WO2014061571A1 - 新規脂環式ジカルボン酸エステル化合物、及びその製造方法 - Google Patents
新規脂環式ジカルボン酸エステル化合物、及びその製造方法 Download PDFInfo
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- WO2014061571A1 WO2014061571A1 PCT/JP2013/077712 JP2013077712W WO2014061571A1 WO 2014061571 A1 WO2014061571 A1 WO 2014061571A1 JP 2013077712 W JP2013077712 W JP 2013077712W WO 2014061571 A1 WO2014061571 A1 WO 2014061571A1
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- dicarboxylic acid
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- IQRXFHMNBWHLIA-UHFFFAOYSA-N CC(C)(C(CC1)CCC1(C)C(OC)=O)C(OC)=O Chemical compound CC(C)(C(CC1)CCC1(C)C(OC)=O)C(OC)=O IQRXFHMNBWHLIA-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/58—Preparation of carboxylic acid halides
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C61/00—Compounds having carboxyl groups bound to carbon atoms of rings other than six-membered aromatic rings
- C07C61/08—Saturated compounds having a carboxyl group bound to a six-membered ring
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/14—Preparation of carboxylic acid esters from carboxylic acid halides
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/74—Esters of carboxylic acids having an esterified carboxyl group bound to a carbon atom of a ring other than a six-membered aromatic ring
- C07C69/75—Esters of carboxylic acids having an esterified carboxyl group bound to a carbon atom of a ring other than a six-membered aromatic ring of acids with a six-membered ring
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- 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
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/36—Preparation of carboxylic acid esters by reaction with carbon monoxide or formates
- C07C67/38—Preparation of carboxylic acid esters by reaction with carbon monoxide or formates by addition to an unsaturated carbon-to-carbon bond
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/74—Esters of carboxylic acids having an esterified carboxyl group bound to a carbon atom of a ring other than a six-membered aromatic ring
- C07C69/757—Esters of carboxylic acids having an esterified carboxyl group bound to a carbon atom of a ring other than a six-membered aromatic ring having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
Definitions
- the present invention relates to a novel alicyclic dicarboxylic acid ester 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 dicarboxylic acid ester compound having a cyclohexane ring and a method for producing the same.
- the present inventor relates to a method for producing a novel alicyclic dicarboxylic acid ester compound represented by the following formula (1) from 4-isopropenyl-1-methyl-1-cyclohexene represented by the following formula (3):
- a novel alicyclic dicarboxylic acid ester compound represented by the following formula (1) can be produced. I found it.
- each R is independently an alkyl group having 1 to 4 carbon atoms.
- each R is independently an alkyl group having 1 to 4 carbon atoms.
- the novel alicyclic dicarboxylic acid ester 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 (3) 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 55 ppm portion in FIG.
- the result of the HSQC-NMR measurement of the product obtained in Example 1 is shown.
- FIG. 8 is an enlarged view of a measurement result of a 3.50 to 3.70 ppm portion in FIG.
- FIG. 10 is an enlarged view of a measurement result of a 3.50 to 3.70 ppm portion in FIG.
- the result of 1H-NMR measurement of the product obtained in Example 1 is shown. It is the enlarged view which displayed the horizontal axis of the peak 6 in FIG. 1 in Hz.
- the result of the COZY-NMR measurement of the product obtained in Example 1 is shown.
- the NOEZY-NMR measurement result of the product obtained in Example 1 is shown.
- novel alicyclic dicarboxylic acid ester compound of the present embodiment is represented by the following formula (1).
- each R is independently an alkyl group having 1 to 4 carbon atoms.
- the alkyl group having 1 to 4 carbon atoms represented by R is not particularly limited, and examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, i- Examples thereof include a butyl group and a t-butyl group. Of these, a methyl group, an ethyl group, and an n-propyl group are preferable, a methyl group and an ethyl group are more preferable, and a methyl group is more preferable.
- Such an alicyclic dicarboxylic acid ester compound represented by the formula (1) can be used, for example, as a raw material for a polyester resin, and optical properties can be obtained by using the alicyclic dicarboxylic acid ester compound.
- a material excellent in heat resistance can be manufactured.
- optical material uses, such as a lens are mentioned.
- the compound of the present embodiment has a cyclohexane ring, it can take a plurality of three-dimensional structures.
