27 results about "Potassium hydride" patented technology

The invention discloses a preparation method of 3-quinuclidinone hydrochloride, which comprises the following steps: carrying out temperature control reaction on 4-picolinic acid and chloroacetic acid under alkaline water conditions to obtain an aqueous solution of a compound a, and directly entering the next reaction without post-treatment after the reaction is finished; adding a reducing agent alkaline water system into the aqueous solution of the compound a, controlling the temperature to react, controlling the temperature to adjust the pH value to 5-5.5 after the reaction is finished, extracting with n-butyl alcohol, and drying to obtain an n-butyl alcohol solution of a compound b, and directly entering the next reaction step; wherein the reducing agent is one of sodium borohydride and potassium borohydride; dropwise adding thionyl chloride into an n-butyl alcohol solution of the compound b, controlling the temperature to react after dropwise adding is ended, and concentrating to remove the solvent and unreacted thionyl chloride after the reaction is ended, so as to obtain a compound c; carrying out Dieckmann condensation reaction on the compound c at controlled temperature under the condition of organic alkali by using toluene as a solvent, carrying out hydrochloric acid quenching reaction after the reaction is finished, and directly carrying out next-step reaction after extracting and removing impurities from a water phase containing a hydrochloride solution of a compound d by using toluene; and carrying out a decarboxylation reaction on the compound d in a hydrochloric acid aqueous solution at controlled temperature, after the reaction is finished, adjusting the pH value to 10-13, extracting, and salifying to obtain a target compound TM, namely 3-quinuclidinone hydrochloride. The preparation method of 3-quinuclidinone hydrochloride provided by the invention has the advantages of economical and easily available raw materials, mild reaction conditions, efficient reaction, simple operation and low cost, and is suitable for industrial application.

The invention discloses a preparation method of a cyanoethoxy alkyl derivative, which comprises the following steps: 1, mixing polyose and deionized water, heating to 50-70 DEG C, adding a boron reducing agent in batches, cooling to room temperature, adding a catalytic amount of inorganic base into the reaction liquid according to the molar ratio of the polyose to the inorganic base being (1: 0.01)-(1: 0.1), stirring and dissolving, and reacting at 30-45 DEG C for 2-3 hours to obtain the cyanoethoxy alkyl derivative; the preparation method comprises the following steps: adding polyose into a reaction kettle, dropwise adding acrylonitrile, and after dropwise adding, carrying out heat-preservation reaction according to a feeding molar ratio of the polyose to acrylonitrile of 1: 5-1: 9; the boron reducing agent is selected from one of sodium borohydride, potassium borohydride and sodium cyanoborohydride; and 2, after the reaction is finished, firstly adding a benign organic solvent into the reaction liquid for extraction, then adding an inert organic solvent into the organic phase, stirring for crystallization, and carrying out vacuum drying on the precipitated solid to obtain the product. The method has the advantages of few side reactions, simple post-treatment, high product yield and high purity, and is suitable for industrial production.

The invention provides a core-shell quantum dot preparation method, which comprises: S1, mixing a quantum dot core-containing dispersion liquid, a first ligand, an additive, an etching agent and a first non-coordination solvent in a container, and carrying out a reaction for a certain time at a temperature of 150-200 DEG C to obtain an intermediate product system containing a surface-etched quantum dot core; the additive is selected from at least one of metal zinc, metal magnesium, sodium hydride, calcium hydride, potassium hydride, lithium aluminum hydride, sodium borohydride, a molecular sieve, calcium chloride, magnesium sulfate and sodium sulfate; s2, raising the temperature of the intermediate product system to a first temperature, adding an anion precursor and a zinc precursor into the container, and reacting for a certain time to obtain core-shell quantum dots; the anion precursor comprises at least one of a selenium precursor and a sulfur precursor; wherein the first temperature is selected from 250-340 DEG C. According to the preparation method, the size uniformity of the core-shell quantum dot after the shell layer is coated is better, so that the fluorescence half-peak width is narrowed.

