CN110028395A - A kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone - Google Patents

A kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone Download PDF

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CN110028395A
CN110028395A CN201910457269.5A CN201910457269A CN110028395A CN 110028395 A CN110028395 A CN 110028395A CN 201910457269 A CN201910457269 A CN 201910457269A CN 110028395 A CN110028395 A CN 110028395A
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protecting group
cyclohexanone
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acid
hydroxy phenyl
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岳刚
王志强
丁秋月
禹凯
王利民
陈少华
关登仕
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Ningxia Zhongxing Display Materials Co Ltd
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Ningxia Zhongxing Display Materials Co Ltd
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    • C07D309/02Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D309/08Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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Abstract

The present invention relates to technical field of chemical synthesis, specifically disclose a kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone.The preparation method is using p bromophenol as raw material; through hydroxyl protection; grignard reaction prepares Grignard Reagent; then the Grignard Reagent and 1 being prepared is utilized; the coupling of 4- cyclohexanedione monoethylene acetal; it is dehydrated into alkene, double blocking groups is taken off after adding hydrogen, prepares target product 4- (4- hydroxy phenyl) cyclohexanone.The preparation method of 4- (4- hydroxy phenyl) cyclohexanone provided by the invention has technological design reasonable, high income, the low advantage of production cost, 4- (4- hydroxy phenyl) cyclohexanone being prepared is white solid, and HPLC content is greater than 99.5%, and total yield of products can reach 75-80%, and raw material is easy to get, it is easy to operate, it is highly-safe, realize the industrialized production of 4- (4- hydroxy phenyl) cyclohexanone.

Description

A kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone
Technical field
The present invention relates to technical field of chemical synthesis more particularly to a kind of preparation sides of 4- (4- hydroxy phenyl) cyclohexanone Method.
Background technique
4- (4- hydroxy phenyl) cyclohexanone, structural formula are as follows:
Molecular formula is C12H14O2, it is a kind of white solid, is a kind of important chemical and medicine industry intermediate, and prepare a variety of The important intermediate of liquid crystal material.In recent years, with the fast development of liquid crystal industry and pharmaceuticals industry, to 4- (4- hydroxy benzenes Base) demand of cyclohexanone increases year by year.
In existing literature report, the synthetic route of synthesis 4- (4- hydroxy phenyl) cyclohexanone is mainly with 4,4'- biphenyl two Phenol is raw material, is reduced to 4- (4- hydroxycyclohexan) phenol through reducing agent, is protected to obtain 4- (4- benzyloxy benzene) hexamethylene with benzyl chloride Alcohol obtains 4- (4- benzyloxy benzene) cyclohexanone through oxidation, then prepares through palladium-carbon catalyst catalytic hydrogenation.But in the technique The selectivity of palladium charcoal catalytic hydrogenation step is poor, causes the yield of 4- (4- hydroxy phenyl) cyclohexanone lower, and the technique is also deposited The disadvantages of environmental pollution is big, preparation cost is high.Therefore, it in order to improve the yield of 4- (4- hydroxy phenyl) cyclohexanone, and reduces Environmental pollution reduces production cost, it is necessary to find a kind of more environmentally friendly, capable of being industrialized production technology.
Summary of the invention
For the technique of prior art preparation 4- (4- hydroxy phenyl) cyclohexanone, there are yield is low and environmental pollution is big, system Standby problem at high cost, the present invention provide a kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone.
In order to solve the above technical problems, present invention provide the technical scheme that
A kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone, includes the following steps:
Step 1: p bromophenol is reacted with hydroxy-protecting agent, obtain to protecting group bromobenzene;
Step 2: carrying out grignard reaction to protecting group bromobenzene and magnesium metal, obtain to protecting group phenyl-magnesium-bromide;
Step 3: to protecting group phenyl-magnesium-bromide and Isosorbide-5-Nitrae-cyclohexanedione monoethylene acetal progress coupling reaction, acidolysis, It obtains to protecting group phenylcyclohexanol ethylene glycol single ketal;
Step 4: dehydration is carried out under dehydrating agent catalytic action to protecting group phenylcyclohexanol ethylene glycol single ketal, It obtains to protecting group phenyl cyclohexene ethylene glycol single ketal;
Step 5: carrying out catalytic hydrogenation reaction to protecting group phenyl cyclohexene ethylene glycol single ketal and hydrogen, obtain to protection Base phenylcyclohexyl ethylene glycol single ketal;
Step 6: being reacted with deprotection agent protecting group phenylcyclohexyl ethylene glycol single ketal, 4- (4- hydroxy phenyl) is obtained Cyclohexanone.
