WO2014061570A1 - 新規脂環式ジオール化合物、及びその製造方法 - Google Patents
新規脂環式ジオール化合物、及びその製造方法 Download PDFInfo
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- WO2014061570A1 WO2014061570A1 PCT/JP2013/077710 JP2013077710W WO2014061570A1 WO 2014061570 A1 WO2014061570 A1 WO 2014061570A1 JP 2013077710 W JP2013077710 W JP 2013077710W WO 2014061570 A1 WO2014061570 A1 WO 2014061570A1
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- 0 CC(C)(C(CC1)CCC1(C)C(O*)=O)C(O*)=O Chemical compound CC(C)(C(CC1)CCC1(C)C(O*)=O)C(O*)=O 0.000 description 1
- FVCWVUIBSFRTLP-UHFFFAOYSA-N CC(C)(CO)C1CCC(C)(CO)CC1 Chemical compound CC(C)(CO)C1CCC(C)(CO)CC1 FVCWVUIBSFRTLP-UHFFFAOYSA-N 0.000 description 1
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- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
- C07C29/136—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH
- C07C29/147—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of carboxylic acids or derivatives thereof
- C07C29/149—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of carboxylic acids or derivatives thereof with hydrogen or hydrogen-containing gases
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- C07C35/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring monocyclic
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- C07C31/13—Monohydroxylic alcohols containing saturated rings
- C07C31/133—Monohydroxylic alcohols containing saturated rings monocyclic
- C07C31/135—Monohydroxylic alcohols containing saturated rings monocyclic with a five or six-membered rings; Naphthenic alcohols
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- C07C67/14—Preparation of carboxylic acid esters from carboxylic acid halides
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- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
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- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
- C07C29/136—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH
- C07C29/147—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of carboxylic acids or derivatives thereof
Definitions
- the present invention relates to a novel alicyclic diol compound having a cyclohexane ring and a method for producing the same.
- Polyester resins synthesized from cycloaliphatic dicarboxylic acids and cycloaliphatic diols have excellent transparency, heat resistance, weather resistance, gas barrier properties, and optical properties, so optical materials, electronic information materials, medical device materials, etc. Can be used for applications.
- 1,4-cyclohexanedicarboxylic acid (1,4-CHDA) as the alicyclic dicarboxylic acid
- 1,4-cyclohexanedimethanol (1,4-CHDM) as the alicyclic diol
- a superior polyester resin for example, see Patent Document 1
- a conductive polyester with a small amount of released gas for example, see Patent Document 2
- a polyester suitable for medical use for example, see Patent Document 3
- tricyclo alicyclic dicarboxylic acid [3.3.1.1 3, 7] decane dicarboxylic acid, optically using a tricyclo [3.3.1.1 3, 7] decane diol alicyclic diols different
- a polyester resin having a low isotropic property and excellent moldability is synthesized (for example, see Patent Document 4).
- An object of the present invention is to provide a novel alicyclic diol compound having a cyclohexane ring and a method for producing the same.
- the present inventor has studied a method for producing a novel alicyclic diol compound represented by the following formula (1) from 4-isopropenyl-1-methyl-1-cyclohexene represented by the following formula (4).
- HF hydrogen fluoride
- 4-isopropenyl-1-methyl-1-cyclohexene represented by the following formula (4) is reacted with carbon monoxide
- the obtained alicyclic dicarboxylic acid fluoride represented by the following formula (3) was reacted with alcohol to obtain an alicyclic dicarboxylic acid ester compound represented by the following formula (2)
- the following formula (2) It was found that a novel alicyclic diol compound represented by the following formula (1) can be produced by reducing the alicyclic dicarboxylic acid ester compound represented by:
- each R is independently an alkyl group having 1 to 4 carbon atoms.
- the present invention is as follows.
- the novel alicyclic diol compound represented by the formula (1) of the present invention can be used as a raw material for a polyester resin, for example. Moreover, since the manufacturing method of this invention uses the biomass-derived compound represented by Formula (4) as a raw material, it can be said that it is an environmentally friendly manufacturing method from a carbon neutral viewpoint.
- Example 1 The result of DEPT45 ° -NMR measurement of the product obtained in Example 1 is shown.
- the result of DEPT90 ° -NMR measurement of the product obtained in Example 1 is shown.
