyurethane coatingsPolyolPrimary standard
The invention discloses polycarbonate polyols, and a preparation method and applications thereof. The polycarbonate polyols comprise repetitive units disclosed as Formula (A) and terminal groups, wherein R is C3-C15 bivalent aliphatic hydrocarbons; and 92-99.9% of the terminal groups are hydroxyls. In 1H-NMR of the polycarbonate polyols, when deuterated chloroform is used as a solvent and primary standard substance, the chemical shift of the deuterated chloroform signal is set at 7.26ppm; and when the 3.90-4.45ppm signal integral value is set at 1000, the 3.70-3.85ppm signal integral quantity is 0.1-10.
Owner:ETERNAL CHEM (CHINA) CO LTD
Sulfur modified chloroprene rubber and method for producing same, and molded body
InactiveUS20140350190A1Improve adhesionV-beltsDriving beltsTetramethylthiuram disulfidePolymer science
Provided are a sulfur-modified chloroprene rubber superior in adhesiveness to cable core and fibrous reinforcement material, a method for producing the same, and a molded body prepared from the same. A sulfur-modified chloroprene rubber is prepared in a polymerization step of mixing 100 parts by mass of 2-chloro-1,3-butadiene and 0.1 to 2.0 parts by mass of sulfur and emulsion-polymerizing the mixture to a monomer conversion rate in the range of 60 to 90% and in a plasticizing step of modifying the terminal of the polymer by adding an aqueous medium dispersion containing tetramethylthiuram disulfide in an amount of 10 to 70 mass % to the reaction solution after polymerization. The 1H-NMR spectrum of the sulfur-modified chloroprene rubber, as determined in deuterochloroform solvent, has two peak tops at 3.55 to 3.61 ppm and at 3.41 to 3.47 ppm, and the ratio (A / B) of peak area (A) at 3.55 to 3.61 ppm to peak area (B) at 4.2 to 6.5 ppm is 0.05 / 100 to 0.70 / 100.
Owner:DENKA CO LTD
H-NMR method for identifying beef, pork or duck meat doped in mutton
ActiveCN111337528AExperiment operation is simpleImprove accuracyPreparing sample for investigationAnalysis using nuclear magnetic resonanceNMR - Nuclear magnetic resonanceOrganic solvent
The invention discloses an H-NMR method for identifying beef, pork or duck meat doped in mutton. The method comprises the following steps: weighing a proper sample by a nuclear magnetic resonance hydrogen spectrum method of pork or duck meat, extracting by adopting an organic solvent, adding a proper amount of ultrapure water, carrying out vortex centrifugation, carrying out nitrogen blowing on anupper organic phase, dissolving a small amount of treated sample by using TMS-containing deuterated chloroform, and analyzing by adopting a 400MHz nuclear magnetic resonance spectrometer; and judgingwhether the sample mutton is true mutton or not according to the obtained nuclear magnetic resonance hydrogen spectrum fingerprint. The identification method disclosed by the invention is simple, efficient in detection, high in result accuracy and good in reproducibility, and in addition, the identification method has reference significance for researching the authenticity of mutton doped with other meat or other meat and meat products.
Owner:JIANGSU SINOGRAPHY TESTING
Polycarbonate-based resin composition for extrusion molding using sizing die and molded product
ActiveUS7326467B2Excellent gas barrier performanceGood weather resistanceSynthetic resin layered productsCeramic shaping apparatusPolymer scienceDeuterated chloroform
A polycarbonate-based resin composition for extrusion molding using a siring die, and a molded product produced by extrusion-molding the resin composition using a sizing die, The polycarbonate-based resin composition comprises, as a main component, a polycarbonate having a viscosity-average molecular weight of 17000 to 27000 and containing main repeating units represented by the following formula (A):wherein an amount of proton (Pa) and an amount of proton (Pb) per 1 g of the polycarbonate which are calculated from respective integral values of a signal (a) detected at δ=7.96 to 8.02 ppm and a signal (b) detected at δ=8.11 to 8.17 ppm in 1H-NMR spectra thereof as measured in a deuterated chloroform solvent, satisfy the following formula (1):4<{(Pa)+(Pb)}<26 (1)wherein a unit of each of (Pa) and (Pb) is μmol / g. The above polycarbonate resin composition exhibits good mechanical properties and a good moldability.