The present application belongs to the technical field of wastewater treatment, and particularly relates to a method for removing total nitrogen in wastewater. Iron salt and carbon material containing hydroxyl and carbonyl are added into water, and then potassium borohydride is added, and the obtained mixture is freeze-dried under argon protection atmosphere to obtain iron-carbon filler; the iron-carbon filler is added into wastewater, the wastewater is adjusted to be weakly acidic, and stirring reaction is carried out for 0.5-1.5 h to obtain reduced effluent; persulfate is added into the reduced effluent, the wastewater is adjusted to be alkaline, and stirring reaction is carried out for 0.5-1.5 h, and then solid-liquid separation is carried out, and the obtained supernatant is treated effluent. The present application can remove total nitrogen in wastewater only by using iron-carbon filler and persulfate at normal temperature and pressure, and has the advantages of fast conversion rate, strong anti-interference ability, no secondary pollution and the like compared with traditional chemical oxidation-reduction technology; the reaction has wide original sources, low price, simple operation, and is environment-friendly, and has obvious economic and environmental benefits.

The invention provides a method for deeply removing oxygen in titanium system powder, which comprises the following steps: mixing titanium system powder to be deoxidized, a deoxidizing agent and an electron transfer agent, and carrying out deoxidation reaction to obtain a deoxidized material; the deoxidizing agent is a calcium deoxidizing agent or a sodium deoxidizing agent, the calcium deoxidizing agent is metal calcium and / or calcium hydride, the sodium deoxidizing agent is metal sodium and / or sodium hydride, and the electron transfer agent is anhydrous magnesium chloride; or the deoxidizing agent is a potassium deoxidizing agent or a barium deoxidizing agent, the potassium deoxidizing agent is metal potassium and / or potassium hydride, the barium deoxidizing agent is metal barium and / or barium hydride, and the electron transfer agent is anhydrous magnesium chloride and / or anhydrous calcium chloride. According to the method, deep removal of oxygen in the titanium-series powder can be achieved, the obtained deoxidized material is subjected to acid pickling or water washing and then acid pickling, and the deoxidized titanium-series powder can be directly obtained.

The invention discloses a method for harmless treatment of waste white phosphorus and recovery of copper, and belongs to the technical field of harmless treatment of hazardous waste, white phosphorus is dissolved in carbon disulfide, the carbon disulfide is slowly and dropwise added into a copper sulfate aqueous solution at the speed of 0.1-0.3 kg / min and reacts with the copper sulfate aqueous solution to generate copper and cuprous phosphide, and the cuprous phosphide is recycled. According to the method, the white phosphorus is dissolved in the carbon disulfide, the specific surface area of the white phosphorus is increased, the white phosphorus can be in full contact with the copper sulfate solution at the normal temperature to react to generate copper and cuprous phosphide, and the cuprous phosphide can be recycled after the reaction is finished. The method is simple, easy to operate and capable of saving chemicals, copper in copper sulfate is recycled while waste white phosphorus is subjected to innocent treatment, resources are reasonably utilized, cost is saved, safety and high efficiency are achieved, and good economic benefits are achieved.

The invention discloses a catalyst for preparing citronellal by selective reduction of citral and a preparation method thereof. A magnesium oxide carrier is obtained by calcining a magnesium salt at high temperature, a palladium precursor is uniformly loaded on magnesium oxide by adsorption, palladium is reduced with sodium borohydride, potassium borohydride or sodium formate, and then a hydrophobic hydrogenation catalyst is obtained by modification with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane. The catalyst prepared in this way has high catalytic activity and selectivity for the reaction of preparing citronellal by selective reduction of citral. The catalyst active components of the present invention are highly dispersed, highly active, and have a selectivity of ≥98%, and the catalyst cost is low, and has a high industrial application value.

This invention provides a Fenton oxidation reaction promoter and a method for promoting the Fenton oxidation reaction. The promoter, by weight, comprises the following components in parts: 10-50 parts of a metal salt, 5-35 parts of a reducing agent, and 0-20 parts of an auxiliary agent. The amount of metal in the metal salt is not less than the amount of reducing agent, and the metal salt is selected from at least one of zinc or copper salts. The reducing agent is selected from at least one of sodium sulfide, sodium hydrosulfide, hydrogen sulfide, potassium sulfide, and potassium hydrosulfide. The auxiliary agent is selected from at least one of xanthic acid derivatives and dithiocarbamate derivatives. The Fenton oxidation reaction promoter is dissolved or suspended in water and added to the Fenton oxidation reaction process. It can promote the reduction rate of ferric iron, improve the Fenton oxidation effect, reduce the amount of iron added in the Fenton reaction, and thus reduce the yield of iron sludge. This promoter has the characteristics of low dosage, good effect, and simple and convenient use.

