WO1997035824A1 - Procede pour preparer des composes dicarbonyle fluores - Google Patents
Procede pour preparer des composes dicarbonyle fluores Download PDFInfo
- Publication number
- WO1997035824A1 WO1997035824A1 PCT/JP1997/000881 JP9700881W WO9735824A1 WO 1997035824 A1 WO1997035824 A1 WO 1997035824A1 JP 9700881 W JP9700881 W JP 9700881W WO 9735824 A1 WO9735824 A1 WO 9735824A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- acid
- fluorine
- hydrogen atom
- formula
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J1/00—Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
- C07J1/0003—Androstane derivatives
- C07J1/0011—Androstane derivatives substituted in position 17 by a keto group
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B39/00—Halogenation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/39—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by esterified hydroxy groups
- C07C205/42—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by esterified hydroxy groups having nitro groups or esterified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
- C07C205/43—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by esterified hydroxy groups having nitro groups or esterified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton to carbon atoms of the same non-condensed six-membered aromatic ring or to carbon atoms of six-membered aromatic rings being part of the same condensed ring system
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
- C07C205/45—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by at least one doubly—bound oxygen atom, not being part of a —CHO group
-
- 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
- C07C45/63—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 halogen; by substitution of halogen atoms by other halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/307—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by introduction of halogen; by substitution of halogen atoms by other halogen atoms
Definitions
- the present invention relates to a novel method for producing a fluorine-containing dicarbonyl compound useful as an intermediate for producing agricultural chemicals or the like.
- the methods (3;) to (5) require a multi-step reaction process, and the fluorination in (3) must be performed at an extremely low temperature, and the yield is low.
- expensive crown ethers must be used, and the reaction time is long and the reaction yield is very low.
- the starting materials are expensive and few.
- the method for fluorinating ketoesters (6) requires a large amount of solvent, which makes the equipment larger.
- the yield is insufficient, many raw materials are wasted, and various by-products are generated, and a complicated separation step is required. It must be said that it is a disadvantageous method.
- an object of the present invention is to provide a method capable of producing a fluorinated dicarbonyl compound simply and in a high yield. Disclosure of the invention
- the present inventors have conducted intensive studies and as a result, when the dicarbonyl compound and the fluorine gas are reacted in the absence of a solvent in the presence of a specific acid, they are contained in high yield. They found that a fluorine dicarbonyl compound can be produced, and completed the present invention.
- the present invention provides a compound represented by the general formula (1):
- R 1 represents a hydrogen atom, an alkyl group or an aryl group which may have a substituent
- R 2 represents a hydrogen atom, a halogen atom, an alkyl group or an aryl group which may have a substituent
- R 3 represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group, an alkoxy group or an aryloxy group, and at least two of R 1 , R 2 and R 3 are combined to form a hetero group Part of the cyclic structure may be formed with or without intervening atoms.
- the following general formula (2) characterized in that the reaction is performed in the presence of two or more acids.
- R la , shaku ⁇ and shaku ⁇ have the same meaning as! ⁇ 1 , R 2 and R 3 respectively, or when R ', R 2 and R 3 are each a hydrogen atom, the hydrogen atom is fluorine
- R 1 , R 2 and R 3 are each an optionally substituted alkyl group, one of the hydrogen atoms on the carbon at the position of the carbonyl group may be substituted. Or two may be substituted with a fluorine atom.
- examples of the alkyl group include those having 1 to 20 carbon atoms, and those having 1 to 10 carbon atoms are preferable.
- a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a pentyl group, a hexyl group and the like are preferable.
- Examples of the substituent of the alkyl group which may have a substituent include a halogen atom, a hydroxyl group, a cyano group, an aryl group, an acyl group, an alkoxy group, an aryloxy group, an acyloxy group, an alkoxycarbonyl group, and an aryloxy group.
- Examples include a carbonyl group, an alkane sulfonyl group, an arylsulfonyl group, and an acylamino group.
- Examples of the aryl group include those having 6 to 14 carbon atoms, and those having 6 to 10 carbon atoms are preferable. For example, a phenyl group, a naphthyl group and the like are preferable.
- Examples of the substituent of the aryl group which may have a substituent include, for example, an alkyl group, a halogen atom, a cyano group, a nitro group, an acyl group, an acyloxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, Examples thereof include an alkane sulfonyl group and an aryl sulfonyl group.
- the aryl moiety in the aryloxy group, aryloxycarbonyl and arylsulfonyl groups is also the same as those aryl groups.
- Examples of the alkoxy group include those having 1 to 20 carbon atoms, and those having 1 to 10 carbon atoms are preferable. For example, a methoxy group, an ethoxyquin group, a propoxy group, an isopropoxy group, a butoxy group and the like are preferable.