The reaction equation of above-mentioned preparation process is as follows:
Compared with the existing technology, the present invention provides a kind of new 4- (4- hydroxy benzenes by designing new synthetic route Base) cyclohexanone preparation method, using p bromophenol as raw material, through hydroxyl protection, grignard reaction prepares Grignard Reagent, then utilizes Grignard Reagent and Isosorbide-5-Nitrae-cyclohexanedione monoethylene acetal being prepared are coupled, and are dehydrated into alkene, take off double protecting groups after adding hydrogen Group, prepares target product 4- (4- hydroxy phenyl) cyclohexanone.The preparation side of 4- (4- hydroxy phenyl) cyclohexanone provided by the invention Method has technological design reasonable, high income, the low advantage of production cost, and the 4- being prepared (4- hydroxy phenyl) cyclohexanone is white Color solid, HPLC content are greater than 99.5%, and total yield of products can reach 75-80%, and raw material is easy to get, easy to operate, safety Height realizes the industrialized production of 4- (4- hydroxy phenyl) cyclohexanone.
Preferably, the preparation method of 4- (4- hydroxy phenyl) cyclohexanone includes the following steps:
Step 1: p bromophenol and acid binding agent are added in the first solvent, it is uniformly mixed, under inert gas protection, drop Add hydroxyl protection agent solution, in 0-50 DEG C of reaction 2-5h, obtains to protecting group bromobenzene;
Step 2: protecting group bromobenzene is added in the second solvent by described, obtain to protecting group bromobenzene solution, in inert gas It under protection, is added dropwise in magnesium metal, in 0-80 DEG C of reaction 1-3h, is obtained to protecting group phenyl-magnesium-bromide;
Step 3: Isosorbide-5-Nitrae-cyclohexanedione monoethylene acetal is added in second solvent, Isosorbide-5-Nitrae-cyclohexanedione list is obtained Ethylene ketal solution, under inert gas protection, be added dropwise to it is described in protecting group phenyl-magnesium-bromide, in 30-100 DEG C 4-12h is reacted, acid hydrolysis solution is added and obtains in 0-30 DEG C of progress acidolysis to protecting group phenylcyclohexanol ethylene glycol single ketal;
Step 4: protecting group phenylcyclohexanol ethylene glycol single ketal is added in third solvent by described, dehydrating agent is added, Reflux dewatering 4-12h is obtained to protecting group phenyl cyclohexene ethylene glycol single ketal;
Step 5: protecting group phenyl cyclohexene ethylene glycol single ketal is added in the 4th solvent by described, catalyst is added, It is passed through hydrogen, in 20-80 DEG C, under conditions of reaction pressure is 1-5 atmospheric pressure, 2-12h is reacted, obtains to protecting group phenyl hexamethylene Ethyl glycol single ketal;
Step 6: protecting group phenylcyclohexyl ethylene glycol single ketal is added in the 5th solvent by described, deprotection is added Agent, 0-100 DEG C of reaction 2-8h obtain 4- (4- hydroxy phenyl) cyclohexanone.
Preferred above-mentioned reaction condition, can be such that reaction raw materials in each step sufficiently react, improve the conversion ratio of raw material, as far as possible The generation for reducing side reaction is conducive to the yield and purity that improve product.
Heretofore described inert gas can be the inert gas of this field routine, such as nitrogen, argon gas.
Preferably, the hydroxy-protecting agent is dihydropyran, dimethoxym ethane, trim,ethylchlorosilane or tert-butyldimethylsilyl chloride silicon Alkane.
Preferred hydroxy-protecting agent is successfully realized the reaction for being prepared Grignard Reagent using p bromophenol as raw material, and made The Grignard Reagent of preparation hydroxy-protective group in subsequent coupling, acidolysis, dehydration and hydrogenation process can be stabilized, together When, during also helping step 6 deprotection, the difunctional protection of hydroxyl and ethylene ketal can be directly taken off, thus So that the target that 4- (4- hydroxy phenyl) cyclohexanone is prepared in the synthetic route designed through the invention is smoothly realized.
Preferably, the acid binding agent is pyridine, triethylamine, imidazoles, sodium carbonate, potassium carbonate, sodium hydroxide or potassium hydroxide At least one of.
Preferred acid binding agent may advantageously facilitate reaction forward progress, improve the conversion ratio of reaction rate and reaction raw materials.
