WO2004089928A1 - 3-シクロプロピル-3-オキソプロパナールアセタール類の製造方法 - Google Patents
3-シクロプロピル-3-オキソプロパナールアセタール類の製造方法 Download PDFInfo
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- WO2004089928A1 WO2004089928A1 PCT/JP2004/002490 JP2004002490W WO2004089928A1 WO 2004089928 A1 WO2004089928 A1 WO 2004089928A1 JP 2004002490 W JP2004002490 W JP 2004002490W WO 2004089928 A1 WO2004089928 A1 WO 2004089928A1
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- cyclopropyl
- substituent
- oxopropanal
- compound
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
- C07D317/10—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings
- C07D317/14—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D317/26—Radicals substituted by doubly bound oxygen or sulfur atoms or by two such atoms singly bound to the same carbon atom
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/64—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by introduction of functional groups containing oxygen only in singly bound form
Definitions
- the present invention relates to a method for producing 3-cyclopropyl-13-oxopropanal acetals represented by the following general formulas (I-11) and (I-2).
- the 3-cyctopropyl-13-oxopropanal acetates obtained according to the present invention are synthetic intermediates such as pharmaceuticals and agricultural chemicals, For example, it is useful as a synthetic intermediate for quinoline-based compounds known as inhibitors of HMG-CoA reductase, a rate-limiting enzyme in cholesterol biosynthesis.
- ⁇ -ketoaldehyde derivatives such as 3-cyclopropyl-13-oxopropanal acetal
- Method of obtaining 1,1-diethoxy-1-cyclopropylpropane-3-one Kleinski 'Kimishieski' Journal (Ukr.Khim.Zh.), Vol. 42, No. 4, p 407 (1976)
- (2) Add sodium acetate and methyl formate to a methanol solution of sodium methoxide to obtain sodioformylacetone, and then neutralize it.
- There is known a method of obtaining 4,4-dimethylmethoxy-2-butanone by diacetation see JP-A-6-16991).
- the above-mentioned method (1) has a problem that handling is complicated and the yield is as low as 45% since sodium propyl methyl ketone, which is unstable to water, is used as a raw material. Have. Also, the method (2) has a problem that the raw material is limited in order to obtain the target compound efficiently. For example, when cyclopropyl methyl ketone is used as the raw material, the yield is remarkably high. Decreases. Therefore, none of these methods can be said to be industrially useful methods for producing 3-cyclopropyl-3-oxopropanal acetal. Therefore, an object of the present invention is to provide a method capable of industrially and advantageously producing 3-cyclopropyl-3-oxopropana-l-acetals with high yield.
- the subject is to react cyclopropyl methyl ketone with formate in tetrahydrofuran, then reacting with the general formula (II)
- Ri represents an alkylene group which may have a substituent or an arylene group which may have a substituent
- X and Y are the same or different and represent an oxygen atom or a sulfur atom, respectively. Represents.
- R 2 has an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an aryl group which may have a substituent or a substituent which has a substituent.
- 3-cyclopropyl-1-oxopropanal acetal [hereinafter referred to as 3-cyclopropyl-3-oxopropanal acetal (I-2) or compound (1-2)] Is achieved.
- R i is an alkylene group having 2 to 6 carbon atoms, and X and ⁇ are both oxygen atoms.
- R i is an ethylene group, a trimethylene group, a 2-methyltrimethylene group or a 2,2-dimethyltrimethylene group, and both X and ⁇ are oxygen atoms. .
- the alkylene group represented by Ri is preferably a linear or branched alkylene group having 2 to 6 carbon atoms, for example, an ethylene group, a methylethylene group, a trimethylene group, Examples include a methyltrimethylene group, a 2,2-dimethyltrimethylene group, a tetramethylene group, a pentamethylene group, and the like. These alkylene groups may have a substituent.