- the result of DEPT135 ° -NMR measurement of the product obtained in Example 1 is shown.
- Carbon i. Of the product obtained in Example 1 g. -NMR measurement results are shown.
- 1 shows the results of INADEQUAT-NMR measurement of the product obtained in Example 1.
- FIG. 6 is an enlarged view of a measurement result of a 15 to 50 ppm portion in FIG.
- the novel alicyclic diol compound of this embodiment is a compound represented by the following formula (1).
- Such an alicyclic diol compound represented by the formula (1) can be used, for example, as a raw material of a polyester resin, and by using the alicyclic diol compound, optical properties and heat resistance can be improved. Excellent materials can be produced. Although it does not specifically limit as a use of the material which has such a characteristic, For example, optical material uses, such as a lens, are mentioned.
- the method for producing the novel alicyclic diol compound of this embodiment includes the following steps (a) to (c).
- (A) 4-isopropenyl-1-methyl-1-cyclohexene represented by the following formula (4) is reacted with carbon monoxide in the presence of hydrogen fluoride (hereinafter also referred to as “HF”) to form the following formula:
- a step of obtaining the alicyclic dicarboxylic acid fluoride represented by (3) hereinafter sometimes abbreviated as “carbonylation step”).
- (B) a step of reacting the obtained alicyclic dicarboxylic acid fluoride represented by the following formula (3) with an alcohol to obtain an alicyclic dicarboxylic acid ester compound represented by the following formula (2) (hereinafter referred to as “ester” It may be abbreviated as “Chemical process”).
- (C) a step of reducing the obtained alicyclic dicarboxylic acid ester compound represented by the following formula (2) to obtain an alicyclic diol compound represented by the following formula (1) (hereinafter referred to as “reduction step”) Abbreviated).
- each R is independently an alkyl group having 1 to 4 carbon atoms.
- step (a) the carbonylation reaction of 4-isopropenyl-1-methyl-1-cyclohexene represented by the following formula (4) is preferably carried out in the presence of HF and under pressure of carbon monoxide.
- step (a) an alicyclic carbonyl compound represented by the following formula (3) (hereinafter also referred to as “alicyclic dicarboxylic acid fluoride”) is obtained.
- various by-products including other isomers may be contained.
- Carbon monoxide used in the carbonylation step may contain an inert gas such as nitrogen or methane.
- the carbonylation step is carried out in the range of preferably 0.5 to 5 MPa, more preferably 1 to 4 MPa, and even more preferably 1.5 to 3 MPa as the carbon monoxide partial pressure. If the carbon monoxide partial pressure is higher than 0.5 MPa, the carbonylation reaction proceeds sufficiently, side reactions such as disproportionation and polymerization do not occur simultaneously, and the alicyclic dicarboxylic acid which is the target product in a high yield. Fluoride can be obtained. Further, the carbon monoxide partial pressure is preferably 5 MPa or less from the viewpoint of equipment load.
- substantially anhydrous HF means HF having a water concentration of 200 ppm or less.
- the amount of HF to be used is preferably 4 to 30 mol times, more preferably 7 to 20 mol times, still more preferably 10 times the raw material 4-isopropenyl-1-methyl-1-cyclohexene. ⁇ 15 mole times.
- the amount of HF used is 4 mol times or more, the carbonylation reaction proceeds efficiently, side reactions such as disproportionation and polymerization can be suppressed, and the target alicyclic dicarboxylic acid fluoride can be obtained in high yield. Obtainable. Moreover, it is preferable that it is 30 mol times from the viewpoint of raw material cost and productivity, and, as for the usage-amount of this HF, it is more preferable that it is 15 mol times or less.
- the form of the carbonylation reaction in step (a) is not particularly limited, and any form such as a batch system, a semi-continuous system, or a continuous system may be used.
- the reaction temperature of the carbonylation reaction in step (a) is preferably in the range of ⁇ 50 ° C. to 30 ° C., more preferably ⁇ 40 ° C. to 0 ° C., and still more preferably ⁇ 30 to ⁇ 10 ° C. If the reaction temperature of the carbonylation reaction is 30 ° C. or less, particularly ⁇ 10 ° C. or less, the selectivity tends to be good.
