35results about How to "Suitable for synthesis" patented technology

An organic fertilizer suitable for tomato growth is characterized by being composed of the following raw materials in parts by weight: 10 to 15 parts of rotten tree bark, 6 to 8 parts of cotton seed hull, 8 to 10 parts of peanut hull, 6 to 10 parts of dry cow manure, 16 to 20 parts of dry mud, 4 to 6 parts of zeolite powder, 0.05 to 0.08 part of biological fermentation inoculant, 1 to 2 parts of calcium bicarbonate, 0.2 to 0.4 part of sodium humate, 0.1 to 0.3 part of fulvic acid, 0.04 to 0.06 part of manganese sulfate, 0.02 to 0.05 part of ferrous sulfate, 2 to 3 parts of urea, 0.4 to 0.5 part of auxiliary agent, and a proper amount of water. The fertilizer is suitable for tomato growth, and is prepared by fermenting rotten tree bark, cotton seed hull and peanut hull and then adding inorganic materials into the fermented mixture. Chemical agents are added so as to implement elements (N, P, and K) which are required during the plant growth process. The organic fertilizer must be the development core of fertilizers in the future.

The invention belongs to the field of solar batteries, and particularly relates to a preparation method of slurry for a photoanode of a nano TiO2 membrane of a dye-sensitized solar cell. The method aims at solving the technical problem that the existing preparation method of the slurry required by a nano TiO2 photoanode membrane is higher in cost and complicated in technology. In order to solve the technical problem, the preparation method of the slurry for the photoanode of the nano TiO2 membrane of the dye-sensitized solar cell comprises the following steps of: a, heating commercial titanium liquid for hydrolysis, performing centrifugal settling on a hydrolysis system, removing supernatant, washing and obtaining metatitanic acid, b, adding a dispergator into metatitanic acid for dispergation, obtaining metatitanic acid slurry, and c, adding an additive to allow the metatitanic acid slurry to be dispersed uniformly. The method is simple to implement; performances of the slurry can be flexibly adjusted according to technological parameters; the obtained metatitanic acid slurry is good in dispersity and strong in stability; and a new method is provided for preparing the slurry for the photoanode of the nano TiO2 membrane of the dye-sensitized solar cell.

The invention belongs to the field of organic synthesis, fine chemicals and daily chemicals, and particularly relates to a synthetic method of hydroxypropyl tetrahydropyrantriol catalyzed by a biological enzyme. According to the method, a double-enzyme circulating catalysis system containing aldoketo reductase (AKR) and ethanol dehydrogenase (ADH) is used, and in the presence of oxidized coenzyme II (NADP), isopropanol is used as a reducing agent, so that the synthesis of the hydroxypropyl tetrahydropyrantriol is realized. As biological enzyme catalysis is adopted, the method is mild in condition, simple and convenient to operate, small in pollution, green, safe, free of metal residues and high in product purity, and is particularly suitable for synthesis of active matters of medicines and cosmetics.

The invention relates to synthesis of methyl benzoate, in particular to a synthesis method of methyl benzoate by carbonylation of bromobenzene catalyzed by non-noble metal through photochemical catalysis under mild condition. The method adopts the technical proposal comprising the following steps: filling 0.10-0.15 Mpa CO into a solution consisting of 50-200 mmol/L of bromobenzene, 5-20 mmol/L of Co(OAc)2 or CoCl2 as a catalyst and 100-1,000 mmol/l of alkali additive NaOCH3 or NaOAc, irradiating the solution by a 100-400W high voltage mercury lamp for 1-5 hours, and reacting at a temperature of between 15 and 25 DEG C. Preferably the methanol solution consisting of 50-200 mmol/L of bromobenzene, 5-20 mmol/L of Co(OAc)2 or CoCl2 as a catalyst and 100-1,000 mmol/l of alkali additive NaOCH3 or NaOAc is further added with 50-500 mmol/L of hypnone or benzophenone. The synthesis method has mild reaction condition, catalyzes reaction by simple non-noble metal salt, directly functionalizes bromobenzene, has high yield and selectivity (both can reach 91 percent) of the methyl benzoate, and is suitable for small scale production of methyl benzoate with high added value.

The invention belongs to the technical field of organic synthesis and relates to a method for preparing amino ether compounds. The method comprises the following steps: by taking amino alcohol as a raw material, protecting amino in the amino alcohol so as to obtain Schiff base; carrying out an etherification reaction on the hydroxyl group in the Schiff base; and finally, performing amino deprotection, thereby obtaining corresponding amino ethers. The method disclosed by the invention has high regio-selectivity, the substrates of higher than 99.9% are subjected to etherification reaction, the reaction conversion ratio of each step is higher than 99.8%, and the total yield is higher than 95%; when amino alcohol is chiral, the amino ethers with retention of configuration can be obtained; and moreover, each step of the method is a conventional operation, the process cost is low, and three wastes are few, the energy consumption is low, an environment-friendly effect is achieved, and large-scale industrial production is easily realized.

