WO2004018445A1 - 2-オキサビシクロ[3.3.0]オクタン化合物、その製造方法、光学分割剤、ジアステレオマー混合物の分離方法及びアルコールの光学分割方法 - Google Patents
2-オキサビシクロ[3.3.0]オクタン化合物、その製造方法、光学分割剤、ジアステレオマー混合物の分離方法及びアルコールの光学分割方法 Download PDFInfo
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- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/93—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems condensed with a ring other than six-membered
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/93—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems condensed with a ring other than six-membered
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- C07B2200/07—Optical isomers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Definitions
- the present invention relates to a 2-oxabicyclo [3. 3. 0] octane skeleton useful as an optical resolving agent, a hydrocarbon group via an oxygen atom at the 1-position, a hydrogen atom at the 5-position, an alkoxy group, etc. (Hereinafter, referred to as “2-oxabicyclo [3.3.0] octane compound”), a method for producing the compound, an optical resolving agent, a method for separating a diastereomer mixture, And an optical resolution method for alcohol using the optical resolution agent.
- 2-oxabicyclo [3. 3. 0] octane skeleton useful as an optical resolving agent
- a hydrocarbon group via an oxygen atom at the 1-position a hydrogen atom at the 5-position
- an alkoxy group etc.
- 2-oxabicyclo [3.3.0] octane compound a method for producing the compound, an optical resolving agent, a method for separating
- Physiologically active substances such as pharmaceuticals, agricultural chemicals, flavors, and sweeteners include alcohols having an asymmetric carbon atom or compounds having a partial structure of alcohol (hereinafter simply referred to as “alcohols”).
- optical isomers may differ greatly in the intensity of the physiological activity, or may exhibit a completely different physiological activity. Therefore, development of a method for simply and reliably separating an optical isomer mixture of alcohols is desired.
- optical resolution of alcohols examples include: Syn lett t., (6), 8
- a natural optically active environment for example, the organ of a monkey containing an esterification enzyme or a hydrolase
- only one of the optical isomers is left as alcohol, and the other is converted to an ester derivative to obtain an optical derivative.
- a method of dividing is described.
- these enzymes have poor chemical stability, especially thermal stability, cannot be used at high temperatures, and are expensive and difficult to obtain in large quantities. There is a problem.
- a novel 2-oxabicyclo [3.3.0] octane compound which can be used as an optical resolving agent for a mixture of optical isomers such as alcohols, a method for producing the same, and a method for producing the 2-oxabicyclo [3.3.0] octane compound.
- An object of the present invention is to provide a single type of optical resolving agent, a method for separating a diastereomer mixture, and a method for optically resolving alcohol using the optical resolving agent.
- FIG. 1 is a conceptual diagram showing the flow of a liquid in a simulated moving bed type chromatographic separation apparatus used in the present invention. Disclosure of the invention
- R ' represents a methyl group or the like.
- the present inventors have proposed, as an analog of the compound represented by the formula (A), a 2-oxabicyclo mouth [3.3.0] having a 2-oxabicyclo mouth having various substituents bonded to the 5-position of the octane ring [3. . 3.0] Diligent studies were conducted to obtain octane compounds.
- a cyclopentanone compound having a 2-acetoxityl group at the 2-position of cyclopentanone and a substituent such as a hydrogen atom or an alkoxycarbonyl group is used, and this compound and an alcohol are acidified.
- a 2-oxabicyclo [3.3.0] octane compound in which the 5-position of the octane ring is a hydrogen atom, an alkoxycarbonyl group, etc. was found to be able to be obtained efficiently, and it could be used as an optical resolution agent for a mixture of optical isomers such as alcohol.
- the present inventors have proposed a monoalkoxy wherein an optionally substituted chiral hydrocarbon group is bonded to the 1-position of the 2-oxabicyclo [3.3.0] octane ring via an oxygen atom.
- 2-oxabisik mouth [3.3.0]
- a diastereomer mixture of octane compounds can be efficiently separated into each diastereomer by simulated moving bed chromatography or distillation method, and the separated diastereomer is used.
- an alcohol having an asymmetric carbon atom in the molecule can be optically resolved, and have completed the present invention.
- equation (1) (1)
- R 1 ⁇ 1 ° each independently represent a hydrogen atom or an alkyl group substituted carbon atoms which may based on have 1 to 20, R 1 1 is used, the number of hydrogen atom, a substituent An alkyl group which may be substituted, an alkynyl group which may have a substituent, a cycloalkyl group which may have a substituent, a cycloalkenyl group which may have a substituent, An aryl group, a honoleminole group, an optionally substituted acyl group, an optionally substituted alkoxycarbonyl group, an optionally substituted alkenyloxycarbo group
- R 12 represents an optionally substituted aryloxycarbonyl group or an optionally substituted alkenyl group
- R 12 represents an optionally substituted hydrocarbon Group (however, R 11 may have a substituent In the case of an alkenyl group, R 12 is chiral. And a 2-oxabicyclo [3.3.0]
- R 1 2 is, it is preferable to have a substituent is also optionally chiral secondary hydrocarbon group having a crosslinked structure More preferably, it is a chiral secondary hydrocarbon group or a chiral secondary alkyl group substituted with an alkoxycarbonyl group.
- R 1 ⁇ 1 ° each independently represent a hydrogen atom or an alkyl group substituted carbon atoms which may based on have 1 to 20, R 1 1 is used, the number of hydrogen atom, a substituent Alkyl group which may be substituted, alkynyl group which may have a substituent, cycloalkyl group which may have a substituent, cycloalkyl group which may have a substituent
- An aryl group which may have a substituent, a honoleminole group, an acyl group which may have a substituent, an alkoxycarbonyl group which may have a substituent, and a group which has a substituent R represents a good alkoxycarbonyl group, an optionally substituted aryloxycarbonyl group, or an optionally substituted alkenyl group;
- the optical resolution agent which consists of at least 1 sort (s) of 2-oxabicyclo [3.3.0] octane compound represented by these is provided.