Preferably, the catalyst is at least one of Raney's nickel, palladium charcoal or ruthenium carbon.
Preferred catalyst has reactivity high, and selectivity is good, and the mild advantage of reaction condition can be improved to guarantor The reaction rate of base phenyl cyclohexene ethylene glycol single ketal and hydrogen is protected, and can repeat to recycle, advantageously reduces production Cost.
Preferably, in step 1, time for adding 50-60min.
Preferably, in step 2, time for adding 30-60min.
Preferably, in step 3, time for adding 10-30min.
Preferred time for adding can be such that dropwise addition object in system is in suitable and lower concentration range always, avoid pair The generation of reaction reduces the content of impurity in product, improves the utilization rate that object is added dropwise, to be conducive to improve total receipts of product Rate and purity.
Preferably, first solvent be toluene, methylene chloride, chloroform, carbon tetrachloride, dichloroethanes, tetrahydrofuran or At least one of ether.
Preferably, second solvent be ether, tetrahydrofuran, dioxane, toluene or methyl tertiary butyl ether(MTBE) in extremely Few one kind.
Preferably, the third solvent is at least one of hexamethylene, n-hexane or toluene.
Preferably, the 4th solvent is at least one of methanol, ethyl alcohol, petroleum ether or tetrahydrofuran.
Preferably, the 5th solvent is at least one in methanol, ethyl alcohol, methylene chloride, toluene, acetic acid or trifluoroacetic acid Kind.
Preferred solvent is conducive to be sufficiently mixed between reaction raw materials, improves the utilization rate of raw material, reduces the hair of side reaction It is raw, while also helping the product that each step reaction is prepared and being dissolved in reaction system, it ensure that the smooth of reaction in next step It carries out, it is often more important that, the reactivity of reaction raw materials can be improved in preferred solvent, improves the reaction rate of each step.
Preferably, in step 1, the molar ratio of the p bromophenol, the hydroxy-protecting agent and the acid binding agent is 1:1- 1.5:1.2-2.0。
Preferably, in step 2, the molar ratio to protecting group bromobenzene and the magnesium metal is 1:1.05-1.2.
Preferably, in step 2, the molar ratio to protecting group bromobenzene and the magnesium metal is 1:1.05-1.2.
Preferably, described is 1:1.1- to protecting group bromobenzene and the Isosorbide-5-Nitrae-cyclohexanedione ethylene glycol single ketal molar ratio 1.3。
Preferably, in step 1, the solvent of the hydroxyl protection agent solution is toluene, methylene chloride, chloroform, four chlorinations At least one of carbon, dichloroethanes, tetrahydrofuran or ether, and the volume of solvent is 2-5 times of hydroxy-protecting agent quality, In, the unit of volume is milliliter, and the unit of quality is gram.
Preferably, in step 3, the acid hydrolysis solution is the aqueous solution of hydrogen chloride, sulfuric acid, formic acid or ammonium chloride, the acidolysis The mass concentration of solution is 20-70%, described to hydrogen chloride, sulfuric acid, formic acid or chlorination in protecting group bromobenzene and the acid hydrolysis solution The molar ratio of ammonium is 1:1.5-2.5.
Preferably, in step 4, the dehydrating agent be the concentrated sulfuric acid, p-methyl benzenesulfonic acid, methanesulfonic acid or highly acidic resin in extremely Few one kind, the additional amount of the dehydrating agent are the 5-20% to protecting group bromobenzene quality
The heretofore described concentrated sulfuric acid is the sulfuric acid that mass concentration conventional in industry is greater than 98%.
Preferably, in step 5, the additional amount of the catalyst is the 1-20% to protecting group bromobenzene quality.
Preferably, in step 6, the deprotection agent is the aqueous solution of acid, and the acid is formic acid, glacial acetic acid, trifluoro second One or more of in acid, hydrogen chloride, the concentrated sulfuric acid, p-methyl benzenesulfonic acid or methanesulfonic acid, the mass concentration of the deprotection agent is 20- 50%, the acid is 1-2:1 with the molar ratio to protecting group bromobenzene.
Ratio between preferred each reactant, can be improved the utilization rate of raw material, to improve 4- (4- hydroxy phenyl) The yield and purity of cyclohexanone product.
Preferred deprotection agent and the collocation of preferred hydroxy protecting agent use, and can make to carry out being deprotected in step 6 anti- At once, while the difunctional of eliminating hydroxide blocking group and ethylene ketal is protected, and is simplified reaction step, is conducive to improve Production efficiency.