- the carbonylation reaction in step (a) is preferably performed at ⁇ 50 ° C. or higher from the viewpoint of reaction rate.
- the reaction pressure of the carbonylation reaction in step (a) is preferably in the range of 0.6 to 5.0 MPa, more preferably 1.1 to 4.0 MPa, and still more preferably 1.6 to 3.0 MPa.
- the esterification step is a step of reacting the alicyclic dicarboxylic acid fluoride produced in the carbonylation step with an alcohol having 1 to 4 carbon atoms to obtain an alicyclic dicarboxylic acid ester compound.
- the reaction solution generated in the carbonylation step may be used as it is.
- a method in which a predetermined amount of alcohol is added to the reaction solution produced in the carbonylation step in the esterification step is preferable.
- esterification may be performed by adding an alcohol to the reaction solution.
- generated by carbonylation reaction is refine
- each R is independently an alkyl group having 1 to 4 carbon atoms.
- Specific alcohol used in the esterification step is not particularly limited, and examples thereof include methanol, ethanol, n-propanol, isopropanol, n-butyl alcohol, isobutyl alcohol, and tert-butyl alcohol. Among these, methanol or ethanol is preferable from the viewpoint of reactivity.
- the alcohol may be used alone or in combination of two or more.
- the amount of alcohol used is preferably 1.0 to 2.5 moles, more preferably 1. 5 mol times the amount of the raw material 4-isopropenyl-1-methyl-1-cyclohexene in the carbonylation step. It is 2 to 2.3 mole times, more preferably 1.5 to 2.0 mole times. If the amount of the alcohol used is 1.0 mol times or more, it is preferable because the remaining amount of the unreacted alicyclic dicarboxylic acid fluoride is small and the apparatus corrosion in the subsequent process is small, and the intermolecular dehydration of the alcohol. From the viewpoint of suppressing device corrosion due to water generated by the reaction, the amount of the alcohol used is preferably 2.5 moles or less.
- the reaction temperature in the esterification step is preferably from ⁇ 40 ° C. to 20 ° C., more preferably from ⁇ 30 ° C. to 10 ° C., from the viewpoint of inhibiting the decomposition of the alicyclic dicarboxylic acid ester compound represented by the above formula (2). More preferably, it is ⁇ 30 ° C. to 0 ° C.
- the esterification rate can be increased and the yield can be improved.
- this reaction temperature 20 degrees C or less while suppressing decomposition
- the esterification step is preferably performed at normal pressure.
- the reduction method of the alicyclic dicarboxylic acid ester compound represented by the formula (2) obtained in the esterification step (hereinafter also referred to as “alicyclic dicarboxylic acid ester compound”) is usually performed.
- Any method can be used as long as it is a method used for reducing a carbonyl compound to an alcohol, and the method is not particularly limited.
- the reduction method for example, any of hydride reduction, reduction method using metal and metal salt, reduction method by catalytic hydrogenation, etc. described in the fifth edition, Experimental Chemistry Course Vol. 14 (Maruzen Co., Ltd.), pages 11 to 27 can be used.
- a reduction method by catalytic hydrogenation is preferable from the viewpoint of economy.
- each R is independently an alkyl group having 1 to 4 carbon atoms.
- Catalytic hydrogenation catalyst The catalyst used for the catalytic hydrogenation of the alicyclic dicarboxylic acid ester compound (hereinafter also referred to as “catalytic hydrogenation catalyst”) is not particularly limited as long as it is a normal catalyst used for the hydrogenation of carbonyl compounds. A catalyst containing at least one selected from Group 8 to 11 metals is preferred.
- money for example, the contact containing at least 1 sort (s) chosen from iron, cobalt, nickel, copper, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, and gold
- s 1 sort
- the catalytic hydrogenation catalyst may be a solid catalyst or a homogeneous catalyst, but is preferably a solid catalyst from the viewpoint of separability from the reactants.
- the solid catalyst is not particularly limited, and examples thereof include an unsupported metal catalyst and a supported metal catalyst.
- the unsupported metal catalyst is preferably a Raney catalyst such as Raney nickel, Raney cobalt, Raney copper, or an oxide or colloid catalyst such as platinum, palladium, rhodium, or ruthenium.
- a Raney catalyst such as Raney nickel, Raney cobalt, Raney copper, or an oxide or colloid catalyst such as platinum, palladium, rhodium, or ruthenium.