- a diastereomer mixture of a 2-oxabicyclo [3.3.0] octane compound represented by the formula (1) of the present invention is separated into each diastereomer by simulated moving bed type chromatography.
- a method for separating a diastereomeric mixture of 2-oxabicyclo [3.3.0] octane compounds represented by the above formula (1) is provided.
- the diastereomer mixture of the 2-oxabicyclo [3.3.0] octane compound represented by the formula (1) of the present invention can be separated into respective diastereomers by distillation.
- a method for separating a diastereomer mixture of a 2-oxabicycline [3.3.0] otatan compound represented by the above formula (1), which is characterized by the following, is provided.
- the compound represented by the formula (3) and the formula R 14 OH CR 14 represent a hydrocarbon group having an asymmetric carbon atom (which may have a substituent). Is reacted with an optical isomer mixture of an alcohol represented by the formula (4)
- the compound represented by the formula (4) is performed by separating the diastereomer mixture into each diastereomer by simulated moving bed chromatography, or by distilling the diastereomer mixture into each diastereomer. It is preferable to separate things.
- the method for optical resolution of alcohol of the present invention is represented by the following diastereomer of the compound represented by the formula (4) and a formula: R 13 OH (R 13 has the same meaning as described above).
- an alcohol by reacting in the presence of an acid catalyst, wherein: is represented by R 1 4 OH (R 1 4 have the same meanings as described above.) optically active alcohol and the formula represented by (3) It is preferable that the compound represented by the formula (3) is isolated and reused as an optical resolution agent for alcohol.
- a first aspect of the present invention is a 2-oxabicyclo [3.3.0] octane compound represented by the above formula (1).
- R 1 to 1 ° each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms which may have a substituent.
- alkyl group having 1 to 20 carbon atoms examples include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, an isobutyl group, an n-pentynole group, and an n- Xinole group, n-octinole group, n-noninole group, n-decinole group and the like.
- substituents examples include a hydroxyl group; an alkoxy group such as a methoxy group and an ethoxy group; an alkylthio group such as a methylthio group and an ethylthio group; a halogen atom such as fluorine and chlorine; a phenyl group and a 2-chlorophenyl group.
- R 1 to R 1 Q are each independently laid preferable that a hydrogen atom or a methyl group, all of R 1 to R 1 Q is hydrogen Particularly preferred is an atom.
- R 11 represents a hydrogen atom, an alkyl group which may have a substituent, an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, or a substituent
- the total carbon number of R 11 is preferably 1 to 20.
- Examples of the alkyl group for R 11 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, a tert-butyl group, an n-methyl group, and an n-hexyl group. And the like.
- alkynyl group examples include an ethur group, a propargyl group, and a 1-butul group.
- cycloalkyl group examples include a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, and a cyclooctyl group.
- Examples of the cycloalkenyl group include a cyclopentenyl group, a cyclohexenyl group, and a cyclooctenyl group.
- aryl group examples include a phenyl group, a 11-naphthyl group and a 2-naphthyl group.
- the substituent of the alkyl group, alkynyl group, cycloalkyl group, cycloalkenyl group and aryl group is not particularly limited as long as it is stable to an acid. Examples include an alkoxy group, an alkoxycarbonyl group, a hydroxyl group, an acyl group, a nitro group, a cyano group, a halogen atom, a phenyl group, a heterocyclic group, and the like.
- the substitution positions of these substituents are not particularly limited, and the same or different It may be bonded to a hydride group.
- Examples of the optionally substituted acryl group include an acetyl group, a propioyl group, a butyryl group, a benzoyl group, a 4-methylbenzoyl group, a 2,4,6-trimethylbenzoyl group and the like.
- Alkoxycarbonyl groups include methoxycarbonyl, ethoxycarbonyl, n-propoxycarbinole, isopropoxycarbinole, n-butoxycarbonyl, sec-butoxycarbonyl, tert- Butoxycarbyl group, n-pentyloxycarbol group, n-hexyloxycarbonyl group and the like.
- alkenyloxycarbinole group examples include a vinylinoleoxycanolebonyl group, a 1-propininoleoxycarbonyl group, a 2-propenyloxycarbonyl group, an isopropenyloxycarbonyl group, and a 2-butenyl group. And a methoxycarbonyl group, a methallyloxycarbonyl group, a 2-pentyloxycarbonyl group, a 2-hexenyloxycarbonyl group and the like.
- examples of the aryloxycarbonyl group include a phenoxycarbonyl group, an 11-naphthyloxycarbonyl group, and a 2-naphthyloxycarbonyl group.
- Examples of the substituent of the alkoxycarbonyl group, alkenyloxycarbonyl group and aryloxycarbonyl group include a halogen atom, an alkoxy group, an alkylthio group, an alkylsulfonyl group, a cyano group, a nitro group, and a substituent. And a heterocyclic group which may have a substituent.
- the substitution positions of these substituents are not particularly limited, and a plurality of same or different may be bonded.
- alkenyl group examples include a butyl group, a 1-propenyl group, a 2-propenyl group, an isopropenyl group, a 1-butyl group, a 2-butenyl group, a 3-butenyl group, a methallyl group, and a 1-pentenyl group.
- the substituent of the alkenyl group is not particularly limited as long as it is stable to an acid catalyst.
- Examples include a good fuel group and a heterocyclic group which may have a substituent.
- the substitution positions of these substituents are not particularly limited, and a plurality of same or different substituents may be bonded.
- Alkenyl groups such as, 3-butenyl group, methallyl group, 1-pentenyl group, 2-pentenyl group, 2-ethyl-2-ptenyl group; cinnamyl group, 4-cyclomethyl cinnamyl group, 2-methylcinnamyl group And the like.
