WO1998028309A1 - Procede d'elaboration de 1-alkoxy-1-trimethylsilyloxycyclopropanes - Google Patents
Procede d'elaboration de 1-alkoxy-1-trimethylsilyloxycyclopropanes Download PDFInfo
- Publication number
- WO1998028309A1 WO1998028309A1 PCT/JP1997/004705 JP9704705W WO9828309A1 WO 1998028309 A1 WO1998028309 A1 WO 1998028309A1 JP 9704705 W JP9704705 W JP 9704705W WO 9828309 A1 WO9828309 A1 WO 9828309A1
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- WO
- WIPO (PCT)
- Prior art keywords
- reaction
- sodium
- ethyl
- alkoxy
- metallic sodium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
- C07F7/1872—Preparation; Treatments not provided for in C07F7/20
- C07F7/188—Preparation; Treatments not provided for in C07F7/20 by reactions involving the formation of Si-O linkages
Definitions
- the present invention relates to a method for producing 1-alkoxy-1-trimethylsilyloxycyclo useful as a pharmaceutical intermediate, a pesticide intermediate or a production intermediate of a fragrance or the like. It relates to a method for producing propane. Background art
- a method for synthesizing 1-alkoxy-1trimethylsilyloxycyclopropanes is to react sandy metallic sodium with 3-methylpropionate in an ether solvent in the presence of trimethylchlorosilane.
- this method involves adding sodium metal in toluene or xylene.
- the mixture is heated and melted, stirred and cooled to produce sandy metallic sodium, the supernatant solvent is taken out, the residual metallic sodium is washed several times, and the solvent is replaced with ether.
- metallic sodium easily ignites due to the incorporation of moisture, has a low flash point, easily forms an explosive peroxide, and uses a large amount of ether which is difficult to recycle as a reaction solvent. Thus, it was difficult to carry out on an industrial scale, even if it could be performed in a laboratory flask.
- An object of the present invention is to provide a method which is industrially suitable for producing 1-alkoxy-1-trimethylsilyloxycyclopropane and which can be sufficiently satisfied in yield, purity and cost. is there.
- the inventors of the present invention have conducted intensive studies to solve the problems of the conventional laboratory-based synthesis method as described above, and surprisingly, a hydrocarbon-based solvent that is industrially easy to handle The particulate sodium metal dispersed in the
- the present invention provides a particulate metal sodium dispersed in a hydrocarbon solvent, General formula
- R i and R 2 each independently represent a hydrogen atom or a lower alkyl group
- R 3 represents a lower alkyl group
- X represents a halogen atom
- the object of the present invention has been achieved by providing a method for producing 1-alkoxy-l-trimethylsilicalioxycyclopropane represented by the following formula: BEST MODE FOR CARRYING OUT THE INVENTION
- the use of particulate metal sodium dispersed in a hydrocarbon-based solvent makes it possible to use a hydrocarbon-based solvent without using an ether-based solvent that is not industrially preferable, regardless of the laboratory.
- the reaction proceeded sufficiently to almost the same or higher yields as when an ether-based solvent was used with only the solvent, and this is a feature of the present invention.
- the preparation of the dispersed particulate metal sodium will be described.
- the particulate sodium metal dispersed in the hydrocarbon-based solvent used in the method of the present invention is obtained by heating metal sodium in a hydrocarbon-based solvent having a boiling point equal to or higher than the melting point of metallic sodium using an appropriate pulverizer. After melting and further stirring at high speed, It can be obtained by standing and allowing to cool.
- hydrocarbon solvent used herein examples include aromatic hydrocarbons having a boiling point equal to or higher than the melting point of metallic sodium, for example, toluene, xylene, mesitylene, ethylbenzene, isoprenepyrubenzene, etc .; Linear or branched hydrocarbons such as, for example; alicyclic hydrocarbons such as methylcyclohexane and ethylcyclohexane; for example, 1,2,3,4-tetrahydronaphthalene and decahydronaphthylene
- a mixture of hydrocarbons such as a bicyclic hydrocarbon or a ketone, a high-boiling aromatic hydrocarbon compound (trade name: Nippon Petrochemical Co., Ltd.) Can be used.