- Examples of the substituent of the optionally substituted alkoxy group include the same groups as the substituents of the above-mentioned alkyl group.
- the alkoxy moiety in the alkoxycarbonyl group is the same as the alkoxy group.
- Examples of the halogen atom include fluorine, chlorine, bromine, and iodine.
- Examples of the acyl group include aromatic acyl groups and aliphatic acyl groups, and examples thereof include aromatic acyl groups having 7 to 15 carbon atoms, and lipophilic acyl groups. Examples thereof include an aliphatic acyl group having 1 to 20 carbon atoms. Examples of the acyl moiety in the acyloxy group and the acylamino group include those similar to these acyl groups. Examples of the alkane moiety in the alkanesulfonyl group include the same as the above-mentioned alkyl group.
- Examples of cyclic structures that can be formed by combining R 1 , R 2, and R 3 can be monocyclic, bicyclic, or polycyclic structures having 3 to 20 members.
- the dicarbonyl compound represented by the general formula (1) which is a raw material, is a compound that can be easily obtained industrially or can be easily synthesized by an ordinary synthesis method.
- Examples of the dicarbonyl compound of the general formula (1) include the following.
- Ph represents a phenyl group.
- the hydrogen atom fluorinated by the method of the present invention is the hydrogen atom on the carbon atom at the position of the carbonyl group, or the hydrogen atom on the carbon atom between the two carbonyl groups is most susceptible to fluorination . Further, according to the method of the present invention, a difluoro compound is produced or its yield is low, so that the method of the present invention is useful as a method for producing a monofluoro compound.
- a compound in which the two hydrogen atoms are fluorinated is generated as the difluoro body.
- a compound in which the hydrogen atom on one of the carbon atoms outside the two carbonyl groups is fluorinated is also formed.
- R 1 include a group represented by R lb CH 2 — (where R lb represents a hydrogen atom, an alkyl group which may have a substituent or an aryl group).
- R 2 include a hydrogen atom.
- R 3 one ⁇ _R 3b (wherein R 3b is exemplified by an alkyl group or Ariru group which may have a substituent.
- the yield of the compound (2b-1) is high, and it is particularly useful as a method for producing the compound (2b-1).
- the fluorine gas used in the present invention usually has severe reactivity when used as it is, it is preferable to dilute the fluorine gas with an inert gas and use it as a mixed gas of the fluorine gas and the inert gas.
- the inert gas used for dilution include nitrogen, helium, argon, and carbon dioxide
- the mixed gas has an inert gas volume of 99.9 to 50% by volume in the total amount. It is preferable to use it within the range.
- the acid used in the present invention is one or two selected from sulfonic acids supported on a polymer such as trifluoromethanesulfonic acid, methanesulfonic acid, hydrofluoric acid, sulfuric acid, trifluoroacetic acid, boron trifluoride and polyacrylic acid. Although it is more than one kind, in the present invention, it is particularly preferable to use trifluoromethanesulfonic acid or hydrofluoric acid from the viewpoint of yield, selectivity and economy.
- the amount of these acids used can be 1 to 100% by weight based on the dicarbonyl compound (1) as a starting material, but is 5 to 20% by weight in view of economy and addition effect. Is preferred.
- the reaction temperature in the present invention is -80 ⁇ !
- the temperature is preferably set to ⁇ 20 ° C. to 40 ° C., in order to allow the reaction to proceed efficiently and to obtain the target compound in high yield.
- the obtained fluorinated dicarbonyl compound can be purified by a conventional method, for example, distillation.
- Example 1 In an ice-cooled bath at 0 ° C, 2.60 g of methyl 3-oxopentanoate (1a) (0.3 kg of trifluoromethanesulfonate in 20 countries and 0.30 g of 10.5 weight) was added. While stirring, fluorine gas diluted to 10% by volume with nitrogen gas was flown at a flow rate of 25 mZ. The amount of fluorine gas used was 112 2 ⁇ ⁇ (5 Ommoi).
- methyl 3-oxopentanoate (la) 2.60 g (20 occluded 0) was stirred while fluorine gas diluted to 10% by volume with nitrogen gas was added for 25 minutes. At a flow rate of The amount of the fluorine gas used was 1 1 2 (50 sleep o).
- reaction mixture was quantified by gas chromatography to find that the starting material (1a) 15.2%, methyl 2,2-difluoro-13-oxopentanoate (2a 13.5%, methyl 2-fluoro-3-oxopentane) Evening compound (2b) 55.2 Methyl 2,4-difluoro-3-oxopenone compound (2c) The yield was 16.1%.