- the three-dimensional structure of the compound of the present embodiment differs depending on, for example, whether the functional group or hydrogen atom bonded to the carbon in the cyclohexane ring is in an axial position or an equatorial position, and is bonded to the carbon in the cyclohexane ring.
- a trans form or a cis form is obtained.
- a functional group having a large steric hindrance in the cyclohexane ring for example, a functional group such as 1-methoxy-2-methyl-1-oxopropan-2-yl group is in the equatorial position, and the steric hindrance is When a three-dimensional structure in which a small hydrogen atom or the like is in an axial position, it tends to be stable. Moreover, when the compound of this embodiment is a trans body, there exists a tendency for the reactivity of reactive substituents, such as a carboxylate group, to become high.
- the alicyclic dicarboxylic acid ester compound having such characteristics is useful as a raw material for a polyester resin excellent in optical anisotropy.
- the compound of the present embodiment is preferably an alicyclic dicarboxylic acid ester compound whose steric structure is represented by the following (1-1).
- each R is independently an alkyl group having 1 to 4 carbon atoms.
- the manufacturing method of the novel alicyclic dicarboxylic acid ester compound of this embodiment includes the following process (a) and (b).
- (A) 4-isopropenyl-1-methyl-1-cyclohexene represented by the following formula (3) is reacted with carbon monoxide in the presence of hydrogen fluoride (hereinafter also referred to as “HF”),
- a step of obtaining an alicyclic dicarboxylic acid fluoride represented by the formula (2) hereinafter sometimes abbreviated as “carbonylation step”).
- 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 (3) 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 (2) (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 used is preferably 4 to 30 mol times, more preferably 7 to 20 mol times, still more preferably 10 times the amount of 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 may be any form such as a batch system, a semi-continuous system, and a continuous system.
- 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.
- 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 ⁇ 35 to 10 ° C., from the viewpoint of inhibiting the decomposition of the alicyclic dicarboxylic acid ester compound represented by the above formula (1). More preferably, it is ⁇ 30 to 0 ° C.
- the reaction temperature is preferably from ⁇ 40 ° C. or higher, 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 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.
- Apparatus Bruker Avance 600II (600 MHz-NMR) Mode: Proton, Carbon, DEPT 45 °, 90 °, 135 °, Carbon i. g. , INADEQUATE, HSQC, H2BC, HMBC Solvent: CDCl3 (deuterated chloroform) Internal standard: Tetramethylsilane
- 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).
- FIG. 1 shows the results of DEPT 45 ° -NMR measurement. From FIG. 1, the peak disappearance of the quaternary carbon atoms No. 5 and No. 7 was found.
- FIG. 2 shows the results of DEPT 90 ° -NMR measurement. From FIG. 2, it was found that the peak No. 6 that is a tertiary carbon atom was detected strongly.
- FIG. 3 shows the results of DEPT135 ° -NMR measurement. From FIG. 3, it was found that secondary carbon atoms No. 2 and No. 4 were detected downward.
- FIG. 4 shows Carbon i. g. -NMR measurement results are shown. From FIG. 4, the carbon number was confirmed. 5 and 6 show the results of the INADEQUAT-NMR measurement (FIG.
- FIG. 6 is an enlarged view of the measurement results at 15 to 55 ppm in FIG. 5). From FIG. 5 and FIG. 6, the correlation of the direct bond between carbon and carbon was found.
- 7 and 8 show the results of HSQC-NMR measurement (FIG. 8 is an enlarged view of the measurement results in the 3.50 to 3.70 ppm portion in FIG. 7). From FIG. 7 and FIG. 8, it was possible to grasp the hydrogen atom bonded to each carbon atom.
- FIGS. 9 and 10 show the results of HMBC-NMR measurement (FIG. 10 is an enlarged view of the measurement results at 3.50 to 3.70 ppm in FIG. 9). From FIG. 9 and FIG. 10, it was possible to grasp hydrogen atoms that are two bonds away from each carbon atom.
- Example 1 the main component of the product obtained in Example 1 was methyl-4- (1-methoxy-2-methyl-1-oxopropan-2-yl) -1- Identified as methylcyclohexanecarboxylate.
- FIG. 11 shows the results of 1H-NMR measurement.
- FIG. 12 is an enlarged view of the peak 6 (the peak of the hydrogen atom bonded to the carbon to which the 1-methoxy-2-methyl-1-oxopropan-2-yl group is bonded) in FIG.