- the use of an aromatic hydrocarbon solvent is suitable, and among them, the use of toluene or xylene is particularly suitable.
- the amount of the above-mentioned hydrocarbon solvent used for forming fine particles of metal sodium can be set so that the weight of metal sodium is in the range of 0.5 to 30% with respect to the weight of hydrocarbon solvent. It is preferably in the range of 1 to 10%.
- the particle size of the generated particulate metallic sodium varies depending on the stirring speed of the pulverizer, the shape of the stirrer, the stirring time, and the like, and can be controlled by changing these conditions, and is used for the reaction of the method of the present invention.
- Suitable is sodium metal particulate having an average particle diameter of 80 / _im or less, and among them, sodium metal particulate having an average particle diameter in the range of 10 to 50 m is preferred. Can be.
- the type of the fine pulverizer is not particularly limited as long as the particle size of the fine metal sodium can be set in the above range.
- a dispersing agent In order to obtain such particulate metal sodium, it is effective to add a small amount of a dispersing agent.
- usable dispersing agents include decanoic acid, lauric acid, palmitic acid, stearic acid, oleic acid, and linoleic acid.
- unsaturated fatty acids having 10 to 20 carbon atoms such as linolenic acid, and linolenic acid
- Salts such as gum salt, potassium salt, barium salt and aluminum salt can be mentioned as suitable.
- the amount of the dispersant added is in the range of 0.01 to 0.1% by weight, preferably 0.02 to 0.08% by weight, based on the metal sodium used.
- the average particle diameter of the particulate metal sodium referred to in the present specification is obtained by sampling the obtained slurry of the particulate metal sodium, preparing a sample, taking a micrograph with a scale, etc., and then taking a photograph. Approximately 2 000 to 250 000 (all of the particles shown in the picture) of the metallic sodium particles were measured in the specified direction, and the diameter was determined by converting it to a scale. The average is calculated above (the average particle size is hereafter agreed).
- the 3-halogenocarboxylic acid ester used in this reaction is represented by the general formula
- 3-halogenocarboxylic acid eg, 3-chloropropionic acid, 2-methyl-3-clopropionic acid, 2,2-dimethyl-3-clopropionic acid, 3-bromopropionic acid, 2-bromopropionic acid Methyl-3-bromopropionic acid, 2,2-dimethyl-3-bromopropionic acid, 3-propionic acid, 2-methyl-3-propionic acid, 2,2-dimethyl-3-propionic acid, etc.
- alcohol for example, methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, etc.
- “lower” means that the substituent or compound following this term has 1 to 4 carbon atoms).
- the substituents R i and R 2 in the above general formula are each independently a hydrogen atom or a linear or branched lower alkyl group, specifically, for example, a methyl group, an ethyl group, an n-propyl group, an isopropyl group , ⁇ -butyl group, isobutyl group, etc.
- the substituent R 3 is a linear or branched lower alkyl group, specifically, for example, a methyl group, an ethyl group, an ⁇ -propyl group, an isopropyl group, an ⁇ -
- a substituent X represents a halogen atom, specifically, for example, a chlorine atom, a bromine atom, an iodine atom, or a fluorine atom.
- 3-octogenocarboxylic acid ester examples include methyl 3-propene methyl propionate, Methyl ethyl propionate, ⁇ -propyl 3-chloropropionate, isopropyl 3-chloropropionate, ⁇ -petitisolate 3-chloropropionate, 3-isobutyl propionate, 2-methyl-3-chlorobutyrate Methyl, 2-methyl-1-ethyl ethyl propionate, 2-methyl-3-ethyl chloropropionate ⁇ -propyl, 2-methyl-3-cyclopropyl propionate, 2, 2, 2-dimethyl-3-propionic acid Methyl, 2,2-dimethyl-3-ethyl ethyl propionate, 2,2-dimethyl-3-ethyl ⁇ -propyl propionate, 2,2-dimethyl monoethyl
- the particulate metal sodium used in the above reaction one prepared as described above can be used.
- the amount of the metal sodium used is as follows, based on 1 mol of the / 3-halogenocarboxylic acid ester represented by the above general formula. The range is from 1.9 to 2.5 moles, preferably from 2.0 to 2.1 moles. It is preferable that no metal sodium remains at the end of the reaction from the viewpoint of preventing decomposition of the product and safety during post-treatment.