The application discloses a preparation method of an anode material for treating organic wastewater, and comprises the following steps: (1) dissolving silver nitrate, ammonia water, sodium hydroxide and formaldehyde in deionized water to obtain a precursor solution, then fixing a commercial electrode in the precursor solution, and performing heating and stirring treatment to obtain an Ag / commercial electrode sheet; (2) preparing a plating solution by using nickel salt, ethylenediamine, potassium borohydride and sodium hydroxide, then fixing the Ag / commercial electrode sheet obtained in the step (1) in the plating solution, and performing heating and stirring treatment, and then performing washing and drying to obtain the anode material. When the electrode material is used for electrocatalytic oxidation treatment of 3-aminomethyl-3, 5, 5-trimethylcyclohexylamine wastewater, the ammonia oxidation rate is higher, and the COD and NH4-N values of the organic wastewater can be effectively reduced. The application further discloses the anode material obtained by the preparation method and application thereof.

The invention relates to a production method for improving photo-thermal stability of a chloromethyl ethyl ether industrial product, and belongs to the technical field of chloromethyl ethyl ether processing.The preparation of an intermediate 1 comprises the steps that 80-120 mL of ethyl alcohol, 20-25 g of 3, 5-di-tert-butyl-4-hydroxybenzaldehyde and 6-10 g of n-butylamine are added into a 250 mL four-opening bottle provided with a backflow water diversion device, the temperature is increased to 60 DEG C, a reaction is carried out for 1 h, and an intermediate 2 is obtained; cooling to 0 DEG C by adopting an ice salt bath, adding 1-3g of potassium borohydride in batches, keeping the temperature at 0 DEG C, continuing to react for 0.5 hour, and adding a 5% citric acid aqueous solution to adjust the pH value to 2.0-3.0; the special photo-thermal stabilizer is synthesized and compounded with the epoxidized soybean oil, a single stabilizer and a special formula free of chloromethyl ether are generally adopted in the traditional method, the photo-thermal stabilizer containing the hindered phenol and piperazine structure is synthesized by the method, synergistic protection of light shielding, thermal stability and acid capture is achieved after compounding, and the product performance is remarkably improved; and the purity retention rate is 95-97% after 168h of ultraviolet aging.

The invention discloses a total arsenic online monitoring reagent formula and a preparation method, the total arsenic online monitoring reagent formula comprises a reagent A, a reagent B, a reagent C, a reagent D and a total arsenic standard solution, the reagent A is composed of sulfuric acid, potassium persulfate and pure water, the reagent B is composed of sodium acetate trihydrate, glacial acetic acid, an emulsifier OP-10, silver carbonate, absolute ethyl alcohol and pure water, the reagent C is composed of sulfuric acid, tartaric acid and pure water, and the reagent D is composed of sodium acetate trihydrate, glacial acetic acid, an emulsifier OP-10, silver carbonate, absolute ethyl alcohol and pure water. The reagent D is composed of potassium hydroxide, potassium borohydride and pure water, and the total arsenic standard solution is mother liquor with the concentration of 1000 mg / L. Through the synergistic effect of silver carbonate in the reagent B and the emulsifier OP-10, interference substances such as sulfides and heavy metal ions can be effectively shielded, the relative standard deviation of a monitoring result is smaller than or equal to 5%, and the accuracy of monitoring data is improved.

The invention discloses an efficient synthesis process of a fludioxonil intermediate, and belongs to the technical field of organic synthesis.The efficient synthesis process comprises the steps that pores of supported biochar powder are filled with nanometer aluminum oxide and nanometer cerium oxide, then metal oxide biochar powder is modified through a silane coupling agent, Pd-MOF is grafted to the modified biochar powder, and the modified biochar powder is modified through a silane coupling agent to obtain the fludioxonil intermediate. The three-dimensional space structure of MOF is utilized to provide more active sites for palladium, the catalytic efficiency of palladium can be improved, fluorine ions are promoted to replace chloride ions, efficient reaction is facilitated, the porous structure in the composite charcoal powder can improve the loading rate of nano aluminum oxide and nano cerium oxide, and the catalytic activity of palladium is improved. Lewis acid sites on the surfaces of the nano aluminum oxide and the nano cerium oxide can adsorb hydrogen fluoride molecules, the hydrogen fluoride molecules are enriched in composite catalyst powder in a physical adsorption and chemical combination mode through the nano aluminum oxide and the nano cerium oxide, then the hydrogen fluoride and excessive potassium fluoride generate potassium bifluoride, and the thermal decomposition reaction rate of the potassium bifluoride is inhibited.