Preferably, step 1 is into step 6, first solvent, the second solvent, third solvent, the 4th solvent and the 5th The addition volume of solvent is respectively 2-5 times of corresponding dissolved substrate quality, wherein the unit of volume is milliliter, the list of quality Position is gram.
Preferred solvent adding amount ensure that the abundant dissolution of reaction raw materials and reaction product, be conducive to every single step reaction It goes on smoothly, other than first step preparation needs to purify to protecting group bromobenzene product, remaining step is not necessarily to purification can be direct Next step reaction is carried out, reaction step is enormously simplified, is advantageously implemented continuous production, improve production efficiency.
The preparation method of 4- (4- hydroxy phenyl) cyclohexanone provided through the invention, raw materials used is common agents, is removed Except Isosorbide-5-Nitrae-cyclohexanedione monoethylene acetal cost is slightly higher, remaining raw material is cheap, and production cost is low, and operates letter Single, highly-safe, the three wastes are few, environmentally friendly, and 4- (4- hydroxy phenyl) cyclohexanone being prepared is white solid, and HPLC contains Amount is greater than 99.5%, and total recovery realizes the industrialized production of 4- (4- hydroxy phenyl) cyclohexanone up to 75-80%.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to Limit the present invention.
Embodiment 1
A kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone:
Step 1: triethylamine 242.9g is placed in 3000ml there-necked flask by p bromophenol 346g, 1000mL dichloromethane is added Alkane is sufficiently stirred, and under the conditions of 0 DEG C of ice salt bath, the dichloromethane solution of trim,ethylchlorosilane is added dropwise, and (250g trim,ethylchlorosilane is molten In 700mL methylene chloride), temperature control is no more than 30 DEG C, and after 60min is dripped, white salt, warming-in-water to 30 occurs in system DEG C, 3h is stirred, 600ml water is added into system, after stirring 30min, post-processing can be obtained to the colourless of trimethylsiloxy group bromobenzene Transparency liquid 463.48g, yield 94.6%, purity 99.3%;
Step 2: magnesium chips 8.7g is placed in 500mL there-necked flask under nitrogen protection, 40 DEG C of water-bath, will be prepared into above-mentioned To trimethylsiloxy group bromobenzene 73.5g is dissolved in 300mL tetrahydrofuran, be added dropwise in there-necked flask, after 60min is added dropwise 45 DEG C of water-bath, 2h is stirred, is obtained to trimethylsiloxy group magnesium bromide crude product;
Step 3: under nitrogen protection, to dropwise addition Isosorbide-5-Nitrae-cyclohexanedione second two in trimethylsiloxy group magnesium bromide crude product The toluene solution (51.5g1,4- cyclohexanedione monoethylene acetal are dissolved in 200ml toluene) of alcohol single ketal, time for adding is 10min is heated to 82 DEG C, back flow reaction 6h, after being down to room temperature after being added dropwise, total overall reaction liquid is added in dilute hydrochloric acid (50mL concentrated hydrochloric acid is dissolved in 200g ice water), stirs ten minutes, liquid separation, water phase is thrown aside, and is obtained to protecting group benzyl ring by 0 DEG C of temperature control Hexanol ethylene glycol single ketal crude product 95g;
Step 4: take 1000mL there-necked flask, be added it is above-mentioned to protecting group phenylcyclohexanol ethylene glycol single ketal crude product 95g, 400ml toluene, 5g p-methyl benzenesulfonic acid, 110 DEG C of back flow reaction 6h, washing, revolving obtain trimethylsiloxy group phenyl cyclohexene second Glycol single ketal crude product 97g;
Step 5: above-mentioned trimethylsiloxy group phenyl cyclohexene ethylene glycol single ketal crude product 97g is dissolved in 400mL ethyl alcohol In, 1.0g palladium-carbon catalyst is added, under the conditions of an atmospheric pressure, 30 DEG C, is passed through hydrogen, reacts 6h, Filtration of catalyst, Obtain trimethylsiloxy group cyclohexanone ethylene ketal crude product;
Step 6: 50mL concentrated hydrochloric acid and 180mL water is added in above-mentioned trimethylsiloxy group cyclohexanone ethylene ketal crude product Mixed solution in, in 100 DEG C of reaction 2h, 4- (4- hydroxy phenyl) cyclohexanone solid 46.74g is can be obtained in post-processing recrystallization, Purity is 99.5%.