- the amount of chlorotrimethylsilane C 1 S i (CH 3 ) 3 used in the reaction is 0.8 to 1 with respect to 1 mol of the / 3-halogenocarboxylic acid ester represented by the above general formula. 1 mole, preferably in the range of 0.9 to 1.0 mole.
- the hydrocarbon-based solvent used in preparing the above-mentioned particulate metal sodium can be used as it is, and the amount of use is represented by the above general formula; 3-halogeno The range is 200 to 3000 m1, preferably 300 to 1000 m1, per mole of the carboxylic acid ester.
- the amount of the hydrocarbon solvent used in the preparation of the particulate metal sodium is more or less than the range suitable for the amount of the solvent used in this reaction, the amount of the hydrocarbon solvent in the reaction system falls within this range.
- the amount may be adjusted so as to be the amount.
- the reaction temperature in this reaction is 15 to 50 ° (: preferably 10 to 40).
- the pressure at the time of the reaction is not particularly limited, but the reaction is usually carried out at normal pressure, and the target substance, 1-alkoxy-1-trimethylsilyloxycyclopropane, is filtered or distilled after the reaction is completed.
- the target substance 1-alkoxy-1-trimethylsilyloxycyclopropane
- rectification enables isolation with high purity.
- the use of the finely divided metal sodium as described above allows the reaction to proceed sufficiently with only the hydrocarbon-based solvent, which characterizes the method of the present invention.
- the yield may be improved by adding an ether compound.
- ether compound used for this purpose examples include getyl ether, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, and tetrahydrofuran. Of these, tetrahydrofuran is preferable.
- the amount of the ether compound used does not need to be large as in the case where it is used as a reaction solvent in a conventional method, and is 5 to 50% by volume, preferably 10 to 10%, based on the hydrocarbon solvent. A small amount of ⁇ 30% is good.
- the mixture was stirred at a high speed of 7,500 to 8,000 rpm for 10 minutes using a homomixer to pulverize the sodium metal. Thereafter, the heating was stopped and the mixture was allowed to stand until the liquid temperature returned to room temperature, thereby obtaining a toluene dispersion of particulate metal sodium having an average particle diameter of 40 im.
- the metallic sodium dispersed in toluene was transferred to a 500 ml reaction flask using a Teflon tube. After transfer, allow to stand for a while, allow the metallic sodium to settle, and use a Teflon tube to remove the supernatant. 170 ml of toluene was extracted. Then, the reaction flask was cooled with water, and 21.7 g (0.2 mol) of trimethylchlorosilane was added dropwise at 15 to 17 while stirring under a nitrogen stream.
- the raw material was used; it refers to 3-octylogenocarboxylic acid ester.
- Example 1 was prepared using 28 Oml of toluene (242 g), 14.57 g (0.633 mol) of a piece of sodium metal and 7.5 mg of oleic acid (0.05% by weight with respect to the sodium metal). By performing the same operation as described above, a dispersion liquid of metal sodium in the form of fine particles (average particle diameter: 45 / m) was obtained. Further, in the same manner as in Example 1, the obtained dispersion of metallic sodium was transferred to a 50-Om 1 reaction flask, allowed to stand, and then 10 Om 1 of the supernatant toluene was extracted.
- Example 2 Using a solution of 32.6 g (0.3mo 1) of trimethylchlorosilane and 45.2 g (0.3mo 1) of isopropyl 3-propionate in 45 ml of toluene, the same procedure as in Example 1 was carried out. The reaction was operated. The obtained reaction mixture was analyzed by gas chromatography. As a result, 10.8% of 1-isopropoxy-1-trimethylsilyloxycyclopropane was produced in a total area ratio, and 3% of isopropyl propionate as a raw material was 3%. 0% remained.
- Example 2 The same operation as in Example 1 was carried out using 73 g (0.423 mol 1) and 5.9 mg of oleic acid (0.06% by weight based on metallic sodium) to obtain fine particles (average particle diameter). A dispersion of metallic sodium of 3 rn) was obtained. Further, in the same manner as in Example 1, the obtained dispersion of metallic sodium was transferred to a 500-ml reaction flask, allowed to stand, 105 ml of n-octane in the supernatant was extracted, and the amount of the solvent was reduced.
