WO2005102972A1 - フルオロアルキルケトンの水和物の製造方法 - Google Patents
フルオロアルキルケトンの水和物の製造方法 Download PDFInfo
- Publication number
- WO2005102972A1 WO2005102972A1 PCT/JP2005/006905 JP2005006905W WO2005102972A1 WO 2005102972 A1 WO2005102972 A1 WO 2005102972A1 JP 2005006905 W JP2005006905 W JP 2005006905W WO 2005102972 A1 WO2005102972 A1 WO 2005102972A1
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- WIPO (PCT)
- Prior art keywords
- halogen
- reaction
- salt
- oxidizing agent
- general formula
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/48—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by oxidation reactions with formation of hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
-
- 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
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/30—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with halogen containing compounds, e.g. hypohalogenation
Definitions
- the present invention relates to a method for producing a fluoroalkyl ketone, in particular, a hydrate of hexafluoroacetone (hereinafter sometimes abbreviated as “HFA”).
- HFA hexafluoroacetone
- the present invention relates to a method for producing a hydrate of HFA for the effective use of ropionic acid.
- HFA hydrate is useful as a synthetic intermediate for various fluorine compounds.
- HFA can be used as a rubber crosslinking agent or a fluorine-containing polyimide monomer by reacting with various aromatic compounds.
- HFA hydrate is reduced to hexafluoroisopropanol by a hydrogen reduction reaction and can be used as a raw material for anesthetics.
- Patent Documents 1 to 4 propose a method for isomerizing hexafluoropropylene oxide.
- Hexafluoropropylene oxide has a problem in that the yield of cisfluoridone, which is known to be obtained by oxygen oxidation of hexafluoropropene, is low and expensive.
- Patent Documents 5 to 8 and the like As another method, a method of oxidizing hexafluorothioacetone dimer (Patent Documents 5 to 8 and the like) is also known, but the yield is low and purification is difficult. There is a problem. Also known is a method of fluorinating hexaclotone acetone with HF. Power purification is not easy! There are problems of (1) and (2) (Patent Document 9).
- Patent Document 10 discloses a method for oxidizing oxygen with octafluoroisobutyl methyl ether in the presence of an activated carbon catalyst. Although it was possible to obtain oroacetone, it was apparent that the catalytic activity of activated carbon deteriorated significantly and was not industrially feasible. Besides this, Patent Documents 11 to 14, etc. disclose methods for producing octafluoroisobutyl methyl ether derivative hexafluoroacetone, but in any case, the yield is low and the cost is low. It is not satisfactory as a method for producing fluoroacetone.
- Non-Patent Document 1 reports the reaction of reacting a salt of a carboxylic acid with fluorine gas in an aqueous solution to react with fluorine gas, but such a decarboxylation reaction does not proceed with chlorine gas. Is described.
- Patent Document 1 U.S. Pat.
- Patent Document 2 JP-A-53-25512
- Patent Document 3 JP-A-58-62130
- Patent Document 4 WO 03/008366
- Patent Document 5 U.S. Pat.No. 4,337,361
- Patent Document 6 US Patent No. 4334099
- Patent Document 7 JP-A-57-158736
- Patent Document 8 JP-A-57-203026
- Patent Document 9 Japanese Patent Publication No. 40-27173
- Patent Document 10 JP-A-01-203339
- Patent Document 11 JP-A-61-277645
- Patent Document 12 JP-A 64-26527
- Patent Document 13 Japanese Patent Publication No. 9-509425
- Patent Document 14 Japanese Patent Application Laid-Open No. 2001-81056
- Non-Patent Document 1 J. Org. Chem. 34, 2446 (1969)
- An object of the present invention is to easily produce a hydrate of a fluoroalkyl ketone in a high yield.
- the present inventors have proposed that a salt of a fluoroalkylhydroxycarboxylic acid is halogen or halogen. It has been found that a hydrate of the corresponding ketone is formed when reacted with a system oxidizing agent.
- the present invention relates to the following method.