- R 11 is a hydrogen atom, an alkyl group which may have a substituent, or an alkoxy group which may have a substituent, for reasons such as easy availability and production.
- a carbonyl group, an alkenyloxycarbonyl group which may have a substituent, an aryloxycarbol group which may have a substituent, or a carbon number 2 to 2 which may have a substituent 6 is preferably an alkenyl group, more preferably a hydrogen atom, an alkyl group which may have a substituent, an alkoxycarbonyl group which may have a substituent, or an alkenyl group having 2 to 6 carbon atoms.
- An atom, an optionally substituted alkoxycarbonyl group and a 2-propenyl group are particularly preferred.
- R 12 represents a hydrocarbon group which may have a substituent, preferably a hydrocarbon group having 1 to 20 carbon atoms which may have a substituent.
- the hydrocarbon group may be a primary, secondary or tertiary hydrocarbon group.
- Examples of the hydrocarbon group represented by R 12 include an alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, a cycloalkenyl group, and a bridged structure (two or more non-adjacent cyclic structures are represented by one or more atoms. And a hydrocarbon group having a (bridged structure).
- Examples of the alkyl group represented by R 12 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a t-butyl group, and a n-butyl group.
- alkenyl group examples include 1-propenyl group, 2-propenyl group, 1-butenyl group, 2-butenyl group, 3-butenyl group, 1-pentynole group, 2-pentenyl group, 3 —Pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexyl, 5-hexenyl, 1-heptenyl, 2 —Heptenyl group, 5-heptyl group, 6-hepturyl group, 1-octyl group, 2-octenyl group, 4-octyl group, 7-octyl group and the like.
- Examples of the alkiel group include 1-propyl group, 2-propynyl group, 1-butyl group, 2-butynyl group, 3_butynyl group, 1-pentynyl group, 2_pentyl group, 41-pentynyl group, and 1-hexyl group.
- cycloalkyl group examples include cycloalkyl groups such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptinole group, and a cyclooctyl group.
- Examples of the cycloalkenyl group include cycloalkenyl groups such as 2-cyclopentyl group, 3-cyclopentenyl group, 2-cyclohexenyl group, 3-cyclohexenyl group, 2-cycloheptenyl group, and 3-cyclooctenyl group. And the like.
- Examples of the hydrocarbon group having a bridged structure include a bicyclo [2.1.0] pentyl group, a bicyclo [4.1.0] heptane-3-yl group, and a bicyclo [2.2.1] ] Heptane-2-yl group, bicyclo [3.2.1] octane-6-yl group and the like.
- R 1 2 hydrocarbon group for example, a haloalkyl group, an alkoxy group, an alkoxycarbonyl group, an alkylthio group, an alkylsulfonyl group, Ashiru group, Ashiruamino group, a nitro group, Shiano group, a halogen atom, a silyl group, A phenyl group which may have a substituent, a heterocyclic group which may have a substituent, and the like. It is.
- substituent of the phenyl group and the heterocyclic group examples include a halogen atom such as fluorine and chlorine; an alkyl group such as a methyl group and an ethyl group; an alkoxy group such as a methoxy group and an ethoxy group; a cyano group; And the like.
- the substitution positions of these substituents are not particularly limited, and a plurality of the same or different substituents may be bonded to the hydrocarbon group.
- R 12 may be a group having an asymmetric carbon atom or may be a group having no asymmetric carbon atom, but when R 11 is an alkenyl group which may have a substituent, R 12 is a chiral group having at least one asymmetric carbon atom.
- R 12 is a group having an asymmetric carbon atom, the number of asymmetric carbon atoms may be one or more, and the position of the asymmetric carbon atom is not particularly limited.
- R 12 is a primary hydrocarbon group
- secondary hydrocarbon group may be any of a tertiary hydrocarbon group, is secondary hydrocarbon group And more preferably a secondary hydrocarbon group having 1 to 15 carbon atoms.
- R 12 R 1 2 is a secondary hydrocarbon group which may chiral have a substituent, a chiral secondary hydrocarbon group having a bridged structure, or Arukoshikaru Boniru substituted More preferably a chiral secondary alkyl group, chiral 2-isopropyl-15-methyl-cyclohexyl group (menthyl group), chiral 1,7,7-trimethylbicyclo [2.2.1] heptane More preferably, a 2-yl group (borninole group) or a chiral 11-ethoxycarbonylethyl group, and a chiral 1,7,7-trimethylbicyclo [2.2.1] heptane-12-yl group (Bornyl group) or a chiral 1-ethoxycarbonylethyl group is particularly preferred.
- 2-oxabicyclo [3.3.0] octane compound represented by the formula (1) include 1-methoxy-2-oxabicyclo [3.3.0] octane and 1-ethoxy-12-oxabicyclo. [3.3.0] octane, 1—sec—butoxy-1 2 _oxabicyclo mouth [3.3.0] octane, 1— (1-methyloctyloxy) 1—2-oxabicyclo [3.3.0] octane, 1- (1-trifluoromethylpropoxy) _ 2-oxabicyclo [3.3.0] octane, 1_ (d) -bornyloxy 2-oxabicyclo [3.3.0] octane, 1- (1) 1-Polynoxy 2-oxabicyclo [3.3.0] octane, 1- (1— (S) 1-ethoxycarponyl) Ethoxy 1-2-oxabicyclo [3.3.0] otatan
- R 1 1 is an optionally substituted alkyl group such as octane Is the two-way mouth [3. 3. 0] Compound;
- octane 1 - (d) - Menchinoreokishi _ 5-cyclopentyl-one 2- Okisabishikuro [3. 3.0]
- R 1 1 of octane have a substituent 2-oxaxabicyclo [3.3.0] is a cycloalkyl group which may be Tan compounds;
- octane 1 one (d) Menchiruokishi one 5 one propargyl _ 2- Okisabishikuro [3. 3.0]
- R 1 1 octane has a substituent 2-oxaxabic [3.3.0] octane compound which is an optionally substituted alkynyl group;
- octane 1-(1)-mentholoxy —5—Methoxycarbonyl _ 2—oxabicyclo [3.3.0] octane, 1- (d) 1-menthinoleoxy 1—5-Methoxycarponinole 2-oxoxabicyclo [3.3.0] octane, 1— (d ) —Bornyloxy-5-methoxycarbonyl-2—oxabicyclo [3.3.0] octane, 1- (1) boleroxy-15-methoxycarbone-2-oxoxabicyclo [3.3.0] R such as octane 11 is 2-alkoxabicyclo [3.3.0] octane compound, wherein 1 is an optionally substituted alkoxycarbonyl group;
- a second aspect of the present invention is a 2-oxobicyclo [3.3.0] octane compound represented by the above formula (1) (hereinafter, abbreviated as a 2-oxobicyclo [3.3.0] octane compound (1)). ).