The invention relates to sulfonated Lewis X trisaccharide having the following structural formula as described in the description, wherein R1 is selected from a hydrogen atom, an alpha- or beta-configuration serine residue, an alpha- or beta-configuration threonine residue, an azide-substituted alkyl group, an alkynyl-substituted alkyl group, a sulfydryl-substituted alkyl group, an alpha- or beta-configuration substituted alkyl group; R2 is selected from the hydrogen atom, a sulfonic acid group, a phosphoric acid group and a carbonic acid group. The method has the advantages of less synthesissteps, high reaction selectivity, high yield and good stereoselectivity. In addition, the 3'-sulfonated modified LeX trisaccharide and the natural ligand -SLeX tetrasaccharide of E-Siglec show similaranti-inflammatory activity by anti-inflammatory activity evaluation. Compared with the Lex trisaccharide, the anti-inflammatory activity has significant difference, that is, the sulfonated Lewis X trisaccharide has good anti-inflammatory activity and can be applied in drug development.

The invention discloses a paraquat hapten. The paraquat hapten has a structure represented by formula (I) shown in the description. A group with a high electron cloud density is introduced into the paraquat hapten, and after a carrier protein is coupled, the paraquat hapten can be fully exposed to obtain a paraquat complete antigen with strong immunogenicity. The invention discloses a paraquat specific antibody based on the paraquat complete antigen. The paraquat specific antibody has the advantages of high titer, strong specificity and high sensitivity. The paraquat detection test paper comprises a chromatographic membrane and a colloidal gold module, and the colloidal gold module comprises a colloidal gold labeled paraquat specific antibody; and a detection line and a quality control line are sequentially arranged on the chromatographic membrane along the liquid chromatography direction, the detection line is coated with the paraquat complete antigen, and the quality control line iscoated with a binding antibody of the paraquat specific antibody. The paraquat detection test paper can realize sensitive and rapid detection of paraquat residues, is simple in sample pretreatment, and is suitable for large-scale detection.

Polyethylene glycol monoallyl ether reacts with a sulfhydryl compound containing an amino group or a carboxyl group to obtain sulfur-containing polyethylene glycol, and the structural general formulais shown in the description. The amino group or the carboxyl group is introduced into polyethylene glycol, so that the modified polyethylene glycol is very conveniently introduced into the resin, andthe polyethylene glycol resin with different effects is obtained.

The invention relates to a method for synthesizing icariin by glucosidation of dehydrated epimedium herb. The conventional method for synthesizing icariin by glucosidation of dehydrated epimedium herb is low in selectivity. For solving the problem, the method uses strontium carbonate as a catalyst and comprises the following steps: dissolving dehydrated icaritin in an organic solvent; reacting the icaritin with alpha-bromotetraacetyl-D-glucopyranose in the presence of strontium carbonate to perform glucosidation at position-3; reacting the product of the glucosidation with alpha-bromotriacetyl-L-rhamnopyranoside in the presence of a silver trifluoromethanesulfonate catalyst to perform glucosidation at position-7; and performing deacetylation reaction to obtain icariin. The method is suitable to synthesize icariin.

The invention discloses a preparation method of RNA polymerase using RNA as formwork and an application of the polymerase. The preparation method comprises the following steps of using alpha necrosisviruses as a raw material, preparing recombinant protein based on virus replication protein containing a polymerase structural domain and free from N-terminal transmembrane domain or transmembrane domain mutation, and the RNA polymerase having RNA dependence is obtained. The preparation method specially comprises the steps of firstly, selecting alpha necrosis viruses of tomato bushy stunt virusesas the raw material; then removing the N-terminal transmembrane domain of the virus RNA through cutting short or mutation to obtain the formwork RNA; and finally, performing synthesis on the RNA polymerase in cells or outside cells through prokaryotic expression or eukaryotic expression. According to the recombinant protein obtained by the method, the RNA yield is greater than 1 milligram/milliliter, and the preparation method is suitable for synthesis and production of industrial RNA.

The invention relates to a method for synthesis of a long-chain fatty acid ester derivative. Specifically, a hydrochloride of glycine methyl ester or glycine ethyl ester is used as a catalyst to catalyze the esterification reaction of long-chain fatty acid. The method includes: subjecting alcohol and long-chain fatty acid to esterification reaction under the action of the catalyst at certain temperature condition, then conducting extraction and precipitation with ethyl acetate, performing flushing with a sodium chloride aqueous solution for purification. A hydrochloride of glycine methyl esteror glycine ethyl ester is adopted as the catalyst, which belongs to a green catalyst, is the development trend of modern chemistry, has the characteristics of no corrosion to the reaction kettle, lowprice, no toxicity and the like, and is suitable for use as a catalyst to produce palmitate and laurate perfume raw materials.

The invention relates to a method for preparing methyl-carboxylate by photo-promoted carbonylation reaction of chloro alkane on the moderate condition of non-noble metal catalysis, under the catalysis of non-noble metal catalyst cadmium, making chloro alkane and CO or CO2 perform photo- promoted carbonylation reaction in the methanol to produce the methyl-carboxylate which increases one C as compared with the chloro alkane, where the chloro alkane in the reaction is chloro cyclohexane and/or 1-chloro octane; the catalyst is selected from (a) 4-20mmol/L CdI2, (b) combination of 5-20mmol/L CdCl2 and 4-20mmol/L NaI, or (c) combination of 5-20mmol/L Cd(NO3)2 and 4-20mmol/L NaI. And it adopts non-noble metal compound as catalyst and uses chloro alkane as substrate; and the reacting condition is moderate, the cost is low, and it is suitable for small-scale and high-added value methyl-carboxylate synthesis.