Owner:MITSUBISHI ENG PLASTICS CORP
Deuterated diazepam and preparation method thereof
InactiveCN103204819BSimple reaction conditionsEasy to operateOrganic chemistryBenzodiazepineDeuterated chloroform
The invention discloses deuterated diazepam and a preparation method thereof. The preparation method of deuterated diazepam comprises the following steps of: (1) mixing 7-chlorine-1-methyl-5-phenyl-1,3-dihydro-1,4-benzodiazepine-2-ketone and N,N-dimethyl formamide, and stirring; (2) adding potassium carbonate and deuterated chloroform, heating the mixture to more than 40 DEG C and stirring; and (3) carrying out separation to obtain the deuterated diazepam. The preparation method provided by the invention is short, simple and convenient to operate, low in cost and easy to purify. The commercially available non-deuterated diazepam uses a small amount of deuterated reagents as deuterium sources in a non-deuterated solvent atmosphere, so that deuterated diazepam is obtained in a relatively short period of time, and through simple column chromatography purification, a purified product is purified. The deuterated diazepam standard product prepared according to the invention is high in purity and stable in chemical property; and the preparation of the standard product for analysis is convenient. The preparation method provided by the invention can be used for producing deuterated internal standard substance used for analyzing and detecting diazepam.
Owner:INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
Method for identifying and quantitatively analyzing adulteration in Chinese prickly ash by using nuclear magnetic resonance hydrogen spectrum
PendingCN114324439ARapid qualitative identificationQuantitative Analysis of Rapid Oil Blending AmountAnalysis using nuclear magnetic resonanceZanthoxylum bungeanumNMR - Nuclear magnetic resonance
The invention relates to the technical field of food detection, in particular to a method for identifying and quantitatively analyzing adulteration in zanthoxylum bungeanum by using nuclear magnetic resonance hydrogen spectrum.The method comprises the steps that after a zanthoxylum bungeanum sample is subjected to deuterated chloroform extraction, a hydrogen spectrum signal is tested; the obtained hydrogen spectrum data is subjected to peak displacement correction, data binning and normalization processing, a random forest model is established, and a test standard for judging oil doping or pepper doping is formed. And according to a random forest model discrimination result, respectively finding oil-doped and Shandong pepper-doped difference marker signals. Linear fitting is carried out on the pepper difference marker signals of different oil doping amounts or pepper doping amounts and the oil doping amounts or the pepper doping amounts to obtain the relation between the peak area and the oil doping amounts or the pepper doping amounts, and the relation can be used for quantitatively analyzing the oil doping amounts or the pepper doping amounts in the peppers; the problems that an existing sensory evaluation method adopted for pepper adulteration identification has high professional requirements for reviews, the evaluation result is easily interfered by external factors, and adulteration cannot be accurately quantified are solved.
Owner:ANHUI AGRICULTURAL UNIVERSITY +1
Nuclear magnetic resonance spectrum analysis method of biodegradable plastic
PendingCN112782207AQuick checkAnalysis using nuclear magnetic resonanceChlorobenzeneNMR - Nuclear magnetic resonance
The invention belongs to the technical field of detection and analysis, and particularly discloses a nuclear magnetic resonance spectrum analysis method for biodegradable plastics, which comprises the following steps: S1, extracting the biodegradable plastics by trichloromethane to obtain an extraction solution; S2, evaporating the extraction solution to dryness to obtain an extract for later use; S3, adding deuterated chloroform into the extract in the step S2, and dissolving to obtain a solute; and S4, detecting the dissolved matter in the step S3 by a nuclear magnetic resonance spectrum. The method at least has one of the following beneficial effects: trichloromethane is adopted to separate and extract the biodegradable plastic product, a nuclear magnetic resonance (NMR) spectrum method is adopted to qualitatively and quantitatively analyze the extract, and 1, 2, 4, 5-tetrachlorobenzene is taken as a quantitative internal standard to calculate the content of the degradable polymer in the to-be-detected sample. Therefore, rapid detection of the degradable components in the biodegradable product is realized.
Owner:海南省产品质量监督检验所
Deuterated estazolam and preparation method thereof
InactiveCN103864798BEasy to prepareSimple and fast operationOrganic chemistryDeuterated chloroformEstazolam
The invention discloses deuterated estazolam and a preparation method thereof. The preparation method comprises following steps of (1) adding 6-phenyl-8-chlorine-4H-[1,2,4] triazole-[4,3-a][1,4] benzo-diazepine into dimethyl sulfoxide or N,N-dimethylformamide, mixing and stirring; (2) adding a catalyst cesium carbonate or potassium carbonate as well as deuterated chloroform, stirring and heating up to over 40DEG C; and (3) separating so as to obtain deuterated estazolam. The preparation method is concise, is simple and convenient to operate, has low cost, and is easy for purification. Commercially available non-deuterated estazolam can be converted into deuterated estazolam by a little deuterated reagent used as a deuterium source in the non-deuterated solvent atmosphere in shorter time, and a pure product can be obtained through simple purification by column chromatography. The standard deuterated estazolam prepared by the method has high purity and stable chemical property, and is convenient for preparing standard substances for analysis. The preparation method can be used for producing, analyzing and detecting the deuterated internal standard substance used by estazolam.