- Examples 2 to 12 Compound (2a), compound (2b) and compound (2c) were produced in the same manner as in Example 1 except that the acids shown in Tables 1 and 2 were used. Incidentally, nitrogen gas was used for dilution of the fluorine gas in the same manner as in Example 1.
- Fluorine-containing dicarbonyl compounds were produced in the same manner as in Example 1 using the raw materials, acids, and the like shown in Table 3.
- the desired fluorinated dicarbonyl compound can be produced without using a solvent, so that the size of the reaction apparatus is reduced. Further, by adding a specific acid, the yield and selectivity of the target compound are improved as compared with the case where the reaction is carried out without a solvent without adding an acid. Further, these effects have an advantage that the production cost of the target compound is reduced.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Furan Compounds (AREA)
- Hydrogenated Pyridines (AREA)
- Pyrane Compounds (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97907369A EP0891962B1 (en) | 1996-03-26 | 1997-03-18 | Process for the preparation of fluorinated dicarbonyl compounds |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/69954 | 1996-03-26 | ||
JP6995496A JP3817605B2 (ja) | 1996-03-26 | 1996-03-26 | 含フッ素ジカルボニル化合物の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997035824A1 true WO1997035824A1 (fr) | 1997-10-02 |
Family
ID=13417564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/000881 WO1997035824A1 (fr) | 1996-03-26 | 1997-03-18 | Procede pour preparer des composes dicarbonyle fluores |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0891962B1 (ja) |
JP (1) | JP3817605B2 (ja) |
WO (1) | WO1997035824A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6455728B1 (en) * | 1999-11-01 | 2002-09-24 | Air Products And Chemicals, Inc. | Direct fluorination process for preparing high purity 2-fluoro-1,3-dicarbonyl compounds using oxygen as a radical scavenger |
US7019162B2 (en) | 2000-12-26 | 2006-03-28 | Tosoh F-Tech, Inc. | Process for preparing 2-fluoro-3-oxoalkylcarboxylic acid ester |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0911315B1 (en) * | 1997-10-21 | 2003-06-11 | Givaudan SA | Beta-ketoester |
WO2001030740A1 (fr) * | 1999-10-26 | 2001-05-03 | Daikin Industries Ltd. | Procede de production de composes a base de fluorodicarbonyle |
JP4517454B2 (ja) * | 2000-06-01 | 2010-08-04 | 宇部興産株式会社 | 4−(1−フルオロエチル)チアゾール−5−カルボン酸アミド誘導体及び農園芸用の有害生物防除剤 |
US6307105B1 (en) * | 2000-07-19 | 2001-10-23 | Air Products And Chemicals, Inc. | High purity preparation of fluorinated 1,3-dicarbonyls using BDM (bis-fluroxy difluoromethane) |
JP4717204B2 (ja) * | 2000-12-26 | 2011-07-06 | 東ソ−・エフテック株式会社 | 2−フルオロ−3−オキソアルキルカルボン酸エステルの製造方法 |
CN108218702B (zh) * | 2017-12-28 | 2020-10-09 | 湖北卓熙氟化股份有限公司 | 2-氟乙酰乙酸乙酯的制备方法 |
CN109734633B (zh) * | 2019-01-17 | 2020-07-28 | 联化科技股份有限公司 | 一种催化氟化高效制备磺酰氟类化合物的方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994010120A1 (en) * | 1992-10-30 | 1994-05-11 | Daikin Industries, Ltd. | Process for producing fluorinated dicarbonyl compound |
-
1996
- 1996-03-26 JP JP6995496A patent/JP3817605B2/ja not_active Expired - Fee Related
-
1997
- 1997-03-18 WO PCT/JP1997/000881 patent/WO1997035824A1/ja active IP Right Grant
- 1997-03-18 EP EP97907369A patent/EP0891962B1/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994010120A1 (en) * | 1992-10-30 | 1994-05-11 | Daikin Industries, Ltd. | Process for producing fluorinated dicarbonyl compound |
Non-Patent Citations (1)
Title |
---|
See also references of EP0891962A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6455728B1 (en) * | 1999-11-01 | 2002-09-24 | Air Products And Chemicals, Inc. | Direct fluorination process for preparing high purity 2-fluoro-1,3-dicarbonyl compounds using oxygen as a radical scavenger |
US7019162B2 (en) | 2000-12-26 | 2006-03-28 | Tosoh F-Tech, Inc. | Process for preparing 2-fluoro-3-oxoalkylcarboxylic acid ester |
Also Published As
Publication number | Publication date |
---|---|
EP0891962A1 (en) | 1999-01-20 |
JP3817605B2 (ja) | 2006-09-06 |
EP0891962B1 (en) | 2002-09-18 |
EP0891962A4 (en) | 1999-09-01 |
JPH09255611A (ja) | 1997-09-30 |
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