- substituents examples include a hydroxyl group; an alkoxyl group having preferably 1 to 4 carbon atoms, such as a methoxy group, an ethoxy group, a propoxy group, a butoxy group;
- the aryl group may have 6 to 10 carbon atoms, and may have a substituent such as a methyl group, a -methylphenyl group, or a naphthyl group.
- the arylene group represented by Ri is preferably an arylene group having 6 to 10 carbon atoms, for example, an o-phenylene group, a 2,3-naphthalenediyl group and the like. These arylene groups may have a substituent.
- substituents examples include a hydroxyl group; an alkoxyl group having preferably 1 to 4 carbon atoms such as a methoxy group, an ethoxy group, a propoxy group and a butoxy group; a methyl group, an ethyl group, a propyl group, an isopropyl group, and a And preferably an alkyl group having 1 to 6 carbon atoms such as a -butyl group, an isobutyl group, a tert-butyl group, an n-pentyl group and an n-hexyl group.
- the alkyl group represented by R 2 is preferably a linear or branched alkyl group having 1 to 6 carbon atoms, more preferably 1 to 4 carbon atoms, for example, a methyl group, an ethyl group, Examples thereof include a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a tert-butyl group, an n-pentynole group, and an n-hexyl group.
- alkyl groups may have a substituent, such as a hydroxyl group; an alkoxyl group having preferably 1 to 4 carbon atoms such as a methoxy group, an ethoxy group, a propoxy group and a butoxy group.
- the cycloalkyl group represented by R 2 is preferably a cycloalkyl group having 3 to 6 carbon atoms, for example, a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and the like.
- cycloanoalkyl groups may have a substituent, for example, a hydroxyl group; a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a tert.
- An alkyl group having preferably 1 to 6 carbon atoms such as —butyl group, n-pentyl group, n-hexyl group; methoxy group, ethoxy group, An alkoxyl group having preferably 1 to 4 carbon atoms such as a oxy group and a butoxy group; a carbon atom which may have a substituent such as a fuel group, a p-methoxyphenyl group, and a p-chlorophenyl group; And 6 to 10 aryl groups.
- the aryl group represented by R 2 is preferably an aryl group having 6 to 10 carbon atoms, such as a phenyl group and a naphthyl group. These aryl groups may have a substituent, for example, a hydroxyl group; a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, An alkyl group preferably having 1 to 6 carbon atoms such as an isoptinole group, a tert-butyl group, an n-pentyl group and an n-hexyl group; a methoxy group, an ethoxy group, An alkoxyl group preferably having 1 to 4 carbon atoms such as a propoxy group and a butoxy group; and preferably having 6 to 6 carbon atoms which may have a substituent such as a phenyl group, a p-methoxyphenyl group or a p-ch
- an aralkyl group preferably having an alkyl group having 1 to 6 carbon atoms as an alkyl moiety and preferably having an aralkyl group having 6 to 10 carbon atoms as an aryl moiety, for example, a benzyl group And a naphthylmethyl group.
- These aralkyl groups may have a substituent. Examples of such a substituent include a hydroxyl group; a methyl group, an ethyl group, an n-propynole group, an isopropylinole group, an n-butylinole group, an isoptinolene group, and a tert-butyl group.
- an alkyl group having 1 to 6 carbon atoms such as a group, n-pentyl group or n-hexyl group; an alkoxyl group preferably having 1 to 4 carbon atoms such as a methoxy group, an ethoxy group, a propoxy group or a butoxy group;
- a substituted or unsubstituted aryl group having 6 to 10 carbon atoms, such as a phenyl group, a p-methoxyphenyl group, and a p-chlorophenyl group is preferred.
- the production of the 3-cyctopropyl propyl-3-oxopropanal acetal (I-1) and the 3-cyclopropyl-13-oxopropanal acetal (I-2) of the present invention is described below.
- the reaction is carried out by reacting cyclopropyl methyl ketone with formate in tetrahydrofuran, and then reacting the compound (II) or the compound (III).