- FIG. 12 shows that the peak is divided into nine and that the coupling constant of each peak is 12 Hz or 3 Hz. Accordingly, in the compound (methyl-4- (1-methoxy-2-methyl-1-oxopropan-2-yl) -1-methylcyclohexanecarboxylate) shown in FIG. It was shown that the atom (hydrogen atom bonded to the carbon to which the 1-methoxy-2-methyl-1-oxopropan-2-yl group is bonded) is in the axial position of the cyclohexane ring.
- FIG. 13 shows the results of COZY-NMR measurement.
- FIG. 14 shows the NOEZY-NMR measurement results. Comparing the measurement results of FIG. 13 and FIG. 14, the compound (methyl-4- (1-methoxy-2-methyl-1-oxopropan-2-yl) -1-methyl shown in FIGS. In cyclohexanecarboxylate), it was shown that NOEZY-NMR measurement-specific correlations were obtained between the hydrogen atoms at positions 2 and 9 and between the hydrogen atoms at positions 6 and 8. That is, it was shown that the hydrogen atoms at positions 2 and 9 are spatially close, and the hydrogen atoms at positions 6 and 8 are spatially close. Thus, in the compound shown in FIGS.
- Example 2 The carbonylation step, the esterification step and the product were isolated and purified in the same manner as in Example 1 except that the reaction temperature in the carbonylation step was -15 ° C. After isolation and purification, the obtained liquid was analyzed by gas chromatography. As a result, the yield of the dicarboxylic acid ester compound was 25.6 mol% (based on 4-isopropenyl-1-methyl-1-cyclohexene).
- Example 3 The carbonylation step, esterification step, and product isolation and purification were performed in the same manner as in Example 2 except that the pressure of carbon monoxide in the autoclave was 3 MPa. After isolation and purification, the obtained liquid was analyzed by gas chromatography. As a result, the yield of the dicarboxylic acid ester compound was 27.5 mol% (based on 4-isopropenyl-1-methyl-1-cyclohexene).
- novel alicyclic dicarboxylic acid ester 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
すなわち、本発明は以下のとおりである。
[1]下記式(1)で表される脂環式ジカルボン酸エステル化合物。
[2]立体構造が下記(1-1)で表される、[1]に記載の脂環式ジカルボン酸エステル化合物。
[3]フッ化水素の存在下、下記式(3)で表される4-イソプロペニル-1-メチル-1-シクロヘキセンと一酸化炭素とを反応させ、下記式(2)で表わされる脂環式ジカルボン酸フロライドを得る工程と、
得られた下記式(2)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(1)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、
を含む、脂環式ジカルボン酸エステル化合物の製造方法。
(a)下記式(3)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(2)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(2)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(1)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)。
工程(a)において、下記式(3)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(2)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モル倍以下で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。
<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]
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。
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、HSQC、H2BC、HMBC
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
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。
実施例1の上記単離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256であった。
1H-NMR(600MHz、CDCl3、TMS、ppm)δ:0.994~1.055(m,14H)、1.380~1.401(m,2H)、1.488(m,1H)、2.147~2.168(m,2H)、3.567(s,3H)、3.596(s,3H)
実施例1で得られたメチル-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立体構造をNMR測定により以下のとおり同定した。
カルボニル化工程における反応温度を-15℃とした以外は実施例1と同様にカルボニル化工程、エステル化工程及び生成物の単離精製を行った。単離精製後、得られた液をガスクロマトグラフィーで分析した結果、ジカルボン酸エステル化合物の収率は、25.6モル%(4-イソプロペニル-1-メチル-1-シクロヘキセン基準)であり、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収率は、18.7モル%(4-イソプロペニル-1-メチル-1-シクロヘキセン基準、異性体比73.0%)であった。
オートクレーブ内における一酸化炭素の圧力を3MPaとした以外は実施例2と同様にカルボニル化工程、エステル化工程及び生成物の単離精製を行った。単離精製後、得られた液をガスクロマトグラフィーで分析した結果、ジカルボン酸エステル化合物の収率は、27.5モル%(4-イソプロペニル-1-メチル-1-シクロヘキセン基準)であり、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収率は、20.1モル%(4-イソプロペニル-1-メチル-1-シクロヘキセン基準、異性体比73.1%)であった。
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WO2019138988A1 (ja) * | 2018-01-12 | 2019-07-18 | 株式会社ダイセル | 脂環式エポキシ化合物製品 |
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