- the supported metal catalyst is not particularly limited, but for example, iron, cobalt, nickel, copper, ruthenium, rhodium, palladium, magnesia, zirconia, ceria, diatomaceous earth, activated carbon, alumina, silica, zeolite, or titania on a support.
- supported metal catalysts in which at least one of silver, osmium, iridium, platinum, and gold is supported or mixed.
- copper-chromium catalyst (Adkins catalyst), copper-zinc catalyst or supported copper catalyst such as copper-iron, supported platinum catalyst such as Pt / C or Pt / alumina, supported palladium catalyst such as Pd / C or Pd / alumina.
- a supported ruthenium catalyst such as Ru / C or Ru / alumina or a supported rhodium catalyst such as Rh / C or Rh / alumina is preferred.
- a catalyst containing at least one selected from the group consisting of nickel and copper is more preferable in terms of reaction activity.
- the amount of the catalytic hydrogenation catalyst used varies depending on the type of the catalyst, but is preferably 1 to 100 parts by mass, more preferably 3 to 30 parts per 100 parts by mass of the alicyclic dicarboxylic acid ester compound as the raw material. Part by mass, more preferably 5 to 20 parts by mass.
- the reduction step can be performed without a solvent, but a solvent may be used.
- the solvent used in the reduction step is not particularly limited.
- organic acids such as water, formic acid, and acetic acid
- aromatic compounds such as benzene, o-dichlorobenzene, toluene, and xylene
- carbonization such as hexane, heptane, and cyclohexane Hydrogens
- alcohols such as methanol, ethanol, isopropyl alcohol, t-butyl alcohol, ethylene glycol, and diethylene glycol
- ethers such as dioxane, tetrahydrofuran, dimethoxyethane, and diglyme, and mixtures thereof.
- no solvent aromatic compounds such as benzene, o-dichlorobenzene, toluene, xylene; hydrocarbons such as hexane, heptane, cyclohexane; methanol, ethanol, isopropyl alcohol, t-butyl alcohol, ethylene glycol, It is preferable to use alcohols such as diethylene glycol; ethers such as dioxane, tetrahydrofuran, dimethoxyethane, diglyme, or a mixture thereof.
- the amount of the solvent used is preferably 0 to 30 times by mass, more preferably 0 to 20 masses based on the alicyclic dicarboxylic acid ester compound represented by the formula (2) obtained in the esterification process. Double, more preferably 0 to 10 mass times.
- the pressure of hydrogen in the reduction step is preferably as high as possible from the viewpoint of moving the reaction equilibrium to the alcohol side, but is preferably 1 to 30 MPa, more preferably 5 to 25 MPa, more preferably 10 to 20 MPa in consideration of equipment costs. preferable.
- the reaction temperature in the reduction step is preferably 100 ° C. or higher, more preferably 150 ° C. or higher, and further preferably 180 ° C. or higher from the viewpoint of obtaining a sufficient reaction rate. Moreover, the reaction temperature in the reduction step is from the viewpoint of suppressing the transesterification reaction between the alicyclic diol compound represented by the formula (1) to be generated and the alicyclic dicarboxylic acid ester compound represented by the formula (2). 300 ° C. or lower, preferably 290 ° C. or lower, more preferably 280 ° C. or lower.
- the reaction pressure in the reduction step is preferably 1.5 to 30 MPa, more preferably 6 to 25 MPa, and further preferably 10 to 20 MPa.
- the form of the reduction process is not particularly limited.
- the form of the reduction step is not particularly limited as long as the catalytic hydrogenation reaction is possible, and may be a commonly used known form.
- the reactor for performing the reduction process is not particularly limited.
- a suspension bed reactor in which a catalyst is fluidized with a fluid to perform a catalytic hydrogenation reaction, and catalytic hydrogenation is performed by filling and fixing the catalyst and supplying the fluid. Examples thereof include a fixed bed reactor for carrying out the reaction.
- alcohol having 1 to 4 carbon atoms may be by-produced during the reaction.
- the reduction step can be performed while these by-products are present, but can also be performed while removing these by-products continuously or intermittently during the reaction.