Owner:INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
Deuterated alprazolam and preparation method thereof
InactiveCN103204856BSimple reaction conditionsEasy to purifyOrganic chemistryDeuterated chloroformPotassium carbonate
The invention discloses deuterated alprazolam and a preparation method thereof. The preparation method of deuterated alprazolam comprises the following steps of: (1) mixing commercially available non-deuterated alprazolam and N,N-dimethyl formamide, and stirring; (2) adding potassium carbonate and deuterated chloroform, heating the mixture to more than 40 DEG C and stirring; and (3) carrying out separation to obtain the deuterated alprazolam. The preparation method provided by the invention is short, simple and convenient to operate, low in cost and easy to purify. The commercially available non-deuterated alprazolam uses a small amount of deuterated reagents as deuterium sources in a non-deuterated solvent atmosphere, so that deuterated alprazolam is obtained in a relatively short period of time, and through simple column chromatography purification, a purified product is purified. The deuterated alprazolam standard product prepared according to the invention is high in purity and stable in chemical property; and the preparation of the standard product for analysis is convenient. The preparation method provided by the invention can be used for producing deuterated internal standard substance used for analyzing and detecting alprazolam.
Owner:INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
Sulfur-modified chloroprene rubber, molding thereof, and production method therefore
ActiveUS9328175B2Reduced exothermicityReduce exothermicityV-beltsNon-rotating vibration suppressionCarbon numberPolymer science
Provided are a sulfur-modified chloroprene rubber with reduced exothermicity, a molding thereof, and a production method therefor.A sulfur-modified chloroprene rubber modified at the polymer terminals with at least one compound selected from tetramethylthiuram disulfide, tetraalkylthiuram disulfides with alkyl groups having a carbon number of 2 to 7 anddialkyldithiocarbamic acid salts with alkyl groups having a carbon number of 1 to 7, wherein there are peak tops at 3.55 to 3.61 ppm and at 3.41 to 3.47 ppm in 1H-NMR spectrum, as determined in deuterochloroform solvent, wherein the ratio (A / B) of the peak area (A) at 3.55 to 3.61 ppm to the peak area (B) at 4.2 to 6.5 ppm is 0.05 / 100 to 0.50 / 100, and the extract with ethanol / toluene azeotropic mixture, as specified by JIS K 6229, is 3.0 to 9.0 mass %.
Owner:DENKA CO LTD
A kind of preparation method of deuterated chloroform
ActiveCN109096044BReduce dosageHigh purityHalogenated hydrocarbon preparationIsotope introduction to acyclic/carbocyclic compoundsSodium chloroacetateBiochemical engineering
The invention provides a kind of preparation method of deuterated chloroform, and it comprises the following steps: (1) get sodium trichloroacetate, calcium oxide, heavy water, react at 80~95 ℃, finish reaction to obtain crude product after heavy water reaction is complete; 2) Take the crude product obtained in step (1), dry and separate to obtain deuterated chloroform. The invention uses commonly used cheap chemicals as reagents, has few side reactions, easy separation of reaction products, simple process, high yield and low cost, and has great social and economic benefits.
Owner:CHENGDU BIOBEL BIOTECHNOLOGY CO LTD
Method for detecting content of polycyclic aromatic hydrocarbon in resin material
The invention relates to a method for detecting the content of polycyclic aromatic hydrocarbon in a resin material, and belongs to the field of testing of raw materials for tire production. The method comprises the following steps of: 1) performing sample treatment, specifically, dissolving hydrocarbon resin in an alkane solvent, quantitatively transferring an alkane solution into an SPE column, performing eluting with alkane, and collecting a purified part; 2) dissolving dried residues with deuterated chloroform, then carrying out nuclear magnetic resonance test, and carrying out a deuterated chloroform blank experiment. and 3) carrying out integration on nuclear magnetic hydrogen spectra and calculating the HBay content according to a formula. The method has the advantages of high accuracy and rapidness, and better repeatability and reproducibility. The method can monitor the content of hydrocarbon resin polycyclic aromatic hydrocarbon HBay in raw materials for tires, so that the purpose of monitoring the content of the polycyclic aromatic hydrocarbon HBay in the tires from the production source is achieved, and the generation of environment-unfriendly tires is prevented.