- the reaction (compound (II) or compound (III)) of the next step can be carried out without isolating a water-labile intermediate obtained by reacting cyclopropyl methyl ketone with formate. ), 3-cyclopropyl-13-oxopropanal acetales (I-1) and (1-2) can be produced industrially and advantageously in good yield.
- step 1 the step of reacting cyclopropyl methyl ketone with formate in tetrahydrofuran, preferably in the presence of a base (hereinafter referred to as step 1) will be described.
- Cyclomethyl propyl ketone a starting material, is a known compound and is commercially available Goods may be used.
- Examples of the formate used in the step 1 include alkyl formate having 1 to 6, preferably 1 to 4, carbon atoms of alkyl such as methyl formate, ethyl formate, and propyl formate. Among them, it is preferable to use methyl formate and ethyl formate from the viewpoint of easy availability.
- the amount of formic acid ether used is preferably in the range of 1 to 10 moles with respect to cyclopropyl methyl ketone, from the viewpoint of ease of post-treatment and economy.
- Step 1 is preferably carried out in the presence of a base
- a base examples include alkali metal alkoxides such as sodium methoxide, sodium ethoxide, potassium t-butoxide; lithium hydride, sodium hydride Metal hydrides such as sodium hydroxide and hydrogenation lamps; sodium hydroxide metal, hydroxides such as sodium hydroxide and sodium hydroxide; sodium carbonate, carbonated lithium etc. Metal carbonate and the like. These may be used alone or as a mixture of two or more. Of these, sodium methoxide, sodium ethoxide, and potassium t-toxide are preferably used.
- the amount of the base used is preferably in the range of 1 to 5 moles per mole of propyl methyl ketone, and in the range of 1 to 3 moles from the viewpoint of ease of post-treatment and economy. More preferably, there is.
- tetrahydrofuran is used as a solvent.
- the reaction efficiency is improved, for example, the product is not precipitated and the stirring is easy.
- the amount of tetrahydrofuran to be used is preferably in the range of 1 to 50 times by mass relative to cyclopropylmethyl ketone, and in the range of 1 to 10 times by mass from the viewpoint of easiness of post-treatment and economy. There are more preferred.
- step 1 the compound (II) or the compound (III) used in the following step 2 may be coexistent as long as the reaction is not adversely affected.
- the reaction temperature in step 1 depends on the type of formate used, etc. Usually, it is preferably in the range of 110 to 80 ° C, more preferably in the range of 0 to 50 ° C.
- the reaction time of step 1 varies depending on the reaction temperature, the type of formate used, and the like, but is usually preferably in the range of 0.5 to 10 hours.
- Step 1 is preferably performed in an atmosphere of an inert gas such as argon, helium, or nitrogen.
- step 1 cyclopropyl methyl ketone and formate ester are mixed in a mixed solution of a base suspended in tetrahydrofuran under an atmosphere of an inert gas such as argon, helium, or nitrogen. Can be carried out, for example, by dropping each at the same time or as a mixture thereof and stirring at a predetermined temperature.
- the reaction in step 1 can be performed in either a batch system or a continuous system.
- step 2 the reaction mixture obtained in the step 1 is reacted with the compound (II), preferably under acidic conditions, to give 3-cyclopropyl-13-oxoprobanner lucetals (I-11) or the compound (III)
- step 2 the step [hereinafter referred to as step 2] of reacting to obtain 3 -cyclopropyl-1- 3 -oxopropanal acetal (1-2).
- the compound (II) used in the step 2 for example, ethylene glycol, pinacone, 1,2-propanediole, 1,3-propanediole, 2-methinole 1,3-propanediol, 2,3-propanediol 2—Dimethinole 1,3—Gianole such as propanediol; Menolecabutetano 1 ⁇ ⁇ , 1-me / recaptopropanol, 3-mercapto-1-mercapto alcohol such as 1-propanol; 1,2—Ethandithio Dithiols such as 1,3-propanedithiole and 2,3-butanedithiol.