- the manufacturing method of this embodiment may include other steps in addition to the steps (a) and (b) described above. Although it does not specifically limit as another process, For example, a liquid extraction process, a catalyst collection
- the isomers refer to structural isomers having different carbonyl group insertion positions.
- GC-MS As a GC-MS measurement apparatus, POLARIS Q of a GC-MS spectrum apparatus manufactured by Thermo ELECTRON was used.
- Example 1 Production of methyl-4- (1-methoxy-2-methyl-1-oxopropan-2-yl) -1-methylcyclohexanecarboxylate ((a) carbonylation step and (b) esterification step).
- Carbonylation step The carbonylation process was performed as follows using a stainless steel autoclave having an internal volume of 500 ml, equipped with a Nack drive type stirrer, three inlet nozzles at the top and one extraction nozzle at the bottom, and the internal temperature could be controlled by a jacket. .
- the inside of the autoclave was replaced with carbon monoxide. Thereafter, 230 g (11.5 mol) of anhydrous hydrogen fluoride was introduced into the autoclave, and the liquid temperature inside the autoclave was adjusted to ⁇ 27 ° C. Thereafter, the inside of the autoclave was pressurized to 2 MPa with carbon monoxide.
- the reaction solution was extracted from the bottom of the autoclave into ice water, and the oil phase and the aqueous phase were separated. Thereafter, the oil phase was washed twice with 100 ml of 2% aqueous sodium hydroxide solution and twice with 100 ml of distilled water, and dehydrated with 10 g of anhydrous sodium sulfate. After dehydration, the obtained liquid was analyzed by gas chromatography. As a result, the yield of the dicarboxylic acid ester compound was 26.6 mol% (based on 4-isopropenyl-1-methyl-1-cyclohexene).
- reaction solution was filtered to remove the catalyst, methyl-4- (1-methoxy-2-methyl-1-oxopropan-2-yl) -1-methylcyclohexanecarboxylate 0.8%, total hydrogenated product 19.
- FIG. 1 shows the results of DEPT 45 ° -NMR measurement. From FIG. 1, the peak disappearance of the quaternary carbon atoms No. 4 and No. 6 was found.
- FIG. 2 shows the results of DEPT 90 ° -NMR measurement. From FIG. 2, it was found that the peak No. 7 that is a tertiary carbon atom was detected strongly.
- FIG. 3 shows the results of DEPT135 ° -NMR measurement. It was found that secondary carbon atoms No. 2, No. 5, No. 8, and No. 9 were detected downward.
- FIG. 4 shows Carbon i. g. -Shows the NMR measurement results. From FIG. 4, the carbon number was confirmed.
- 5 and 6 show the results of the INADEQUAT-NMR measurement (FIG. 6 is an enlarged view of the measurement results at the 15 to 50 ppm portion in FIG. 5). From FIG. 5 and FIG. 6, the correlation of the direct bond between carbon and carbon was found.
- the main component of the product obtained in Example 1 was 2- (4- (hydroxymethyl) -4-methylcyclohexyl) -2-methylpropan-1-ol. Identified.
- novel alicyclic diol compound obtained in the present invention is useful as a raw material for producing various industrial chemical raw materials, optical functional materials and electronic functional materials.