In terms of to trimethylsiloxy group bromobenzene, five step total recoverys are 82%, and in terms of p bromophenol, six step total recoverys are 77.5%.
Embodiment 2
A kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone:
Step 1: pyridine 237.3g is placed in 3000ml there-necked flask by p bromophenol 346g, 1038mL toluene is added, fills Divide and stir, under the conditions of ice salt bath, the toluene solution (182.6g dimethoxym ethane is dissolved in 913mL toluene) of dimethoxym ethane is added dropwise, temperature control is not More than 50 DEG C, after 60min is dripped, there is white salt in system, is stirred to react 1h in 30 DEG C, and 600ml water is added into system, stirs After mixing 30min, post-processing can obtain the colourless transparent liquid 417.07g to methoxy methoxy bromide benzene shown in formula I, yield 96.1%, purity 99.5%;
Step 2: magnesium chips 7.56g is placed in 500mL there-necked flask under nitrogen protection, 0 DEG C of ice salt bath, it will be to above-mentioned preparation What is obtained is dissolved in 148mL ether methoxy methoxy bromide benzene 65.1g, is added dropwise in there-necked flask, rear water-bath is added dropwise in 30min 30 DEG C, 2.5h is stirred, is obtained to methoxy methoxy base magnesium bromide crude product solution;
Step 3: under nitrogen protection, to dropwise addition cyclohexanedione ethylene glycol in methoxy methoxy base magnesium bromide crude product solution The toluene solution (60.84g1,4- cyclohexanedione monoethylene acetal are dissolved in 127ml tetrahydrofuran) of single ketal, time for adding is 10min is heated to 66 DEG C, back flow reaction 10h, after being down to room temperature after being added dropwise, total overall reaction liquid is added in dilute sulfuric acid (the 51g concentrated sulfuric acid is dissolved in 100g ice water), stirs ten minutes, liquid separation, water phase is thrown aside, and is obtained to methoxy methoxy base benzene by 10 DEG C of temperature control Cyclohexanol ethylene glycol single ketal crude product 89g;
Step 4: taking 1000mL there-necked flask, it is added above-mentioned to methoxy methoxy base phenylcyclohexanol ethylene glycol single ketal crude product 89g, 180ml hexamethylene, 3.7g methanesulfonic acid, 80 DEG C of back flow reaction 8h, washing, revolving are obtained to methoxy methoxy base phenyl cyclohexene Ethylene glycol single ketal 85g;
Step 5: above-mentioned trimethylsiloxy group phenyl cyclohexene ethylene glycol single ketal crude product 85g is dissolved in 170mL methanol In, 3.7g Raney's nickel catalyst is added, under the conditions of three atmospheric pressure, 50 DEG C, is passed through hydrogen, reacts 8h, be filtered to remove catalysis Agent is obtained to methoxy methoxy base phenylcyclohexyl ethylene glycol single ketal crude product solution;
Step 6: the dense sulphur of 30.1g is added to methoxy methoxy base phenyl cyclohexene ethylene glycol single ketal crude product solution by above-mentioned In the mixed solution of acid and 120mL water, 4- (4- hydroxy phenyl) cyclohexanone solid is can be obtained in 0 DEG C of reaction 8h, post-processing recrystallization 43.8g, purity 99.7%.
In terms of to methoxy methoxy bromide benzene, five step total recoverys are 76.88%, and in terms of p bromophenol, six step total recoverys are 80.00%.