- ethylene glycol 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 2,2-dimethyl, from the viewpoints of availability and ease of handling It is preferred to use 1,1,1-propanediol.
- Compound (III) used in step 2 includes, for example, methanol, ethanol And thiol such as n- propanone, isopropanol, n -ptano-monole, and methane, and ethanethio-nore. Among these, it is preferable to use methanol and ethanol from the viewpoints of availability and ease of handling.
- the amount of the compound (II) used in the step 2 is preferably in the range of 1 to 50 mol times with respect to the cyclopropylmethyl ketone, from the viewpoint of ease of post-treatment and economy. More preferably, it is in the range of 1 to 5 moles.
- the amount of the compound (III) used in the step 2 is preferably in the range of 2 to 100 mole times with respect to cyclopropylmethyl ketone, from the viewpoint of easiness of post-treatment and economy. More preferably, it is in the range of 2 to 10 mole times.
- a solvent is preferably used.
- the solvent is not particularly limited as long as it does not adversely affect the reaction, and examples thereof include ethers such as tetrahydrofuran, disopropyl ether and t-butyl methyl ether; aromatic hydrocarbons such as benzene, toluene and xylene; Hydrocarbons such as pentane, hexane and heptane; chlorinated hydrocarbons such as dichloromethane and dichloroethane; and anolecols such as methanolic, ethanol / propanolic and the like.
- the compound (II) or the compound (III) used in Step 2 can be used as a solvent.
- the amount of the solvent to be used is preferably in the range of 1 to 50 times by mass relative to cyclopropyl methyl ketone, and in the range of 1 to 10 times by mass from the viewpoint of ease of post-treatment and economy. More preferably, there is.
- step 2 is preferably performed under acidic conditions, and examples of the acid used include mineral acids such as sulfuric acid and phosphoric acid; organic acids such as toluenesulfonic acid and methanesulfonic acid; Is mentioned. Of these, sulfuric acid and methanesulfonic acid are preferably used from the viewpoint of easy handling.
- the amount of the acid used is not particularly limited, but is usually preferably in the range of 0.5 to 2 moles, more preferably in the range of 0.5 to 1.2 moles, based on the base used in step 1. Is more preferred.
- the reaction temperature in step 2 varies depending on the compound (II) or compound (111) used, the type and amount of the acid used, and the like, but is usually preferably in the range of 0 to 100 ° C.
- reaction time of step 2 varies depending on the compound (II) or compound (111) used, acidic conditions and the like, but is usually preferably in the range of 0.5 to 12 hours.
- Step 2 is preferably performed in an atmosphere of an inert gas such as argon, helium, or nitrogen.
- the reaction mixture obtained in step 1 is mixed with the compound (II) or the compound (II) under an atmosphere of an inert gas such as argon, helium, or nitrogen. 1) and, if necessary, by mixing a solvent and, if the reaction is carried out under acidic conditions, by dropping an acid into the reaction system and stirring at a predetermined temperature while maintaining the acidic conditions.
- an inert gas such as argon, helium, or nitrogen.
- the reaction mixture contains alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkaline earth metal hydroxides such as calcium hydroxide, palladium hydroxide and magnesium hydroxide.
- Substance neutralized by adding a basic compound such as an organic acid salt such as sodium formate, sodium acetate, sodium toluenesulfonate, and then hexane, heptane, toluene, methylene chloride, ethyl acetate, diisopropyl ether It can be easily isolated by extracting with an organic solvent such as tenor and t-butyl methyl ether and concentrating the obtained organic layer, and used as it is as an intermediate for the synthesis of pharmaceuticals such as quinoline compounds. be able to. If necessary, the purity can be further increased by distillation, column chromatography, or the like.