- the 2-oxabicyclo [3.3.0] octane compound (1) can be produced by any of the following production methods 1 or 2.
- the 2-oxabicyclo [3.3.0] octane compound (1) is composed of a cyclic pentanone compound represented by the formula (2) (hereinafter referred to as a cyclic pentanone compound (2) J) and a formula: R
- cyclopentanone can be produced by reacting an alcohol represented by 12 OH (hereinafter, abbreviated as “alcohol (5) J”) in the presence of an acid catalyst.
- the target compound can be obtained at once from compound (2).
- R 1 to 12 represent the same meaning as described above, and A represents a hydroxyl-protecting group.
- A includes a formyl group, an acetyl group, a propionyl group, a benzoyl group, a 4-chlorobenzoyl group, a tert-butoxycarbonyl group, a 2-tetrahydrofuranyl group, a 2-tetrahydroviranyl group, a 1-ethoxyhexyl group, Examples include a 1-ethoxyxoxy group and a tert-butyl group.
- an acetyl group or a benzoyl group is preferable, and an acetyl group is particularly preferable, because of easy availability and a high yield of the target product.
- the alcohol (5) is usually an alcohol having 1 to 20 carbon atoms, and may be any of primary, secondary and tertiary alcohols, and may have an asymmetric carbon atom in the molecule.
- Alcohol (5) is an optically active alcohol having an asymmetric carbon atom in the molecule when R 11 is an alkenyl group which may have a substituent, although not required.
- optically active alcohol When an optically active alcohol is used as the alcohol (5), a secondary alcohol is preferred because it is easily available and the desired product can be obtained in good yield. Secondary alcohols are more preferred. Specific examples of optically active secondary alcohols having 3 to 20 carbon atoms include menthols such as optically active 2-isopropyl-15-methyl-cyclohexanol; lactic acid esters such as optically active methyl lactate and optically active ethyl lactate. And borneols such as optically active one-end-one borneol; synthetic perfumes such as hexanol and hexanol.
- menthols such as optically active 2-isopropyl-15-methyl-cyclohexanol
- lactic acid esters such as optically active methyl lactate and optically active ethyl lactate.
- borneols such as optically active one-end-one borneol
- synthetic perfumes such as hexanol and hexano
- the amount of the alcohol (5) to be used is not particularly limited, but is usually 1 to 100 mol, preferably 1 to 5 mol, per 1 mol of the cyclopentanone compound (2).
- the reaction can be carried out by stirring the cyclopentanone compound (2) and the alcohol (5) without a solvent or in a suitable solvent in the presence of an acid catalyst.
- the acid catalyst used is not particularly limited, and either a liquid acid catalyst or a solid acid catalyst can be used.
- a liquid acid catalyst or a solid acid catalyst can be used.
- pyridinum paratoluenesulfonate (PPTS), paratoluenesulfonic acid (p-Ts ⁇ H), montmorillonite, acidic ion exchange resin, synthetic zeolite (for example, molecular sieve) and the like can be mentioned.
- the amount of the acid catalyst to be used is generally 0.0001 to 2 parts by weight, preferably 0.001 to 1 part by weight, per 1 part by weight of the cyclopentanone compound (2).
- This reaction can be carried out without a solvent or in an inert solvent.
- the solvent used is not particularly limited as long as it is an aprotic solvent.
- aromatic hydrocarbons such as benzene, toluene, xylene, and benzene; n-pentane, n-hexane, n-heptane, n-butane, cyclohexane, methinoleshexane
- Aliphatic hydrocarbons such as petroleum ether, petroleum ether; esters such as ethyl acetate, propyl acetate and butyl acetate; halogenated hydrocarbons such as dichloromethane, chloroform, carbon tetrachloride, 1,2-dichloroethane, etc .; , Dibutyl ether, tetrahydrofuran, 1,4-dioxane-1,2, -dimethoxyethane And ethers such as pentyl methyl ether and anisol; and amides such as N, N-dimethylform
- solvents can be used alone or in combination of two or more.
- an organic solvent having a relatively low boiling point such as aromatic hydrocarbons, aliphatic hydrocarbons, and halogenated hydrocarbons. It proceeds smoothly in the range, preferably from 1 10 ° C to 10150 ° C. The reaction is usually completed within minutes to tens of hours. After completion of the reaction, usual post-treatment operations are performed to obtain the desired 2-oxabicyclo [3.3.0] octane compound (1) by a known separation means such as column chromatography or distillation. it can.
- the starting material cyclopentanone compound (2) can be produced, for example, by a method similar to that described in TetrahedronLett., 3_5_, 7785 (1994). The general manufacturing route is shown below.
- R 1 to 11 and A represent the same meaning as described above, and X represents a halogen atom such as chlorine, bromine, and iodine.