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Abstract
Description
得られた下記式(3)で表わされる脂環式ジカルボン酸フロライドをアルコールと反応させ、下記式(2)で表される脂環式ジカルボン酸エステル化合物を得る工程と、
得られた下記式(2)で表される脂環式ジカルボン酸エステル化合物を還元して下記式(1)で表される新規脂環式ジオール化合物を得る工程と、
を含む、脂環式ジオール化合物の製造方法。
(a)下記式(4)で表される4-イソプロペニル-1-メチル-1-シクロヘキセンをフッ化水素(以下「HF」とも記す。)の存在下、一酸化炭素と反応させて下記式(3)で表される脂環式ジカルボン酸フロライドを得る工程(以下「カルボニル化工程」と略すこともある)。
(b)得られた下記式(3)で表わされる脂環式ジカルボン酸フロライドをアルコールと反応させ、下記式(2)で表される脂環式ジカルボン酸エステル化合物を得る工程、(以下「エステル化工程」と略すこともある)。
(c)得られた下記式(2)で表される脂環式ジカルボン酸エステル化合物を還元して下記式(1)で表される脂環式ジオール化合物を得る工程(以下「還元工程」と略すこともある)。
工程(a)において、下記式(4)で表される4-イソプロペニル-1-メチル-1-シクロヘキセンのカルボニル化反応は、HFの存在下で一酸化炭素の加圧下に実施することが好ましい。工程(a)により、下記式(3)で表される脂環式カルボニル化合物(以下「脂環式ジカルボン酸フロライド」とも記す。)が得られる。工程(a)におけるカルボニル化反応生成物中には、種々の副生物(他の異性体を含む)が含まれていてもよい。
カルボニル化工程に使用する一酸化炭素は、窒素やメタン等の不活性ガスが含まれていてもよい。カルボニル化工程は、一酸化炭素分圧として、好ましくは0.5~5MPa、より好ましくは1~4MPa、さらに好ましくは1.5~3MPaの範囲で実施する。該一酸化炭素分圧が0.5MPaより高ければ、カルボニル化反応が十分に進行し、不均化や重合等の副反応が併発せず、高収率に目的物である脂環式ジカルボン酸フロライドを得ることができる。また該一酸化炭素分圧が5MPa以下であることは設備負荷の観点から好ましい。
カルボニル化工程に使用するHFは、反応の溶媒であり、触媒であり、かつ副原料となるため、実質的に無水のHFを用いることが好ましい。本実施形態において、実質的に無水のHFとは、水分濃度が200ppm以下であるHFのことを意味する。カルボニル化工程において、HFの使用量は、原料の4-イソプロペニル-1-メチル-1-シクロヘキセンに対して、好ましくは4~30モル倍、より好ましくは7~20モル倍、さらに好ましくは10~15モル倍である。該HFの使用量が4モル倍以上あれば、カルボニル化反応は効率良く進行し、不均化や重合等の副反応を抑制でき、高収率で目的物である脂環式ジカルボン酸フロライドを得ることができる。また、該HFの使用量は、原料コスト及び生産性の観点から、30モル倍であることが好ましく、15モル倍以下あることがより好ましい。
工程(a)におけるカルボニル化反応の形式は特に限定されず、回分式、半連続式、連続式等の何れの形式でもよい。
エステル化工程は、前記カルボニル化工程で生成した脂環式ジカルボン酸フロライドを、炭素数1~4のアルコールと反応させて脂環式ジカルボン酸エステル化合物とする工程である。なお、エステル化工程において、前記カルボニル化工程で生成した反応液をそのまま用いてもよい。反応装置の腐食性の観点から、エステル化工程において、前記カルボニル化工程で生成した反応液に所定量のアルコールを添加していく方法が好ましい。また、前記カルボニル化工程で生成した反応液から過剰のHFを留去した後、該反応液にアルコールを添加してエステル化を行なうこともできる。
エステル化工程の反応温度は、上記式(2)で表される脂環式ジカルボン酸エステル化合物の分解抑制の観点から、好ましくは-40℃以上20℃以下、より好ましくは-30℃~10℃、さらに好ましくは-30℃~0℃である。該反応温度を-40℃以上にすることで、エステル化速度を高め収率を向上させることができる。また、該反応温度を20℃以下にすることで、エステルの分解を抑制するとともに、アルコールの脱水反応による水の副生を抑制することができる。
(c)工程において、前記エステル化工程で得られた式(2)で表される脂環式ジカルボン酸エステル化合物(以下「脂環式ジカルボン酸エステル化合物」とも記す。)の還元方法は、通常、カルボニル化合物をアルコールに還元する際に用いられる方法であればいずれも使用でき、特に限定されない。当該還元方法としては、例えば第5版 実験化学講座14巻(丸善株式会社)11~27頁記載のヒドリド還元、金属及び金属塩による還元方法、接触水素化による還元方法などをいずれも用いることができるが、経済性の観点から接触水素化による還元方法が好ましい。