The application discloses a composite aerogel for adsorbing Cs + , Sr 2+ in wastewater and a preparation method thereof. The MoS2@SA aerogel is obtained by mixing molybdenum disulfide (MoS2) nanosheets and sodium alginate (SA), cross-linking with calcium chloride and freeze-drying; the ZIF-8 / MoS2@SA aerogel is obtained by sequentially immersing the MoS2@SA aerogel into a solution containing zinc acetate dihydrate and 2-methyl imidazole and then cyclically growing ZIF-8; and the KMg@ZIF-8 / MoS2@SA aerogel is obtained by sequentially immersing the ZIF-8 / MoS2@SA aerogel into a solution containing potassium ferrocyanide and magnesium chloride and then growing potassium ferrous hydroxide magnesium. The composite aerogel can effectively adsorb heavy metal ions Cs and Sr in water and is widely used in wastewater treatment processes discharged by research institutes, factories and the like.

The invention discloses a synthesis method of 2-pyridine sulfonyl fluoride, which comprises the following steps: dissolving 2-mercaptopyridine in a system solution, and carrying out oxidation reaction with hydrochloric acid and sodium hypochlorite to obtain a sulfonyl chloride intermediate state; according to the method, sulfonyl chloride in an intermediate state and a potassium bifluoride aqueous solution are subjected to a substitution reaction under the catalysis of a phase transfer catalyst to obtain 2-pyridine sulfonyl fluoride, so that the synthesis process of 2-pyridine sulfonyl fluoride is effectively simplified, and the yield is improved.

This invention discloses a method for synthesizing monoclinic hafnium dioxide nanorods. The method uses hafnium oxide and potassium hydrofluoric acid as raw materials, and synthesizes uniform monoclinic hafnium dioxide nanorods through a two-step process of high-temperature calcination and subsequent hydrolysis. This method utilizes common, simple, and readily available raw materials, has a short reaction time and low reaction temperature, avoids complex procedures, and simplifies the process. The synthesized monoclinic hafnium dioxide nanorods are uniform in size and exhibit minimal agglomeration. This invention also discloses the application of the monoclinic hafnium dioxide nanorods synthesized by the above method in coating plastic or metal surfaces.

This invention discloses a method for preparing hydrogen fluoride using ammonium fluoride. Specifically, ammonium fluoride and potassium fluoride are dissolved in water to obtain a mixed solution. After the mixed solution reacts at 100℃~200℃, solid-liquid separation is performed. The solid is dried to obtain potassium fluoride solid, while the liquid is returned to the initial ammonium fluoride and potassium fluoride reaction system for recycling. Potassium fluoride and sodium fluoride are mixed and hydrogen fluoride gas is prepared under molten conditions. After the reaction, the residual solid is dissolved in water, filtered, and the filtrate is returned to the ammonium fluoride and potassium fluoride reaction system for recycling. The filter cake is dried and returned to the potassium fluoride and sodium fluoride reaction system for recycling. This method can realize material recycling and solves the problems of low raw material utilization and serious material waste in existing hydrogen fluoride preparation processes.

This invention discloses a method for preparing tin dioxide nanofilms. The method uses micron-sized tin dioxide powder and potassium hydrofluoric acid as raw materials, and synthesizes tin dioxide nanofilms through a two-step process of high-temperature calcination and hydrolysis precipitation. The entire process utilizes simple and readily available raw materials, reducing raw material costs. The synthesized tin dioxide nanofilms exhibit varying densities, with small and uniformly distributed nanoparticles and minimal particle aggregation. The synthesis process is relatively simple, with extremely short reaction times and low reaction temperatures, avoiding complex chemical processes and simplifying the overall process.

The application discloses a kind of synthesis process of sulfonyl fluoride compound;Under the protection of nitrogen, containing sulfhydryl compound and dimethyl sulfonium bromide are reacted under the action of base, oxidizing reagent, fluorinating reagent, and sulfuryl fluoride compound is generated by oxidation fluorination reaction;Among them, the base is 2,4,6-trimethylpyridine, the oxidizing agent is sodium chlorite, the fluorinating reagent is potassium hydrogen fluoride, and the sulfhydryl compound is aliphatic mercaptan or contains aromatic ring or heterocyclic thiol;The method of the application has mild conditions, simple and readily available raw materials, simple operation, and has high application value.