- n and m each represent 0 to 10; and reacting a salt of the compound represented by the general formula (2) with a compound of the formula (2):
- 2-hydroxyf. HFA hydrate which is a useful substance, can be obtained in high yield from the salt of ropionic acid.
- M represents a monovalent (M +), divalent ( 1/2 M 2+ ) or trivalent ( 1/3 M 3+ ) ion
- the present inventors have examined the conditions of halogenation in detail, and found that the carboxylic acid compound of the general formula (1) used hypochlorite Z hypobromite as a halogen-based oxidizing agent other than halogen alone. It was also found that hexafluoroacetone hydrate was formed. Hypochlorite generates chlorine in an acidic manner, so chlorine may be generated in the reaction system.However, this reaction proceeds even in alkaline conditions, and the reaction with hypochlorite occurs. It is not clear what kind of mechanism it is going on.
- a salt of the compound of the general formula (1) is represented by the following general formula (1A).
- M represents a monovalent (M +), divalent ( 1/2 M 2+ ) or trivalent ( 1/3 M 3+ ) ion, and is preferable.
- M + is a monovalent cation such as L ", K-cho, Na +, NH +, Ag +
- divalent cations such as l / 2Mg 2+ , l / 2Ca 2+ , l / 2Sr 2+ , l / 2Ba 2+ , l / 2Pb 2+ , l / 2Cu 2+ and 3 such as 1 / 3A1 3+ Shows a multivalent cation.
- Salts other than those specifically exemplified above can be easily obtained from the compound of the general formula (1) or the salt of the general formula (1A) according to a conventional method.
- HFA hydrate in which both n and m are 0 is a particularly useful compound, and 3,3,3-trifluoro-2-trifluoromethyl- 2-hydroxyf.
- a method for producing lopionic acid ester is disclosed in JP-A-61-286348, JP-A-2002-234860, and the like, as described in V, by reacting octafluoroisobutene with methanol. It is known that isobutyl methyl ether is reacted with an alkali metal hydroxide and dehydrofluorinated to give heptafluoroisobutyr methyl ether, which is obtained by oxidation. .
- the carboxylic acid salt of the raw material obtained by hydrolyzing the ester portion from the lopionate is a salt such as a salt of Li, K, Na, Mg, Ca, Sr, Ba, Pb, Cu, Al, NH or Ag.
- a salt of Li, K, Na, Mg, Ca, Sr, Ba, Pb, Cu, Al, NH or Ag is a salt such as Li, K, Na, Mg, Ca, Sr, Ba, Pb, Cu, Al, NH or Ag.
- Li salt, K salt, Na salt, Ca salt and Mg salt are preferable, and Na salt and K salt are more preferable.
- the raw material carboxylate can be used by purifying it by a conventional method such as extraction with a solvent. Hydrolysis of methyl ester with an alkali metal hydroxide such as KOH or NaOH The used solution may be used as it is. The excessively used hydroxide may be used after being neutralized with an acid such as hydrochloric acid or sulfuric acid in order to accelerate the decomposition of the halogen when reacting with the halogen.
- an alkali metal hydroxide such as KOH or NaOH
- the excessively used hydroxide may be used after being neutralized with an acid such as hydrochloric acid or sulfuric acid in order to accelerate the decomposition of the halogen when reacting with the halogen.
- the carboxylate uses a carboxylic acid as a raw material and forms a salt in the reaction solution.
- Water is preferred as the solvent for the nodogenation reaction, but 3,3,3-trifluoro-2-trifluoromethyl-2-hydroxyphenyl is contained in the aqueous solution.
- an organic solvent such as methanol, ethanol, acetate, dioxane, tetrahydrofuran, or acetonitrile, which is used when synthesizing a carboxylic acid salt from a ropionate, is contained.
- the reaction temperature is not particularly limited as long as it is equal to or higher than the freezing point of the solvent.
- the reaction can be usually carried out at about -20 to 100 ° C, but is preferably about -5 to 50 ° C.