Embodiment 3
A kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone:
Step 1: sodium carbonate 424g is placed in 3000ml there-necked flask by p bromophenol 346g, bis- chloroethene of 1730mL is added Alkane is sufficiently stirred, and under the conditions of ice salt bath, the dichloroethane solution of dihydropyran is added dropwise, and (252.4g dihydropyran alkane is dissolved in 758mL In dichloroethanes), temperature control is no more than 40 DEG C, and after 50min is dripped, white salt occurs in system, is stirred to react 4h, Xiang Ti in 30 DEG C 600ml water is added in system, after stirring 30min, post-processing can obtain the colorless and transparent of p bromophenol tetrahydropyranyl ethers shown in formula II Liquid 474.72g, yield 91.6%, purity 99.4%;
Step 2: magnesium chips 8.1g is placed in 500mL there-necked flask under nitrogen protection, 30 DEG C of water-bath, will be prepared into above-mentioned To p bromophenol tetrahydropyranyl ethers 77.4g be dissolved in 253mL methyl tertiary butyl ether(MTBE), be added dropwise in there-necked flask, 50min is dripped 80 DEG C of water-bath after finishing stirs 1.5h, obtains p bromophenol tetrahydropyranyl ethers magnesium bromide crude product;
Step 3: under nitrogen protection, cyclohexanedione second two is added dropwise into p bromophenol tetrahydropyranyl ethers magnesium bromide crude product The dioxane solution (56.16g1,4- cyclohexanedione monoethylene acetal are dissolved in 170mL dioxane) of alcohol single ketal is added dropwise Time is 20min, and 100 DEG C, back flow reaction 4h, after being down to room temperature are heated to after being added dropwise, and dilute salt is added in total overall reaction liquid In acid (132mL concentrated hydrochloric acid is dissolved in 100g ice water), 20 DEG C of temperature control, stir ten minutes, liquid separation, water phase is thrown aside, and oxinane is obtained Ether phenylcyclohexanol ethylene glycol single ketal crude product 98g;
Step 4: taking 1000mL there-necked flask, above-mentioned tetrahydropyranyl ethers phenylcyclohexanol ethylene glycol single ketal crude product is added 98g, 290ml n-hexane, the 8.6g concentrated sulfuric acid, 70 DEG C of back flow reaction 12h, washing, revolving obtain tetrahydropyranyl ethers phenyl cyclohexene Ethylene glycol single ketal 94g;
Step 5: above-mentioned tetrahydropyranyl ethers phenyl cyclohexene ethylene glycol single ketal crude product 94g is dissolved in 400mL petroleum ether In, 8.5g ruthenium C catalyst is added, under the conditions of five atmospheric pressure, 80 DEG C, is passed through hydrogen, reacts 2h, Filtration of catalyst, Obtain tetrahydropyranyl ethers phenylcyclohexyl ethylene glycol single ketal crude product solution;
Step 6: 60mL concentrated hydrochloric acid and 145mL is added in above-mentioned tetrahydropyranyl ethers phenylcyclohexyl ethylene glycol crude product solution In the mixed solution of water, 4- (4- hydroxy phenyl) cyclohexanone solid 46.67g is can be obtained in 50 DEG C of reaction 4h, post-processing recrystallization, pure Degree is 99.6%.
In terms of p bromophenol tetrahydropyranyl ethers, five step total recoverys are 81%, and in terms of p bromophenol, six step total recoverys are 75%.
Embodiment 4
A kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone:
Step 1: sodium hydroxide 160g is placed in 3000ml there-necked flask by p bromophenol 346g, 1384mL ether is added, It is sufficiently stirred, under the conditions of ice salt bath, diethyl ether solution (the 391.9g tert-butyldimethylsilyl chloride silicon of tert-butyl chloro-silicane is added dropwise Alkane is dissolved in 1568mL ether), temperature control is no more than 30 DEG C, and after 60min is dripped, white salt occurs in system, anti-in 30 DEG C of stirrings 5h is answered, 600ml water is added into system, after stirring 30min, post-processing can be obtained shown in formula III to tertiary butyl dimethyl Si base The colourless transparent liquid 543.20g of bromobenzene, yield 94.8%, purity 99.7%;
Step 2: magnesium chips 8.7g is placed in 500mL there-necked flask under nitrogen protection, 20 DEG C of water-bath, will be prepared into above-mentioned To tertiary butyl dimethyl Si bromide benzene 86.1g is dissolved in 378mL dioxane, be added dropwise in there-necked flask, 60min be added dropwise After 70 DEG C of water-bath, stir 1.5h, obtain to tertiary butyl dimethyl Si base magnesium bromide crude product;
Step 3: under nitrogen protection, to dropwise addition cyclohexanedione second in tertiary butyl dimethyl Si base magnesium bromide crude product The diethyl ether solution (56.16g1,4- cyclohexanedione monoethylene acetal are dissolved in 283ml ether) of glycol single ketal, time for adding is 30min is heated to 35 DEG C, back flow reaction 12h, after being down to room temperature after being added dropwise, total overall reaction liquid is added in dilute hydrochloric acid (165mL concentrated hydrochloric acid is dissolved in 200g ice water), stirs ten minutes, liquid separation, water phase is thrown aside, and is obtained to tert-butyl diformazan by 30 DEG C of temperature control Base siloxy phenylcyclohexanol ethylene glycol list protects ketone crude product 106g;