Owner:TRIANGLE TIRE
Method for detecting overheating treatment of vegetable oil, and use of method
InactiveCN107014846AEat with confidenceAnalysis using nuclear magnetic resonanceGutter oilNMR - Nuclear magnetic resonance
The invention relates to a method for detecting overheating treatment of vegetable oil, and use of the method in the field of edible oil. The method is specifically characterized by comprising the steps of taking 100mu L of an oil sample, adding 400mu L of deuterated chloroform into the oil sample, taking tetramethylsilane (TMS) as internal standard, wherein d is equal to 0, testing 1 <1>H-nuclear magnetic resonance (1H-NMR) spectrum, and taking an aldehyde-group hydrogen characteristic signal (the characteristics of which are as shown in E and F in figure 1) as the proof of the detected vegetable oil being subjected to the overheating treatment, wherein the signal appears when delta H in the 1H-NMR spectrum is equal to 9.0-10.0. After the method is adopted, gutter oil can be simply and rapidly detected.
Owner:SHENYANG PHARMA UNIVERSITY
Resin compositions
A resin composition, a shaped article, a fiber, a film and a sheet. The resin composition includes two or more kinds of polyolefin resins (A), and 0.05 to 10 mass % of an α-olefin (co)polymer (B) satisfying requirements (b-1) to (b-3): (b-1) A methyl group index is 40 to 60%. The methyl group index is a ratio of an integral of a peak observed in a range of 0.50 to 1.15 ppm to an integral of peaks observed in a range of 0.50 to 2.20 ppm in a 1H-NMR spectrum of a solution of the (co)polymer (B) in deuterated chloroform, positions of the peaks being calculated relative to a solvent peak at 7.24 ppm assigned to CHCl3 in deuterated chloroform as a reference. (b-2) A weight average molecular weight determined by GPC is 1,500 to 20,000. (b-3) No melting point is observed from −100 to 150° C. in DSC.
Owner:MITSUI CHEM INC
Mononuclear dysprosium complex based on 2-methyl-5,7-dibromo-8-hydroxyquinoline as a ligand and its preparation method and application
ActiveCN107129509BEasy to prepareLow costGroup 3/13 organic compounds without C-metal linkagesOrganic/organic-metallic materials magnetismDeuterated chloroformMethyl group
Owner:GUANGXI NORMAL UNIV
A kind of polycarbonate polyol and its preparation method and application
ActiveCN107245142BImprove mechanical propertiesHigh transparencyPolyurea/polyurethane coatingsPolyolPrimary standard
The invention discloses polycarbonate polyols, and a preparation method and applications thereof. The polycarbonate polyols comprise repetitive units disclosed as Formula (A) and terminal groups, wherein R is C3-C15 bivalent aliphatic hydrocarbons; and 92-99.9% of the terminal groups are hydroxyls. In 1H-NMR of the polycarbonate polyols, when deuterated chloroform is used as a solvent and primary standard substance, the chemical shift of the deuterated chloroform signal is set at 7.26ppm; and when the 3.90-4.45ppm signal integral value is set at 1000, the 3.70-3.85ppm signal integral quantity is 0.1-10.
Owner:ETERNAL CHEM (CHINA) CO LTD
Deuterated triazolam and preparation method thereof
InactiveCN103880847BSimple reaction conditionsEasy to operateOrganic chemistryN dimethylformamideDeuterated chloroform
Owner:INST OF FORENSIC SCI OF MIN OF PUBLIC SECURITY
Polymer type lyotropic liquid crystal material, preparation method thereof and application thereof in chiral drug resolution
ActiveCN111471467AThe synthesis method is simpleShort routeLiquid crystal compositionsAnalysis using nuclear magnetic resonancePropanoic acidDipeptide
The invention discloses a polymer type lyotropic liquid crystal material as well as a preparation method thereof and application thereof in chiral drug resolution. Firstly, pseudo-dipeptide polyisocyanide adopting chiral naphthylethylamine as a side chain is synthesized, and then a low-concentration polymer lyotropic liquid crystal material is successfully assembled in deuterated chloroform. Afteran aryl propionic acid anti-inflammatory drug to be detected is mixed with the lyotropic liquid crystal material, a nuclear magnetic resonance hydrogen spectrum signal with separated spectral lines is determined, and the optical purity of the chiral drug can be rapidly detected. The preparation method is efficient, the detection process is simple, the chemical displacement difference value is large, and high-throughput chiral analysis is achieved.