- the reaction temperature is not particularly limited as long as the water does not solidify due to freezing point depression, and can be cooled to about 20 ° C, but is usually about -5 to 80 ° C, preferably 0 to 80 ° C. It is around 50 ° C. If the reaction temperature is too high, undesired side reactions occur. If the reaction temperature is too low, the loss of halogen or halogen-based oxidizing agent increases. The optimum temperature depends on the halogen or halogen-based oxidizing agent. When chlorine is used as the halogen or halogen-based oxidizing agent, the reaction temperature is preferably about 30-50 ° C.
- the raw material concentration in the reaction solution there is no particular limitation on the raw material concentration in the reaction solution, but it is preferable to carry out the reaction at 5 to 60 mass%. In a dilute solution, the reaction efficiency of halogen is worse and the loss increases. Therefore, a higher concentration is preferable. Even if the carboxylate is saturated and precipitated and the halogen is removed in a state where the carboxylate is saturated, the reaction proceeds without any particular problem.
- the halogen or the halogen-based oxidizing agent is not particularly limited, but fluorine, chlorine, and bromine are preferably used as the halogen.
- As the halogen-based oxidizing agent sodium hypochlorite, lithium hypochlorite, potassium hypochlorite, Hypochlorites such as calcium hypochlorite and hypobromite such as sodium hypobromite, lithium hypobromite, potassium hypobromite and calcium hypobromite are preferably used.
- Chlorine is particularly preferred due to its low cost. Although purified gas can be used as it is as chlorine, it is generated in the reaction system. It can be used for the reaction while growing.
- a method for generating chlorine in the reaction system for example, there is a method in which a chloride of an alkali metal or an alkaline earth metal is added to the reaction system, and this is electrolyzed. The same method can be applied to bromine.
- F gas is diluted with a gas that is inert to fluorine.
- the diluent gas can be selected from nitrogen, helium, air, or fluoralkane, perfluoroalkane, or perfluoroketone, but nitrogen is the most preferable in terms of cost.
- the concentration of F is 1 ⁇ 30mass%, preferably 4-20mass%.
- the F2 concentration is high, severe undesired side reactions such as combustion are likely to occur, which is dangerous. Although there is no particular problem in the case of a dilute gas, the entrainment loss of the target substance such as HFA hydrate by the diluent gas increases.
- the amount of halogen or halogen-based oxidizing agent used in the reaction is not particularly limited, but it is preferable to carry out the reaction in an amount of about 0.5 to about 10 molar equivalents. More preferably, from about 0.9 to about 2 molar equivalents. If the equivalent of the halogen used is increased, the transfer ratio of the raw material can be improved.
- the rate of addition of the halogen or halogen-based oxidizing agent is not particularly limited, but it is generally the case that one equivalent of the halogen is added over a period of about 0.5 to 50 hours, more preferably about 0.5 to 10 hours. It is a target.
- the flow rate is preferably 0.1 to 5 times the capacity of the reactor per minute.
- the flow rate can be in the range of 0.01 to 5 times, preferably 0.1 to 1 time, per minute of the capacity of the reactor.
- the flow rate can be in the range of 0.01 to 5 times, preferably 0.1 to 1 time, per minute of the capacity of the reactor.
- about 0.5 to about 10 molar equivalents of bromine (liquid) may be added to the reaction solution by dropping or the like.
- the reaction time is not particularly limited, and the reaction can be usually performed for about 0.5 to 50 hours.
- This reaction can be carried out continuously by supplying the carboxylic acid solution and the halogen as the raw materials to the reactor while extracting the reaction solution.
- the pH of the solution, particularly the aqueous solution or aqueous solution, used in the present reaction is preferably 3.0 to
- the alkali to be added is preferably an alkali metal or alkaline earth metal carbonate, hydrogencarbonate, sesquicarbonate, phosphate, hydroxide or the like.
- Carbonates and bicarbonates are particularly preferred because they do not decompose hydrates of halogen or fluoroalkyl ketone (particularly hexafluoroacetone hydrate).
- the addition amount of the alkaline conjugate is about 0.5 to 5.0 equivalents, preferably about 1.0 to 2.0 equivalents, to the halogen or the halogen-based oxidizing agent.
- a buffer may be used as water.