The application provides a skin glass composition, the skin glass and a preparation method and application thereof. The composition comprises, in terms of mass percentage: 60-75% of quartz sand, 1.5-15% of boric acid, 1-5% of aluminum oxide, 1-10% of sodium carbonate, 1-8% of potassium bifluoride, 1-8% of calcium fluoride, 0-5% of basic magnesium carbonate, 0-8% of lithium carbonate, 0-5% of zinc oxide and 0-2% of cerium oxide; the total content of impurities Fe, Cu and Mn in the raw materials is less than or equal to 3ppm, and the total content of impurities Nd, Pr, U, Er, Eu, Tb and Dy is less than or equal to 2ppm. The technical problem to be solved is how to prepare the skin glass, so that the skin glass can simultaneously meet the requirements of wide spectrum response, radiation resistance and low refractive index, and the spectral transmittance is greater than or equal to 75% in the wavelength range of 330-2000nm under the thickness of 100mm; the skin glass is applied to the environment of high radiation and wide spectrum detection in the field of aerospace, so that the imaging clarity and service life of the glass can be effectively improved, and long-distance detection is realized.

The application belongs to the field of new energy, and discloses a preparation process of lithium hexafluorophosphate, which comprises the following steps: step 1: lithium fluoride and phosphorus pentachloride are reacted in an organic solvent to obtain a first mixture; and step 2: a fluorination reagent is added into the first mixture to obtain lithium hexafluorophosphate; the fluorination reagent is one or more of potassium fluoride, ammonium fluoride, calcium fluoride, potassium bifluoride and ammonium bifluoride. The process can obtain lithium hexafluorophosphate by a solvent method, and the yield is not less than 88%. Meanwhile, the application also discloses lithium hexafluorophosphate obtained based on the process.

The invention discloses composite aerogel for adsorbing Cs < + > and Sr < 2 + > in wastewater and a preparation method of the composite aerogel. The preparation method comprises the following steps: mixing molybdenum disulfide (MoS2) nanosheets with sodium alginate (SA), crosslinking with calcium chloride, and freeze-drying to obtain MoS2-SA aerogel; sequentially putting the MoS < 2 >-SA aerogel into a solution containing zinc acetate dihydrate and 2-methylimidazole to soak and cyclically grow ZIF-8, so as to obtain ZIF-8 / MoS < 2 >-SA aerogel; the ZIF-8 / MoS2-coated SA aerogel is sequentially put into a solution containing potassium ferrocyanide and magnesium chloride to be soaked to grow potassium magnesium ferrohydride, and the KMg-coated ZIF-8 / MoS2-coated SA aerogel is obtained. The composite aerogel can effectively adsorb heavy metal ions Cs and Sr in water, and is widely applied to the treatment process of wastewater discharged from heavy metal ion research institutes, factories and the like.

The invention discloses an efficient synthesis process for a fludioxonil intermediate, belonging to the technical field of organic synthesis. Nano-alumina and nano-cerium oxide are filled in the pores of supported biochar powder, the metal oxide biochar powder is modified by a silane coupling agent, and Pd-MOF is grafted onto the modified biochar powder. The three-dimensional spatial structure of the MOF is utilized to provide more active sites for palladium, thereby improving the catalytic efficiency of palladium, promoting the replacement of chloride ions by fluoride ions, and facilitating the efficient progress of the reaction. The porous structure in the composite biochar powder can increase the loading rate of the nano-alumina and nano-cerium oxide, while the Lewis acid sites on the surfaces of the nano-alumina and nano-cerium oxide can adsorb hydrogen fluoride molecules. The hydrogen fluoride molecules are enriched in the composite catalyst powder by physical adsorption and chemical bonding, and then react with excess potassium fluoride to generate potassium bifluoride, thereby suppressing the thermal decomposition reaction rate of the potassium bifluoride.

The invention discloses an industrial synthesis system and an industrial synthesis method of electronic-grade diborane, and belongs to the technical field of electronic-grade diborane production, the industrial synthesis system comprises a reaction part, a treatment part and a filling system, the reaction part comprises a reaction kettle and a collection cold trap, and the treatment part comprises a light component removal tower and a heavy component removal tower; the industrial synthesis method comprises the following steps: adding a potassium hydride raw material and boron trifluoride into a reaction kettle for reaction, remaining in a collection cold trap, conveying to a light component removal tower, extracting light components such as nitrogen and oxygen from the top of the light component removal tower to a three-waste treatment system, extracting light component removal components from the side line of the light component removal tower to enter a heavy component removal tower, and removing heavy components from the heavy component removal tower. Heavy components are extracted from the tower kettle of the heavy component removal tower to a three-waste system, and high-purity diborane gas is extracted from the tower top of the heavy component removal tower to a filling system. According to the method disclosed by the invention, the electronic-grade diborane of which the purity is greater than or equal to 99.999% can be finally produced, and the problem that the purity of the electronic-grade diborane is not enough in the prior art is solved.