- a basic compound such as an organic acid salt such as sodium formate, sodium acetate, sodium toluenesulfonate, and then hexane, heptane, toluene, methylene chloride, ethyl acetate, diisopropyl ether
- the compound (I-1) or the compound (I-2) of the present invention can be reacted with, for example, 4-fluoropheninole-1,2-aminophenyl ketone to deprotect the acetal moiety to give 4- (4 , 1-Fluorophenyl) Production of 1-2-cyclopropylquinoline-13-carbaldehyde Can be.
- the compound can lead to a quinoline-based compound known as an inhibitor of HMG-CoA reductase, a rate-limiting enzyme of cholesterol biosynthesis.
- Example 1 except that the pH in the reaction system was adjusted to 2 to 5. Was performed in the same manner as in Example 1. The obtained reaction mixture was analyzed by an internal standard method using gas chromatography. As a result, it was found that 2-((2-cyclopropyl) -2- (oxoxetinole) -14-methinolate 1,3-dioxane 15.2 g (82 5 mm o 1). The yield was 82.5% based on cyclopropylmethyl ketone.
- Example 1 instead of 7.6 g of sodium methoxide (140 mmo 1), 5.6 g of 60 mass% sodium hydride (3.4 g of pure content, 140 mm o 1) was used. The same operation as in Example 1 was performed except that) was used. The obtained reaction mixture was analyzed by an internal standard method using gas chromatography. As a result, 2-(2-cyclopropyl-1-oxoethyl) 14-methyl-1, 3-dioxane 15.5 g (84.3 mm o 1) had been generated. The yield was 84.3% based on cyclopropyl methyl ketone.
- Example 1 was repeated except that 8.0 g (250 mmo 1) of methanol was used in place of 10.8 g (120 mmo 1) of 2-methyl-1,3-propanediol in Example 1. The same operation as in Example 1 was performed. The obtained reaction mixture was analyzed by an internal standard method using gas chromatography, and as a result, 3-3.4-propinole 3-oxo-propananoresin methinoreacetal 13.4 g (85.0 mm o 1) Had been generated. The yield was 85.0% based on cyclopropyl methyl ketone.
- Example 1 9.7 g (9 Ommo1) of 1,3-propanedithiol was used instead of 10.8 g (120 mmo1) of 2-methyl-1,3-propanediol. The same operation as in Example 1 was performed except for the above. The obtained reaction mixture was analyzed by an internal standard method using gas chromatography. As a result, 2- (2-cyclopropyl-12-oxoethyl) 1-1,3-dithiane 16.2 g (80%) O mm o 1) had been generated. The yield was 80.0% based on cyclopropyl propyl methyl ketone. Comparative Example 1
- 3-cyclopropyl-13-oxopropanal acetate can be industrially and advantageously produced in good yield.
- the present invention is based on Japanese Patent Application No. 2003-10297 filed in Japan, the contents of which are incorporated in full herein.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1568693A4 (en) * | 2002-11-06 | 2007-09-05 | Nissan Chemical Ind Ltd | PROCESS FOR PRODUCING QUINOLINECARBALDEHYDE |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0668258A1 (de) * | 1994-02-09 | 1995-08-23 | Hüls Aktiengesellschaft | Verfahren zur Herstellung von 1-Cyclopropylalkan-1,3-dionen |
EP0922686A1 (de) * | 1997-12-10 | 1999-06-16 | Lonza A.G. | Verfahren zur Herstellung von Ethinylcyclopropan |
-
2004
- 2004-03-01 WO PCT/JP2004/002490 patent/WO2004089928A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0668258A1 (de) * | 1994-02-09 | 1995-08-23 | Hüls Aktiengesellschaft | Verfahren zur Herstellung von 1-Cyclopropylalkan-1,3-dionen |
EP0922686A1 (de) * | 1997-12-10 | 1999-06-16 | Lonza A.G. | Verfahren zur Herstellung von Ethinylcyclopropan |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1568693A4 (en) * | 2002-11-06 | 2007-09-05 | Nissan Chemical Ind Ltd | PROCESS FOR PRODUCING QUINOLINECARBALDEHYDE |
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