- a cyclopentanone compound (2) can be obtained by reacting a cyclopentanone compound represented by the formula (6) with an alkyl halide represented by the formula (7) in the presence of a base.
- R 11 may have a substituent Arche It can also be produced by hydrogenating the carbon-carbon double bond of the alkenyl group of the compound which is a phenyl group.
- a method of hydrogenation a method of catalytic hydrogen reduction with hydrogen in the presence of a hydrogenation catalyst can be used.
- the hydrogenation catalyst used is not particularly limited. Examples thereof include palladium-based catalysts such as palladium-carbon, Lindlar's catalyst and palladium-alumina; platinum-based catalysts such as platinum oxide; ruthenium-based catalysts such as ruthenium-carbon.
- the reaction conditions for hydrogenation are not particularly limited, and ordinary conditions for catalytic hydrogen reduction can be employed.
- the 2-oxabicyclo [3.3.0] octane compound (1) can also be produced by reacting the compound represented by the formula (3) with an alcohol (5) in the presence of an acid catalyst. .
- R 13 represents a hydrocarbon group which may have a substituent.
- examples of the hydrocarbon group represented by R 13 include alkyl groups such as methyl group, ethyl group / ethyl group, n-propyl group, isopropyl group, n-butyl group; vinyl group, 1-propyl group, and 2-propyl group.
- Alkenyl groups such as phenyl, 1-butyl and 2-butenyl; alkynyl groups such as ethenyl, 1-propenyl, 2-propynyl, 1-butynyl and 2-butulyl; cyclopropyl and cyclopentyl Cycloalkyl groups such as cyclohexyl group and cyclooctyl group; cycloalkenyl groups such as cypropentenyl group, cyclohexenyl group and cyclooctenyl group; aryl groups such as phenyl group, 1-naphthyl group and 2-naphthyl group. And the like.
- substituent of the hydrocarbon group of R 13 those which are stable to an acid catalyst Is not particularly limited, for example, an alkoxy group, an alkoxycarbonyl group, an alkylthio group, an alkylsulfonyl group, an acyl group, an acylamino group, a nitro group, a cyano group, a halogen atom, and a phenyl group which may have a substituent And a heterocyclic group which may have a substituent.
- R 13 is an alkyl group having 1 to 6 carbon atoms or an alkyl group having 2 to 6 carbon atoms.
- An alkenyl group is preferred, an alkyl group having 1 to 3 carbon atoms is more preferred, and a methyl group is particularly preferred.
- the amount of the acid catalyst to be used is generally 0.0001 to 2 parts by weight, preferably 0.001 to 1 part by weight, per 1 part by weight of the compound represented by the formula (3).
- the compound represented by the formula (3) can be produced by reacting the compound represented by the formula (2) with an alcohol represented by the formula: R 13 OH in the presence of an acid catalyst. it can.
- the reaction conditions at this time, the type of the acid catalyst used, and the like are the same as in the case of the above-mentioned production method 1.
- a third aspect of the present invention is an optical resolving agent comprising at least one of 2-oxabicyclo [3.3.0] octane compound (1) which is a compound of the present invention.
- R 11 is a hydrogen atom, an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, An optionally substituted cycloalkenyl group, an optionally substituted aryl group, an optionally substituted alkoxycarbonyl group, an optionally substituted alkenyloxy carboxy group 2-oxabicyclo [3.3.0] octane compound (1), which is an aryloxycarbonyl group which may have a substituent or an optionally substituted group, is preferred. .
- the optical resolution agent of the present invention may be composed of a mixture of diastereomers, but from the viewpoint of simple and efficient optical resolution, one type of diastereomer may be used.
- the optical resolving agent of the present invention is useful as an optical resolving agent for optical isomer mixtures such as alcohols, thiols, carboxylic acids, sulfonic acids, and amines having an asymmetric carbon atom in the molecule, particularly for alcohols. It is.
- the diastereomer mixture represented by the formula (1a) and the formula (lb) is separated into respective diastereomers by separation means such as column chromatography, simulated moving bed chromatography, distillation method, crystallization method and the like. be able to.
- the fourth aspect of the present invention is a method for separating a diastereomer mixture of 2-oxabicyclo [3.3.0] octane compound (1).
- the separation method of the present invention is a method for separating a diastereomer mixture of a 2-oxabicyclo [3.3.0] octane compound (1), wherein (a) simulated moving bed chromatography or (b) It is characterized by using a distillation method.
- a simulated moving bed type Kumatomat separation apparatus In order to perform simulated moving bed chromatography, a simulated moving bed type Kumatomat separation apparatus is used.
- This separation apparatus generally has a packed bed composed of several chambers (power rams) filled with an adsorbent, and a structure in which liquid can circulate in the packed bed.
- the supply port and the discharge port are intermittently moved in the direction of the liquid flow. By doing so, the same effect as moving the adsorption layer in the direction opposite to the flow of the liquid can be obtained. That is, the same high resolution as in moving bed chromatography in which separation is performed by moving the adsorption layer can be obtained.
- the strongly adsorbed component is
- the diastereomer that is more easily adsorbed to the adsorbent, and the weakly adsorbed component is the diastereomer that is less easily adsorbed to the adsorbent.
- the adsorbent used for the simulated moving bed chromatography is not particularly limited as long as the diastereomer mixture can be separated into each diastereomer, and a known one can be used.
- Specific examples of the adsorbent include silica gel, neutral alumina, ion exchange resin, zeolite, activated carbon, and synthetic adsorbent.
- the type of the adsorbent, the average particle size, the filling amount and the like can be appropriately selected under conditions that allow the diastereomer mixture of the compound represented by the formula (1) to be most efficiently separated.
- FIG. 1 shows a conceptual diagram of the flow of the liquid in the simulated moving bed type chromatograph used in the present invention.