Step 4: taking 1000mL there-necked flask, it is added above-mentioned to tertiary butyl dimethyl Si base phenylcyclohexanol ethylene glycol list Guarantor ketone 106g, 475ml toluene, 18.9g p-methyl benzenesulfonic acid, 110 DEG C of back flow reaction 4h, washing, revolving are obtained to tert-butyl diformazan Base siloxy phenyl cyclohexene ethylene glycol list protects ketone crude product 102g;
Step 5: being dissolved in above-mentioned to tertiary butyl dimethyl Si base phenyl cyclohexene ethylene glycol list guarantor ketone crude product 102g In 485mL ethyl alcohol, 18.9g palladium-carbon catalyst is added, under the conditions of three atmospheric pressure, 20 DEG C, is passed through hydrogen, reacts 12h, filtering Catalyst is removed, obtains and ketone crude product solution is protected to tertiary butyl dimethyl Si base phenylcyclohexyl ethylene glycol list;
Step 6: protecting the addition of ketone crude product solution to tertiary butyl dimethyl Si base phenylcyclohexyl ethylene glycol list for above-mentioned In the mixed solution of 45mL concentrated hydrochloric acid and 160mL water, 4- (4- hydroxy phenyl) ring is can be obtained in 70 DEG C of reaction 3h, post-processing recrystallization Hexanone solid 46.97g, purity 99.7%.
In terms of p bromophenol tetrahydropyranyl ethers, five step total recoverys are 82.4%, and in terms of p bromophenol, six step total recoverys are 78.2%.
As long as acid binding agent, the first solvent, the second solvent, third solvent, the 4th solvent, the 5th solvent and dehydrating agent take off It protects reagent, acid hydrolysis solution in currently preferred range, can reach the identical technology effect in 1-4 of the embodiment of the present invention Fruit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (10)

1. a kind of preparation method of 4- (4- hydroxy phenyl) cyclohexanone, which comprises the steps of:
Step 1: p bromophenol is reacted with hydroxy-protecting agent, obtain to protecting group bromobenzene;
Step 2: carrying out grignard reaction to protecting group bromobenzene and magnesium metal, obtain to protecting group phenyl-magnesium-bromide;
Step 3: carry out coupling reaction to protecting group phenyl-magnesium-bromide and Isosorbide-5-Nitrae-cyclohexanedione monoethylene acetal, acidolysis is obtained pair Protecting group phenylcyclohexanol ethylene glycol single ketal;
Step 4: carry out dehydration under dehydrating agent catalytic action to protecting group phenylcyclohexanol ethylene glycol single ketal, obtain pair Protecting group phenyl cyclohexene ethylene glycol single ketal;
Step 5: carrying out catalytic hydrogenation reaction to protecting group phenyl cyclohexene ethylene glycol single ketal and hydrogen, obtain to protecting group benzene Butylcyclohexyl ethylene glycol single ketal;
Step 6: being reacted with deprotection agent protecting group phenylcyclohexyl ethylene glycol single ketal, 4- (4- hydroxy phenyl) hexamethylene is obtained Ketone.
2. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as described in claim 1, which is characterized in that including walking as follows It is rapid:
Step 1: p bromophenol and acid binding agent are added in the first solvent, it is uniformly mixed, under inert gas protection, hydroxyl is added dropwise Base protection agent solution is obtained in 0-50 DEG C of reaction 2-5h to protecting group bromobenzene;
Step 2: protecting group bromobenzene is added in the second solvent by described, obtain to protecting group bromobenzene solution, in inert gas shielding Under, it is added dropwise in magnesium metal, in 0-80 DEG C of reaction 1-3h, is obtained to protecting group phenyl-magnesium-bromide;
Step 3: Isosorbide-5-Nitrae-cyclohexanedione monoethylene acetal is added in second solvent, Isosorbide-5-Nitrae-cyclohexanedione list second two is obtained Alcohol ketal solution is added dropwise to described in protecting group phenyl-magnesium-bromide under inert gas protection, is reacted in 30-100 DEG C 4-12h is added acid hydrolysis solution and obtains in 0-30 DEG C of progress acidolysis to protecting group phenylcyclohexanol ethylene glycol single ketal;
Step 4: protecting group phenylcyclohexanol ethylene glycol single ketal is added in third solvent by described, dehydrating agent, reflux is added It is dehydrated 4-12h, is obtained to protecting group phenyl cyclohexene ethylene glycol single ketal;
Step 5: protecting group phenyl cyclohexene ethylene glycol single ketal is added in the 4th solvent by described, catalyst is added, is passed through Hydrogen under conditions of reaction pressure is 1-5 atmospheric pressure, reacts 2-12h, obtains to protecting group phenylcyclohexyl second in 20-80 DEG C Glycol single ketal;
Step 6: protecting group phenylcyclohexyl ethylene glycol single ketal is added in the 5th solvent by described, deprotection agent, 0- is added 100 DEG C of reaction 2-8h obtain 4- (4- hydroxy phenyl) cyclohexanone.
3. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as claimed in claim 1 or 2, which is characterized in that the hydroxyl Protective agent is dihydropyran, dimethoxym ethane, trim,ethylchlorosilane or tert-butyl chloro-silicane;And/or
The acid binding agent is at least one in pyridine, triethylamine, imidazoles, sodium carbonate, potassium carbonate, sodium hydroxide or potassium hydroxide Kind;And/or
The catalyst is at least one of Raney's nickel, palladium charcoal or ruthenium carbon.
4. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as claimed in claim 2, which is characterized in that in step 1, drop It is 50-60min between added-time;And/or
In step 2, time for adding 30-60min;And/or
In step 3, time for adding 10-30min.
5. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as claimed in claim 2, which is characterized in that first solvent For at least one of toluene, methylene chloride, chloroform, carbon tetrachloride, dichloroethanes, tetrahydrofuran or ether;And/or
Second solvent is at least one of ether, tetrahydrofuran, dioxane, toluene or methyl tertiary butyl ether(MTBE);And/or
The third solvent is at least one of hexamethylene, n-hexane or toluene;And/or
4th solvent is at least one of methanol, ethyl alcohol, petroleum ether or tetrahydrofuran;And/or
5th solvent is at least one of methanol, ethyl alcohol, methylene chloride, toluene, acetic acid or trifluoroacetic acid.
6. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as claimed in claim 2, which is characterized in that in step 1, institute The molar ratio for stating p bromophenol, the hydroxy-protecting agent and the acid binding agent is 1:1-1.5:1.2-2.0;And/or
In step 2, the molar ratio to protecting group bromobenzene and the magnesium metal is 1:1.05-1.2;And/or
In step 3, described is 1:1.1- to protecting group bromobenzene and the Isosorbide-5-Nitrae-cyclohexanedione ethylene glycol single ketal molar ratio 1.3。
7. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as claimed in claim 2, which is characterized in that in step 1, institute The solvent for stating hydroxyl protection agent solution is in toluene, methylene chloride, chloroform, carbon tetrachloride, dichloroethanes, tetrahydrofuran or ether At least one, and the volume of solvent is 2-5 times of hydroxy-protecting agent quality, wherein the unit of volume is milliliter, the list of quality Position is gram;And/or
In step 3, the acid hydrolysis solution is the aqueous solution of hydrogen chloride, sulfuric acid, formic acid or ammonium chloride, the quality of the acidolysis solution Concentration is 20-70%, the molar ratio to hydrogen chloride, sulfuric acid, formic acid or ammonium chloride in protecting group bromobenzene and the acid hydrolysis solution For 1:1.5-2.5.
8. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as claimed in claim 2, which is characterized in that in step 4, institute Stating dehydrating agent is at least one of the concentrated sulfuric acid, p-methyl benzenesulfonic acid, methanesulfonic acid or highly acidic resin, and the additional amount of the dehydrating agent is The 5-20% to protecting group bromobenzene quality;And/or
In step 5, the additional amount of the catalyst is the 1-20% to protecting group bromobenzene quality.
9. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as claimed in claim 2, which is characterized in that in step 6, institute The aqueous solution that deprotection agent is acid is stated, the acid is formic acid, glacial acetic acid, trifluoroacetic acid, hydrogen chloride, the concentrated sulfuric acid, p-methyl benzenesulfonic acid Or it is one or more of in methanesulfonic acid, the mass concentration of the deprotection agent is 20-50%, described sour and described to protecting group bromobenzene Molar ratio be 1-2:1.
10. the preparation method of 4- (4- hydroxy phenyl) cyclohexanone as claimed in claim 2, which is characterized in that step 1 to step In rapid six, the addition volume respectively correspondence of first solvent, the second solvent, third solvent, the 4th solvent and the 5th solvent 2-5 times of dissolved substrate quality, wherein the unit of volume is milliliter, and the unit of quality is gram.
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Application publication date: 20190719