- a reflux cooling tube and a thermocouple thermometer were attached to a homomixer equipped with a 500-ml four-necked flask with a bottom valve. .69 g (0.42 lmo 1) And 4.9 mg of aluminum stearate (0.05% by weight based on metallic sodium) were added, and the temperature was increased by heating all over a mantle tube while blowing nitrogen from the bottom valve little by little. After the liquid temperature reached 100 to 105 and the metallic sodium was melted, the mixture was stirred at a high speed of 7500 to 8000 rpm for 10 minutes using a homomixer to pulverize the metallic sodium. Thereafter, the heating was stopped and the mixture was allowed to stand until the liquid temperature returned to room temperature, thereby obtaining a toluene dispersion of fine metal sodium having an average particle diameter of 40.
- Example 2 As in Example 1, using 280 ml (242 g) of toluene, 14.5 g (0.63 mol) of metallic sodium pieces and 7.3 mg of aluminum stearate (0.05% by weight based on metallic sodium). By performing the above operations, metallic sodium in the form of fine particles (average particle size: 30 im) was obtained. Next, the sodium metal was settled, the supernatant toluene was extracted, and the amount of toluene was adjusted to 100 ml. 30 ml of lahydrofuran and 32.6 g (0.3 mol) of trimethylchlorosilane were added dropwise, and a solution of 41.0 g (0.3 mol) of ethyl 3-propionate in 5 Oml of toluene was used. The reaction was performed in the same manner as in Example 1.
- Example 2 Using 300 ml (260 g) of toluene, 4.86 g (0.21 lmo 1) of metal sodium pieces and 2.4 mg of aluminum stearate, the same operation as in Example 1 was carried out to obtain fine particles. Metal sodium with an average particle size of 30 m) was obtained. Then, the metal sodium was settled, the supernatant toluene was extracted, and the amount of toluene was adjusted to 5 Om1. Then, 15 ml of tetrahydrofuran and 10.9 g (0.1mo1) of trimethylchlorosilane were added dropwise, and then the mixture was added to a 3-neck. A solution prepared by dissolving 13.7 g (0.1mo1) of ethyl propionate in 15 ml of toluene was added dropwise to carry out the reaction.
- the reaction was carried out in the same manner as in Example 4 except that 24.5 g (0.2 mol) of methyl 3-propene was used instead of 24.6 g (0.18 mol) of ethyl 3-propionate. went. After the completion of the reaction, the reaction mixture was analyzed, and the yield of 1-methoxy-1-trimethylsilyxyxycyclopropane was 77.8% by gas chromatography (total area ratio). Then, the reaction solution was suction-filtered under a nitrogen atmosphere, and the obtained filtrate was rectified under reduced pressure to obtain 23.4 g of 1-methoxy-11-trimethylsilyloxycyclopropane (boiling point: 40 to 42 ° C). C / 28 mmHg) (yield 73.0%).
- the reaction was carried out in the same manner as in Example 4 except that 30.1 g of isopropyl propionate (0.2mo 1) was used instead of 24.6 g (0.18mo 1) of ethyl 3-ethyl propionate. went. After the completion of the reaction, the reaction mixture was analyzed. As a result, the production rate of 1-isopropoxy-11-trimethylsilyloxycyclopropane was 79.1% by gas chromatography (total area ratio). Subsequently, the reaction solution was subjected to suction filtration under a nitrogen atmosphere, and the obtained filtrate was rectified under reduced pressure to obtain 26.g of 1-isopropoxy-11-trimethylsilyloxycyclopropane (boiling point: 62
- the reaction was carried out using sandy metallic sodium produced in the reaction flask and replacing the reaction solvent with ether. That is, in a 300 ml 1 flask equipped with a stirrer, thermometer and reflux condenser, 4.83 g (0.2 lmo 1) of metallic sodium and 100 ml of toluene were charged, and 98-100 t under a nitrogen stream. After stirring vigorously at 900 to 1000 rpm for 5 minutes, leave still, Was allowed to cool to room temperature to obtain sandy metallic sodium. Then, using a Teflon tube, the supernatant toluene was extracted while pumping with nitrogen.