- 1 denotes an eluent supply port
- 2 denotes a first component liquid outlet
- 3 denotes a stock solution supply port
- 4 denotes a second component liquid outlet
- 5 denotes a circulating liquid.
- 1a to 4a indicate the positions of the supply / extraction outlets 1 to 4 at the next operation time after the operation for a certain period of time, respectively.
- the liquid is circulated from column a to column h by a circulation pump (not shown), etc., and the eluent supply port 1, the first component liquid outlet 2, the undiluted solution supply port 3, and the second component Drainage outlets 4 are located in front of columns a, c, e, and g, respectively.
- eluent supply port 1, first component liquid outlet 2, undiluted solution inlet 3, second component liquid outlet A valve (not shown) that can be opened and closed is attached to port 4, and it is possible to control which valve is opened and which valve is closed as the whole separation device. Examples of the valve include an electromagnetic valve.
- the eluent supply port 1, first component liquid outlet 2, undiluted liquid supply port 3, and second component liquid outlet 4 pass through the circulating fluid 5 along the flow direction.
- Eluent supply port 1, first component liquid outlet 2, undiluted liquid supply port 3, second component liquid outlet 4 are respectively connected to eluent supply port 1a and first component The liquid outlet 2a, the stock solution supply port 3a, and the second component liquid outlet 4a).
- operation is performed for a fixed time (operation switching time), and this operation is repeated.
- Such operating conditions can be set by appropriately selecting the flow rate of the liquid flowing through each column, the operation switching time, and the type of eluent.
- the packed bed can be apparently moved in the direction opposite to the direction of the flow of the circulating fluid 5, and the first component liquid is drained.
- the liquid containing the first component and the liquid containing the second component can be continuously discharged from the outlet 2 and the second component liquid outlet 4, respectively.
- the simulated moving bed chromatograph used in the present invention is not particularly limited.
- a simulated moving bed type chromatographic separation apparatus described in JP-A-3-168100, JP-A-3-134562 and the like can be mentioned.
- the diasteremeric mixture of 2-oxabicyclo [3.3.0] octane compound (1) can also be separated by distillation. That is, the solution containing the diastereomer mixture of the 2-oxabicyclo [3.3.0] octane compound (1) is concentrated under reduced pressure, if necessary, to remove unreacted substances and solvents, and to obtain the obtained residue. By distilling the product, only one diastereomer can be selectively extracted.
- the distillation method is not particularly limited, and for example, a normal pressure distillation method, a reduced pressure distillation method, a steam distillation method and the like can be used. Among these, the vacuum distillation method is preferred from the viewpoint of minimizing the thermal decomposition of the 2-oxabicyclo [3.3.0] octane compound (1) and increasing the separation efficiency.
- the distillation apparatus used for the distillation is not particularly limited, and for example, a known distillation apparatus such as a rectification apparatus having a rectification column filled with through-bags can be used.
- the degree of reduced pressure and distillation temperature of the reduced pressure distillation can be appropriately set depending on the kind of the 2-oxabicyclo [3.3.0] octane compound (1) to be separated and the like.
- the Ham pressure is generally 100 to 0. 0 Ol hPa, preferably 10 to 0. 0 Ol hPa, and more preferably 1 to 0.05 hPa.
- Distillation temperature is usually from 50 to 250 ° C, preferably from 70 to 200 ° C, at the oil temperature.
- the reflux ratio is usually expressed as a weight ratio of reflux amount / distillation amount, and is usually 30/1 or more, preferably 70/1 or more, more preferably 600/1 or more, and further preferably 1200/1 or more.
- the other diastereomer remains in the bottom obtained by selectively distilling only one diastereomer.
- This product can be further purified and isolated by a purification method such as distillation, column chromatography, crystallization and the like.
- a means for separating the diastereomer mixture into the respective diastereomers it is preferable to use simulated moving bed chromatography or a distillation method.
- simulated moving bed chromatography or a distillation method.
- other separation means such as silica gel column chromatography may be used. You can also.
- a fifth aspect of the present invention is a compound represented by the formula: R 14 OH
- R 14 represents a hydrocarbon group having an asymmetric carbon atom (which may have a substituent).
- the optical isomer of alcohol represented by This is an optical resolution method for a mixture.
- Optical resolution method of the present invention the step of separating 2-Okisabishikuro [3. 3.0] Okuta down compounds of the present invention (1) to each Jiasutereoma (A step), and Jiasutereoma separated, the formula: R 1 an alcohol represented by 3 ⁇ _H reacted under existence of acid catalyst, wherein the formula 2 is expressed by (3) - Okisabishikuro [3. 3.0] and to obtain octane compound (B process), A 2-oxabicyclo [3.3.0] octane compound represented by the above formula (3) is reacted with an optical isomer mixture of an alcohol represented by the formula: R 14 OH in the presence of an acid catalyst.
- step C Obtaining a diastereomer mixture of the 2-oxabicyclo [3.3.0] octane compound represented by the formula (4) (step C); and separating the diastereomer mixture into respective diastereomers (D Step), and the separated diastereomer ,
- an alcohol represented by R 1 5 OH are reacted in the presence of an acid catalyst, wherein: a step of obtaining an optically active substance of the alcohol represented by R 1 4 OH (E step).
- the diastereomer mixture of the 2-oxabisic mouth [3.3.0] octane compound (1) is separated into each diastereomer.
- the separation method include the method using simulated moving bed chromatography described above, the distillation method, the method using column chromatography, and the like, and the method using simulated moving bed chromatography or distillation is preferable. .
- Each diastereomer of the separated 2-oxabicyclo [3.3.0] octane compound (1) is a compound represented by the following formula (1-1) or (1-2).
- the substituents at the 1- and 5-positions of the 2-oxabicyclo [3.3.0] octane ring, and the R 11 and OR 12 groups are in cis configuration with respect to each other. It is an optically active substance having a configuration in which the substituents are in the ⁇ plane (or j3 plane).