- Preferred buffers include organic or inorganic acids such as citrate, phosphate, succinate, Tris salt (eg, Tris hydrochloride), borate, acetate, lactate, propionate, and the like. And a mixture of the corresponding acid and the corresponding acid.
- the hydrate of a fluoroalkyl ketone which is the object of the present invention, can be prepared by a known method, for example, HFA hydrate as disclosed in JP-A-57-81433, salted calcium and the like.
- the salt can be extracted with an ethereal solvent such as diisopropyl ether or methyl tert-butyl ether, and then separated by distillation with an organic solvent.
- the potassium salt solution of 3,3,3-trifluoro-2--2-trifluoromethyl-2-hydroxypropionic acid prepared in Reference Example 1 and water were added to a 100 ml four-necked flask.
- the pH of the mixed solution was 13 due to excess KOH used during the hydrolysis.
- F2 diluted to 5.7 vol% with nitrogen was blown into the mixture under ice-cooling and stirring to carry out a reaction. After flowing a predetermined amount of F2, the reaction system was purged with nitrogen, and the reaction solution was analyzed.
- Example 9 A 100 ml PFA bottle is charged with 30.9 g (123.6 mmol) of potassium salt of 3,3,3-trifluoro-2-methyl-2-hydroxypropionate and 71.7 g of an aqueous solution containing 6 g (80 mmol) of KCl. A direct current of 1 A (8.0 to 8.2 V) was applied to this through a platinum electrode. After electrolysis for 9 hours, the reaction solution was quantified by NMR analysis. The conversion of the reaction was 90% and the selectivity was 99% or more. The reaction was performed at room temperature, but the internal temperature of the reaction solution was 39 to 41 ° C. What is the pH at the end of the reaction? Was ⁇ 8.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800116810A CN1942422B (zh) | 2004-04-19 | 2005-04-08 | 氟烷基酮的水合物的制造方法 |
US11/578,523 US7598425B2 (en) | 2004-04-19 | 2005-04-08 | Method for producing hydrate of fluoroalkyl ketone |
EP05728496A EP1757572A4 (en) | 2004-04-19 | 2005-04-08 | PROCESS FOR PRODUCING FLUOROALKYLCETONE HYDRATE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004123045A JP4396831B2 (ja) | 2004-04-19 | 2004-04-19 | フルオロアルキルケトンの水和物の製造方法 |
JP2004-123045 | 2004-04-19 |
Publications (1)
Publication Number | Publication Date |
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WO2005102972A1 true WO2005102972A1 (ja) | 2005-11-03 |
Family
ID=35196893
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/006905 WO2005102972A1 (ja) | 2004-04-19 | 2005-04-08 | フルオロアルキルケトンの水和物の製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7598425B2 (ja) |
EP (1) | EP1757572A4 (ja) |
JP (1) | JP4396831B2 (ja) |
CN (1) | CN1942422B (ja) |
WO (1) | WO2005102972A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5315609B2 (ja) | 2006-06-05 | 2013-10-16 | ダイキン工業株式会社 | 新規カルボン酸化合物、その用途及びその製造方法 |
JP5114880B2 (ja) | 2006-07-06 | 2013-01-09 | ダイキン工業株式会社 | 新規α−フルオロメトキシカルボン酸エステル、該α−フルオロメトキシカルボン酸エステルの製造方法及びセボフルランの製造方法 |
JP2009149591A (ja) * | 2007-05-28 | 2009-07-09 | Daikin Ind Ltd | フルオロアルキルアルコールの製造方法 |
JP5163064B2 (ja) | 2007-11-13 | 2013-03-13 | ダイキン工業株式会社 | 新規カルボン酸エステル、その用途及びその製造方法 |