Owner:SHANGQIU NORMAL UNIVERSITY
Method for preparing compound pyrrolo [2, 1-a] isoquinoline alkaloid with lamelline structure by one-pot method
InactiveCN113402517AImprove universalityPotent cytotoxic activityOrganic chemistryPerfluoroacetic AcidQuinoline
The invention belongs to the technical field of medicine synthesis, and particularly relates to a method for preparing a compound pyrrolo [2, 1-a] isoquinoline alkaloid with a lamelline structure through a one-pot method. According to the invention, a tetrahydroisoquinoline derivative and a (Z)-5-phenylpent-2-ene-4-alkyne aldehyde derivative are used as raw materials, are heated to 100-130 DEG C under the catalysis of trifluoroacetic acid, and reacted for 5 hours, so that the 1-phenyl-5, 6-dihydropyrrolo [2, 1-a] isoquinoline alkaloid is obtained by a one-step method. The method has the advantages that the reaction condition is simple, the substrate has high universality and can be well converted into the target compound, an oxidizing agent does not need to be additionally used, and the compound needs to be stored in a dark place under the condition of deuterated chloroform. The compounds provide a relatively simple method for synthesizing medicines for treating sterility, and the skeleton has effective cytotoxic activity on in-vitro tumor cells.
![Method for preparing compound pyrrolo [2, 1-a] isoquinoline alkaloid with lamelline structure by one-pot method](https://images-eureka.patsnap.com/patent_img/c246d8b4-4a5a-4a92-9e61-c8bef47e1ee0/FDA0003114535070000011.png "Method for preparing compound pyrrolo [2, 1-a] isoquinoline alkaloid with lamelline structure by one-pot method")
![Method for preparing compound pyrrolo [2, 1-a] isoquinoline alkaloid with lamelline structure by one-pot method](https://images-eureka.patsnap.com/patent_img/c246d8b4-4a5a-4a92-9e61-c8bef47e1ee0/FDA0003114535070000021.png "Method for preparing compound pyrrolo [2, 1-a] isoquinoline alkaloid with lamelline structure by one-pot method")
![Method for preparing compound pyrrolo [2, 1-a] isoquinoline alkaloid with lamelline structure by one-pot method](https://images-eureka.patsnap.com/patent_img/c246d8b4-4a5a-4a92-9e61-c8bef47e1ee0/FDA0003114535070000022.png "Method for preparing compound pyrrolo [2, 1-a] isoquinoline alkaloid with lamelline structure by one-pot method")
Owner:CHANGZHOU UNIV
A kind of preparation method of deuterated chloroform
ActiveCN107814686BHigh selectivityImprove conversion efficiencyOrganic chemistry methodsHalogenated hydrocarbon preparationDeuterated chloroformHeavy water
The invention discloses a preparation method of deuterochloroform. The preparation method comprises the following steps: with hexachloroacetone, calcium oxide and heavy water as raw materials, reacting at a temperature of 80-120 DEG C; after the reaction, collecting fraction under normal pressure and at 60-61 DEG C to obtain deuterochloroform. The method has the advantages of simple technology, high yield and low cost, and can effectively break the status quo of depending on imported deuterochloroform.
Owner:宁波萃英化学技术有限公司 +1
Resin composition
This invention pertains to a resin composition, a molded body, a fiber, a film, and a sheet. The resin composition contains at least two types of polyolefin resin (A) and 0.05%-10% by mass of an alpha-olefin (co)polymer (B) that fulfills conditions (b-1)-(b-3). (b-1) The methyl group index is 40%-60%, the methyl index is ratio of integral value of peak in range of 0.50-1.15 ppm to integral value of peak in range of 0.50-2.20 ppm when (co) polymer (B) is dissolved in deuterated chloroform and 1H-NMR is measured, with solvent peak at 7.24 ppm based on CHCI3 in deuterated chloroform as reference. (b-2) the weight-average molecular weight as determined by GPC is 1,500-20,000, and (b-3) the melting point as determined by DSC is not observed in the temperature range of 100-150 DEG C.
Owner:MITSUI CHEM INC
polycarbonate diol
ActiveCN106661217BImprove dispersion stabilityHeat resistantPolyurea/polyurethane coatingsDeuterated chloroformAlicyclic Hydrocarbons
This polycarbonate diol comprises repeating units represented by formula (A) and terminal hydroxyl groups. If the integrated value of signals at 3.90 to 4.45 ppm is 1,000 in H1-NMR measured using deuterated chloroform as the solvent and tetramethylsilane as the standard substance, the integrated value at 3.33 to 3.43 ppm is 0.1 to 10.0. (In formula (A), R is a C3-15 divalent aliphatic or alicyclic hydrocarbon, and one or more types can be selected for all repeating units.)
Owner:ASAHI KASEI KK
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