- the compound represented by the formula (111) or (1-2) is reacted with an alcohol represented by the formula: R 13 OH in the presence of an acid catalyst to obtain the compound represented by the formula (3) ) Is obtained.
- the compound represented by the formula (3) is any of the compounds represented by the following (3-1) or (3-2). Since this reaction proceeds while maintaining the stereo, the compound represented by the formula (1-1) is replaced with the compound represented by the following formula (3-1) from the compound represented by the formula (1-1). Compounds represented by the following formula (3-2) are obtained from the above compounds.
- the obtained compound represented by the formula (3-1) or the compound represented by the formula (3-2) can be used as an optical resolution agent for alcohol.
- This step can be omitted, and the compound represented by the formula (1-1) or (112) can be used as it is as an optical resolving agent.
- R 14 is not particularly limited as long as it is a mixture of optical isomers of an alcohol having an asymmetric carbon atom in the molecule. Primary alcohol, secondary alcohol and tertiary alcohol Any of these may be used. Formula: Specific examples of the alcohol represented by R 1 4 ⁇ an optical isomer mixture of the same alcohol as the alcohol (5).
- the method of separation is not particularly limited, and examples thereof include ordinary column chromatography, simulated moving bed chromatography similar to the above, a distillation method, and a crystallization method. Among them, a simulated moving bed type chromatography or a distillation method is preferred.
- R 15 represents a hydrocarbon group which may have a substituent
- R14 1 an optically active alcohol represented by the formula: R14 1
- the obtained optically active alcohol can be isolated from the reaction solution by a known separation / purification means such as a distillation method and column chromatography.
- the 2- (2-acetoxitytyl) -1-2-methoxycarbonylcyclopentanone (12) was converted to a carbonated lime by a method similar to that described in the literature (Te trahedron Lett., 35, 7785 (1994)). It was prepared by reacting 2-methoxycarboxylate pentanone and 2-odoethyl acetate 1 in acetone in the presence.
- FT-IR (nujor): 3180, 2960, 2880, 1645, 1480, 1460, 1400, 1375, 1330, 1310, 1240, 1195, 1125, 1060, 1025, 960, 948, 920 cm— 1
- Example 8 1 [((IS) —endo) — (1) 1-bornyloxy] -5_ (2—probenyl) -1-2-oxabicyclo [3.3.0] octane [(18a), (18) b))
- Example 8 A simulated moving bed type chromatographic separation apparatus comprising eight semi-preparative columns, 1 cm in inner diameter and 10 cm in length, packed with silica gel 6 ON spherical neutral (manufactured by Kanto Chemical Co., Ltd.) A part of the isomer mixture obtained in the above was supplied at a concentration of 0.03 ml Z (concentration 25 V 0 1%). The operating conditions of the simulated moving bed type chromatograph are shown below.
- Comparative Example 1 Separation of a diastereomeric mixture using a high-performance liquid chromatograph Silica gel 6 ON Spherical neutral (manufactured by Kanto Kagaku Co., Ltd.) packed in a high-performance liquid chromatograph with eight semi-preparative columns of 1 cm in diameter and 10 cm in length packed in Example 8 A part of the resulting isomer mixture was supplied, and fractionated at the outlet with a fraction collector.
- the operating conditions of the high-performance liquid chromatograph are shown below.
- n-hexane / diisopropyl ether 4 da1 was used as a developing solvent, and the R f value when developed in 6′9 mm was 0.32 (isomer 11) and 0 41 (isomer 12).
- Oinolepas temperature 140 ° C
- the reflux ratio was sequentially changed to 1/1.
- the distillate was a mixture of isomer 13 and isomer 14.
- the reflux ratio expressed by the weight ratio of (distillate: reflux) is (1:30), (1:70)
- Table 2 shows the results of gas chromatographic analysis of the distillate components in the cases of (1: 600) and (1: 1200).
- optical rotation of the obtained optically active 2-octanol is shown below.
- optical rotation of the obtained optically active 2-otatanol was in good agreement with the literature value, indicating that the optical resolution of 21-otatanol could be resolved.
- a novel 1-alkoxy-12-oxabicyclo [3.3] which can optically resolve a mixture of optical isomers such as alcohols by a simple method and can be a highly versatile optical resolution agent.
- octane compounds are provided.
- an optical resolving agent (2-oxabicyclo [3.3.0] octane compound) that can easily optically resolve alcohols having an asymmetric carbon atom in the molecule. .
- the 1-alkoxy-12-oxabicyclo [3.3.0] octane compound of the present invention can be obtained in a good yield by a simple method of reacting a readily available pentanone compound with a cyclopentone and an alcohol compound. Can be manufactured.
- the compound of the present invention can be produced in good yield and in a short process.
- an optically active substance (diastereomer) having high optical purity can be efficiently and continuously obtained.
- a wide range of solvents can be used as the eluent, which is highly versatile and versatile.
- an optically active substance (diastereomer) having high optical purity can be obtained efficiently and continuously.
- a mixture of optical isomers of alcohol can be easily and reliably separated.