US9359277B2 (en) | 2011-03-22 | 2016-06-07 | Purdue Research Foundation | Compositions and processes of preparing and using the same |
CN107915581A (zh) * | 2017-12-08 | 2018-04-17 | 西安近代化学研究所 | 一种2,2,3,3,3‑五氟丙醇的制备方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6335537A (ja) * | 1986-07-31 | 1988-02-16 | Nippon Mektron Ltd | ヘキサフルオロアセトン水和物の製造法 |
JPH0769959A (ja) * | 1993-08-26 | 1995-03-14 | Kuraray Co Ltd | 2−ノルボルナノンの製造方法 |
JPH08231448A (ja) * | 1994-12-06 | 1996-09-10 | Cerestar Holding Bv | キシリトールの生成方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US3321515A (en) | 1963-04-24 | 1967-05-23 | Du Pont | Method of making fluorinated carbonyl compounds |
JPS5325521A (en) | 1976-08-23 | 1978-03-09 | Dai Ichi Seiyaku Co Ltd | Preparation of pantethine |
US4334099A (en) | 1980-12-18 | 1982-06-08 | Allied Corporation | Preparation of hexafluoroacetone from hexafluorothioacetone dimer |
US4337361A (en) | 1981-02-27 | 1982-06-29 | Allied Corporation | Liquid phase synthesis of hexafluoroacetone |
US4337362A (en) | 1981-06-08 | 1982-06-29 | Allied Corporation | Conversion of hexafluorothioacetone dimer into hexafluoroacetone |
JPS5862130A (ja) | 1981-10-09 | 1983-04-13 | Asahi Glass Co Ltd | ヘキサフルオロアセトンの製法 |
JPS61277645A (ja) | 1985-06-03 | 1986-12-08 | Nippon Mektron Ltd | ヘキサフルオロアセトンの製造法 |
JPH0788594B2 (ja) * | 1986-07-31 | 1995-09-27 | 日本メクトロン株式会社 | ヘキサフルオロアセトン水和物の製造法 |
JPH085823B2 (ja) | 1988-02-05 | 1996-01-24 | 日本メクトロン株式会社 | ヘキサフルオロアセトンまたはその水和物の製造法 |
JPS6426527U (ja) | 1987-08-11 | 1989-02-15 | ||
EP0640579B1 (en) | 1993-08-26 | 1998-04-22 | Kuraray Co., Ltd. | Process for producing optically active 2-norbornanone |
US5466879A (en) | 1994-02-28 | 1995-11-14 | Minnesota Mining And Manufacturing Company | Production of hexafluoroacetone and its oxime |
JP4534274B2 (ja) | 1999-09-13 | 2010-09-01 | ユニマテック株式会社 | ヘキサフルオロアセトンまたはその水和物の製造法 |
ATE345321T1 (de) | 2001-07-19 | 2006-12-15 | Daikin Ind Ltd | Verfahren zur herstellung von hexafluoraceton und dessen hydrat |
-
2004
- 2004-04-19 JP JP2004123045A patent/JP4396831B2/ja not_active Expired - Fee Related
-
2005
- 2005-04-08 EP EP05728496A patent/EP1757572A4/en not_active Withdrawn
- 2005-04-08 US US11/578,523 patent/US7598425B2/en not_active Expired - Fee Related
- 2005-04-08 WO PCT/JP2005/006905 patent/WO2005102972A1/ja active Application Filing
- 2005-04-08 CN CN2005800116810A patent/CN1942422B/zh not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6335537A (ja) * | 1986-07-31 | 1988-02-16 | Nippon Mektron Ltd | ヘキサフルオロアセトン水和物の製造法 |
JPH0769959A (ja) * | 1993-08-26 | 1995-03-14 | Kuraray Co Ltd | 2−ノルボルナノンの製造方法 |
JPH08231448A (ja) * | 1994-12-06 | 1996-09-10 | Cerestar Holding Bv | キシリトールの生成方法 |
Non-Patent Citations (1)
Title |
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See also references of EP1757572A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20080262273A1 (en) | 2008-10-23 |
JP4396831B2 (ja) | 2010-01-13 |
CN1942422B (zh) | 2010-07-07 |
US7598425B2 (en) | 2009-10-06 |
EP1757572A1 (en) | 2007-02-28 |
JP2005306747A (ja) | 2005-11-04 |
CN1942422A (zh) | 2007-04-04 |
EP1757572A4 (en) | 2008-04-09 |
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