脂環式ジカルボン酸エステル化合物の接触水素化に用いられる触媒(以下「接触水素化触媒」とも記す。)は、カルボニル化合物の水素化に用いられる通常の触媒であれば特に限定されないが、周期表第8~11属金属から選ばれる少なくとも1種を含有する触媒が好ましい。
還元工程は無溶媒で行うことができるが、溶媒を使用してもよい。
還元工程における水素の圧力は、反応平衡をアルコール側に移動させるという観点からは高圧ほど好ましいが、設備コストを考慮して、1~30MPaが好ましく、5~25MPaがより好ましく、10~20MPaがさらに好ましい。
<その他の工程>
本実施形態の製造方法は、上述した工程(a)及び(b)以外にその他の工程を含んでいてもよい。その他の工程としては、特に限定されないが、例えば、液々抽出工程、触媒回収工程、中和水洗工程、助剤回収工程、精製工程が挙げられる。
[ガスクロマトグラフィー分析条件]
ガスクロマトグラフィーにおいて、測定装置として島津製作所製GC-17Aを用い、キャピラリーカラムとしてULBON製 HR-1(0.32mmφ×25m×0.50μm)を用いた。また、昇温条件は、100℃から300℃まで5℃/分で昇温する条件とした。
ガスクロマトグラフィー分析により、生成物である数種類の異性体ジカルボン酸エステル化合物の面積割合(GC%)を求め、内部標準法によりジカルボン酸エステル化合物の収率及び異性体比を下記式により算出した。
ガスクロマトグラフィー分析により、生成物である数種類の異性体ジオール化合物の面積割合(GC%)を求め、内部標準法により2-(4-(ヒドロキシメチル)-4-メチルシクロヘキシル)-2-メチルプロパン-1-オールの収率を算出した。
GC-MS測定装置として、Thermo ELECTRON社製GC-MSスペクトル装置のPOLARIS Qを用いた。
下記条件によりNMRを測定した。
モード:Proton、Carbon、DEPT45°、90°、135°、Carbon i.g.、INADEQUATE
溶媒 :CDCl3(重クロロホルム)
内部標準物質:テトラメチルシラン
メチル-4-(1-メトキシ-2-メチル-1-オキソプロパン-2-イル)-1-メチルシクロヘキサンカルボキシレートの製造((a)カルボニル化工程、及び(b)エステル化工程)。
ナックドライブ式撹拌機、上部に3個の入口ノズル及び底部に1個の抜き出しノズルを備え、ジャケットにより内部温度を制御できる内容積500mlのステンレス製オートクレーブを用いてカルボニル化工程を以下のとおり行った。
引き続いて、オートクレーブ内において、反応温度を-27℃に保持しながら、メタノールをオートクレーブ上部より49.1g(1.53モル)供給して、反応液を撹拌しながら1時間、脂環式ジカルボン酸フロライドのエステル化を行った。
上記エステル化工程で得られた液をエバポレーターで減圧蒸留することにより、該液から低沸物を除去した。その後、低沸物を除去した液を、理論段数20段の精留塔を用いて精留した(留出温度177℃、真空度20torr)。該精留により、主留部分としてガスクロマトグラフィー分析で異性体比が92.0%の生成物が、42.0g(蒸留収率93.2モル%、1-メトキシ-2-メチル-1-オキソプロパン-2-イル)-1-メチルシクロヘキサンカルボキシレート基準)で得られた。
2-(4-(ヒドロキシメチル)-4-メチルシクロヘキシル)-2-メチルプロパン-1-オールの製造。
前記還元工程で得られた生成物をメタノールに溶解させた。その後、得られた溶液に、n-ヘキサン40gをゆっくりと注加して、析出した結晶をろ過分別した。得られた生成物は純度100%の白色固体であった(12.6g、晶析収率65.7モル%:2-(4-(ヒドロキシメチル)-4-メチルシクロヘキシル)-2-メチルプロパン-1-オール基準)。
実施例1の上記再結晶精製で得られた生成物についてGC-MS分析を行った結果、分子量は200であった。
1H-NMR(600MHz、CDCl3、TMS、ppm)δ:0.700~0.955(m,9H)、1.113~1.231(m,6H)、1.473~1.560(m,2H)、1.638~1.726(m,2H)、3.281~3.457(m,4H)、4.907(m,1H)
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WO2019159906A1 (ja) * | 2018-02-16 | 2019-08-22 | 三菱瓦斯化学株式会社 | トリシクロ[5.2.1.02,6]デカン-2-カルボン酸エステルの製造方法 |
KR20220110945A (ko) * | 2021-02-01 | 2022-08-09 | 한화솔루션 주식회사 | 이종금속 수소화 촉매의 제조 방법 |
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