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/520,282 US7524978B2 (en) | 2002-08-23 | 2003-08-22 | 2-oxabicyclo[3.3.0]octane compounds, process for producing the same, optical resolver, method of separating diastereomer mixture, and method of optically resolving alcohol |
EP03792802A EP1535917A4 (en) | 2002-08-23 | 2003-08-22 | 2-OXABICYCLO 3.3.0 OCTAN COMPOUNDS, METHOD FOR THE PRODUCTION THEREOF, AGENTS FOR RAZEMATSPALTUNG, METHOD FOR SEPARATING A DIASTEREOMERIC MIXTURE, AND METHOD FOR THE RAZEMAT SPLASTING OF AN ALCOHOL |
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JP2002244371A JP2004083445A (ja) | 2002-08-23 | 2002-08-23 | 2−オキサビシクロ[3.3.0]オクタン化合物、その製造方法、ジアステレオマー混合物の分離方法及びアルコールの光学分割方法 |
JP2002-244374 | 2002-08-23 | ||
JP2002244374A JP2004083447A (ja) | 2002-08-23 | 2002-08-23 | 2−オキサビシクロ[3.3.0]オクタン化合物、その製造方法及び光学分割剤 |
JP2002-244371 | 2002-08-23 |
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WO2004018445A1 true WO2004018445A1 (ja) | 2004-03-04 |
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PCT/JP2003/010643 WO2004018445A1 (ja) | 2002-08-23 | 2003-08-22 | 2-オキサビシクロ[3.3.0]オクタン化合物、その製造方法、光学分割剤、ジアステレオマー混合物の分離方法及びアルコールの光学分割方法 |
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US (1) | US7524978B2 (ja) |
EP (1) | EP1535917A4 (ja) |
KR (1) | KR100721750B1 (ja) |
CN (1) | CN100400531C (ja) |
WO (1) | WO2004018445A1 (ja) |
Cited By (1)
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EP1719746A1 (en) * | 2004-02-19 | 2006-11-08 | Zeon Corporation | Optical resolver, process for producing optically active isomer, and 1,5-substituted bicyclo (3.3.0) -2-oxaoctane compound |
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Citations (2)
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EP0565969A1 (de) * | 1992-04-13 | 1993-10-20 | DSM Chemie Linz GmbH | Tricyclische Lactole, ihre Verwendung als Racematspaltungsmittel und Verfahren zu ihrer Herstellung |
WO2002072505A1 (fr) * | 2001-02-26 | 2002-09-19 | Zeon Corporation | Systeme de resolution optique et procede de resolution optique d'alcool utilisant celui-ci |
-
2003
- 2003-08-22 US US10/520,282 patent/US7524978B2/en not_active Expired - Fee Related
- 2003-08-22 EP EP03792802A patent/EP1535917A4/en not_active Withdrawn
- 2003-08-22 KR KR1020057003097A patent/KR100721750B1/ko not_active IP Right Cessation
- 2003-08-22 CN CNB038199920A patent/CN100400531C/zh not_active Expired - Fee Related
- 2003-08-22 WO PCT/JP2003/010643 patent/WO2004018445A1/ja active Application Filing
Patent Citations (2)
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EP0565969A1 (de) * | 1992-04-13 | 1993-10-20 | DSM Chemie Linz GmbH | Tricyclische Lactole, ihre Verwendung als Racematspaltungsmittel und Verfahren zu ihrer Herstellung |
WO2002072505A1 (fr) * | 2001-02-26 | 2002-09-19 | Zeon Corporation | Systeme de resolution optique et procede de resolution optique d'alcool utilisant celui-ci |
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DANIEWSKI ANDRZEJ ROBERT: "A new route to a chiral synthon for the total synthesis of estrone", SYNTHESIS, vol. 8, 1987, pages 705 - 708, XP002973584 * |
DANIEWSKI ANDRZEJ ROBERT: "Baeyer-Villiger oxidation of (3aS, 3aR, 7aS)-1,2,3a,4,5,6,7,7a-octahydro-7a-methyl(1H)indene-1,5-diones. Synthesis of a chiral synthon for total synthesis of 14<SYM98>-estrone", BULLETIN OF THE POLISH ACADEMY OF SCIENCES, CHEMISTRY, vol. 37, no. 7-8, 1989, pages 277 - 281, XP002973583 * |
FELDMAN KEN S.: "Intramolecular bicyclization of hydroxypentynyliodonium triflate derivatives to firnish cyclopentanne lated tetrahydrofurans: the first examples of cyclopentene formation following alkoxide addition to alkylnyliodonium salts", TETRAHEDRON LETTERS, vol. 39, no. 19, 1998, pages 2911 - 2914, XP004115744 * |
FENSTERBANK LOUIS: "Variations on radical cascades of vinyl radicals generated from (bromomethyl) dimethylsilyl propargyl ethers", TETRAHEDRON, vol. 52, no. 35, 1996, pages 11405 - 11420, XP002973582 * |
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MORTON DOUGLAS R.: "Molecular photochemistry. XXVII. Photochemical ring expansion of cyclobutanone, substituted cyclobutanones and related cyclic ketones", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 92, no. 14, 1970, pages 4349 - 4357, XP002973585 * |
NEMOTO HISAO: "A new alkenyl ether giving acetal with stereospecific manner", TETRAHEDRON LETTERS, vol. 35, no. 42, 1994, pages 7785 - 7788, XP002951549 * |
See also references of EP1535917A4 * |
SYNLETT., vol. 6, 2000, pages 862 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1719746A1 (en) * | 2004-02-19 | 2006-11-08 | Zeon Corporation | Optical resolver, process for producing optically active isomer, and 1,5-substituted bicyclo (3.3.0) -2-oxaoctane compound |
EP1719746A4 (en) * | 2004-02-19 | 2009-04-15 | Zeon Corp | RAZEMATSPALTUNG AGENT, METHOD OF MAKING OPTICALLY ACTIVE ISOMER, AND 1.5-SUBSTITUTED BICYCL (3.3.0) -2-OXAOCTAN COMPOUND |
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US20060205960A1 (en) | 2006-09-14 |
EP1535917A4 (en) | 2005-08-31 |
CN1678602A (zh) | 2005-10-05 |
US7524978B2 (en) | 2009-04-28 |
KR100721750B1 (ko) | 2007-05-25 |
EP1535917A1 (en) | 2005-06-01 |
CN100400531C (zh) | 2008-07-09 |
KR20050058487A (ko) | 2005-06-16 |
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