The invention provides a leather glass composition, leather glass as well as a preparation method and application of the leather glass. The composition comprises the following components in percentage by mass: 60-75% of quartz sand, 1.5-15% of boric acid, 1-5% of aluminum oxide, 1-10% of sodium carbonate, 1-8% of potassium bifluoride, 1-8% of calcium fluoride, 0-5% of basic magnesium carbonate, 0-8% of lithium carbonate, 0-5% of zinc oxide and 0-2% of cerium oxide. In the raw materials, the total content of the impurities Fe, Cu and Mn is smaller than or equal to 3 ppm, and the total content of the impurities Nd, Pr, U, Er, Eu, Tb and Dy is smaller than or equal to 2 ppm. The technical problem to be solved is how to prepare the leather glass, so that the leather glass can simultaneously meet the requirements of wide spectral response, radiation resistance and low refractive index, and the spectral transmittance is greater than or equal to 75% in the wavelength range of 330-2000nm under the thickness of 100mm. When the glass is applied to high-ray irradiation and wide-spectrum detection environments in the aerospace field, the imaging definition of the glass can be effectively improved, the service life of the glass can be effectively prolonged, and long-distance detection is realized.

The present invention provides a synthesis process of a roxatidine intermediate 3, comprising the following steps: dissolving m-hydroxybenzaldehyde in water, adding a sodium hydroxide aqueous solution, concentrating under reduced pressure after post-treatment, and filtering until there is substantially no droplet, to obtain a filter cake of sodium m-hydroxybenzaldehyde; using 3-chloropropylamine hydrochloride as a starting material, stirring and reacting with di-tert-butyl dicarbonate in a dichloromethane system under alkaline conditions in the presence of sodium hydroxide to obtain BOC-3-chloropropylamine; adding sodium m-hydroxybenzaldehyde, tetrabutylammonium bromide and purified water to the BOC-3-chloropropylamine prepared in step (2) to obtain RXTA4; adding methanol to the RXTA4 obtained in step (3), stirring until the system is dissolved and clear, slowly adding potassium borohydride in batches, and then adding piperidine to finally obtain the roxatidine intermediate 3. The synthesis process of a roxatidine intermediate 3 proposed by the present invention has mild reaction temperature, good reaction selectivity and high synthesis yield.

This invention belongs to the field of molecular synthesis and materials technology, and discloses a method for preparing small molecule materials based on benzothiophene-benzodithiophene (DBDTT) and benzoselenophene-benzodiselenophene, as well as their applications. The method includes: using 1-chloro-2-iodobenzene or 1-chloro-2-bromobenzene and trimethylethynylsilane as raw materials, after a stalk coupling reaction, removing the TMS (trimethylsilyl group) with potassium hydrofluoric acid to obtain a key intermediate; using S8 or Se as a sulfur source or selenium source, and potassium carbonate as a base, a series of fused-ring thiophene / selenophene small molecule materials are synthesized through a cascade cyclization reaction. The substrates of this invention are simple to synthesize, the raw materials are inexpensive and readily available; no metals are involved; the reaction can be carried out under air conditions; the reaction efficiency is high, with three rings fused simultaneously in a single step; the yield is moderate, and even at a large scale (10 mmol), the yield can still reach 58%. Therefore, this method is suitable for industrial production.

The present application relates to a kind of synthesis methods of reducing ambrox, comprising the following steps: ambrinol is dissolved in organic solvent, then adding catalyst aluminum trichloride, quaternary ammonium salt catalyst, then stirring condition is at least divided into 3 times and adds potassium borohydride, control reaction liquid temperature is 20-25 degrees Celsius, the total consumption time of first feeding to reaction end of potassium borohydride is 2-5h, reaction generates reducing ambrox, obtains the reaction liquid containing reducing ambrox;Dilute sulfuric acid is added to the reaction liquid containing reducing ambrox, adjusts the pH of reaction liquid to 3-4, keep 1h, then drop alkali solution, adjust the pH of reaction liquid to 5.2-7.5, keep 1h, filter, filtrate is placed and is layered, organic solvent layer is concentrated to dryness under reduced pressure and obtains reducing ambrox product.The present application process condition is mild, yield is high, product purity is good, raw material cost is low, pollution is small, easy to industrialization.