- reaction mixture was then heated to 25 with stirring, and ethyl 3-ethyl propionate was added.
- the method of the present invention does not use an ether compound, which is problematic in terms of safety in factory production, as a solvent as in the conventional method, and is a fine particle dispersed in a hydrocarbon solvent that is industrially easy to use.
- metallic sodium we succeeded in producing 1-alkoxy-1-trimethylsilicyl oxycyclopropane with a yield equal to or higher than that obtained when an ether-based solvent was used. It is not necessary to use special equipment like this, it is advantageous in terms of production cost, and it is simple and convenient without the complicated operation of solvent exchange. Propanes can be produced, and by the provision of the method of the present invention, 1-alkoxy-1-trimethylsi Industrial production of riloxycyclopropane has become possible.
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Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP97949164A EP0900803B1 (en) | 1996-12-20 | 1997-12-19 | Process for the preparation of 1-alkoxy-1-trimethylsilyloxycyclopropanes |
| DE69720208T DE69720208T2 (de) | 1996-12-20 | 1997-12-19 | Verfahren zur herstellung von 1-alkoxy-1-trimethylsilyloxy-cyclopropanen |
| US09/117,390 US5994572A (en) | 1996-12-20 | 1997-12-19 | Process for production of 1-alkoxy-1-trimethylsilyloxy cyclopropanes |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8/354851 | 1996-12-20 | ||
| JP35485196A JP3760254B2 (ja) | 1996-12-20 | 1996-12-20 | 1−アルコキシ−1−トリメチルシリロキシシクロプロパン類の製造法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998028309A1 true WO1998028309A1 (fr) | 1998-07-02 |
Family
ID=18440344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1997/004705 Ceased WO1998028309A1 (fr) | 1996-12-20 | 1997-12-19 | Procede d'elaboration de 1-alkoxy-1-trimethylsilyloxycyclopropanes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5994572A (ja) |
| EP (1) | EP0900803B1 (ja) |
| JP (1) | JP3760254B2 (ja) |
| DE (1) | DE69720208T2 (ja) |
| WO (1) | WO1998028309A1 (ja) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63313792A (ja) * | 1987-03-13 | 1988-12-21 | ローヌ―プラン シミ | シリル化ケテンアセタールの製造方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2046091B1 (es) * | 1991-09-24 | 1994-09-01 | Elmuquimica Farm Sl | Nuevo procedimiento de obtencion del acido 1-ciclopropil-6-fluoro-1,4-dihidro-4-oxo-7-(1-piperacinil)-3-quinolin carboxilico. |
| US5412134A (en) * | 1992-05-26 | 1995-05-02 | E. R. Squibb & Sons, Inc. | Process for preparing diprotected 2,3-hydroxymethyl cyclobutanol |
-
1996
- 1996-12-20 JP JP35485196A patent/JP3760254B2/ja not_active Expired - Fee Related
-
1997
- 1997-12-19 EP EP97949164A patent/EP0900803B1/en not_active Expired - Lifetime
- 1997-12-19 DE DE69720208T patent/DE69720208T2/de not_active Expired - Fee Related
- 1997-12-19 US US09/117,390 patent/US5994572A/en not_active Expired - Lifetime
- 1997-12-19 WO PCT/JP1997/004705 patent/WO1998028309A1/ja not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63313792A (ja) * | 1987-03-13 | 1988-12-21 | ローヌ―プラン シミ | シリル化ケテンアセタールの製造方法 |
Non-Patent Citations (2)
| Title |
|---|
| ORG. SYNTHESIS, 1984, Vol. 63, SALAUN J., MARGUERITE J., pages 147-153. * |
| See also references of EP0900803A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0900803A1 (en) | 1999-03-10 |
| EP0900803A4 (en) | 1999-11-03 |
| EP0900803B1 (en) | 2003-03-26 |
| DE69720208T2 (de) | 2003-12-11 |
| JP3760254B2 (ja) | 2006-03-29 |
| US5994572A (en) | 1999-11-30 |
| JPH10182665A (ja) | 1998-07-07 |
| DE69720208D1 (de) | 2003-04-30 |
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