DK167062B1 - Fremgangsmaade til fremstilling af 1,4-bis(2,2,2-trifluorethoxy)benzen - Google Patents
Fremgangsmaade til fremstilling af 1,4-bis(2,2,2-trifluorethoxy)benzen Download PDFInfo
- Publication number
- DK167062B1 DK167062B1 DK112180A DK112180A DK167062B1 DK 167062 B1 DK167062 B1 DK 167062B1 DK 112180 A DK112180 A DK 112180A DK 112180 A DK112180 A DK 112180A DK 167062 B1 DK167062 B1 DK 167062B1
- Authority
- DK
- Denmark
- Prior art keywords
- bis
- formula
- give
- benzene
- trifluoroethoxy
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D211/08—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms
- C07D211/18—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D211/26—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hydrocarbon or substituted hydrocarbon radicals directly attached to ring carbon atoms with substituted hydrocarbon radicals attached to ring carbon atoms with hydrocarbon radicals, substituted by nitrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C43/00—Ethers; Compounds having groups, groups or groups
- C07C43/02—Ethers
- C07C43/20—Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring
- C07C43/225—Ethers having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring containing halogen
-
- 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
- C07C45/45—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by condensation
- C07C45/46—Friedel-Crafts reactions
-
- 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
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/76—Ketones containing a keto group bound to a six-membered aromatic ring
- C07C49/84—Ketones containing a keto group bound to a six-membered aromatic ring containing ether groups, groups, groups, or groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C65/00—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C65/21—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing ether groups, groups, groups, or groups
Description
i DK 167062 B1
Den foreliggende opfindelse angår en særlig fremgangsmåde til fremstilling af forbindelsen 1,4-bis(2,2,2-trifluor-ethoxy)benzen.
5 Det er fra GB patentskrift nr. 1 143 481 og US patentskrift nr. 3 719 687 kendt at fremstille lignende forbindelser under anvendelse af fluorholdige sulfonater. Det har nu overraskende vist sig, at l,4-bis(2,2,2-trifluor-ethoxy)benzen kan fremstilles i bedre udbytte ved fremit) gangsmåden ifølge opfindelsen, ved hvilken man omsætter 1.4- dibrombenzen med et alkyleringsmiddel med formlen CF^CHUjO-A, hvor A er et alkalimetal, i nærværelse af cupro- eller cupriioner i et stærkt polært opløsningsmiddel.
15 1.4- Bis(2,2,2-trifluorethoxy)benzen, der er kendt fra US patent nr. 4 071 524, er velegnet til brug ved fremstilling af det kendte antiarrhytmiske middel 2,5-bis(2,2,2-trifluorethoxy)-N-(2-piperidylmethyl)benzamid (flecainid) 20 og salte deraf ud fra brom- eller hydroxylsubstituerede benzener.
Den antiarrhytmiske forbindelse, flecainid, dens salte og en fremgangsmåde til fremstilling deraf er beskrevet i US 25 patentskrift nr. 3 900 481. Den har følgende formel CF3CH2°^gj-C-N-CH2—CnJ VI11 'SVxoch2cf3
Flecainid kan også fremstilles som beskrevet i det føl-35 gende ud fra 1,4-dibrombenzen. En sådan fremgangsmåde er at foretrække frem for den kendte fremgangsmåde på grund af forskellige praktiske fordele, f.eks. de relativt lave DK 167062 B1 2 omkostninger for udgangsmaterialerne, den lette udøvelse af de deri indgående enhedsoperationer og de forholdsvis høje udbytter af det ønskede produkt.
5
Denne fremgangsmåde omfatter følgende trin, hvor første trin er fremgangsmåden ifølge opfindelsen.
(1) Omsætning af en forbindelse med formlen 10
Br
X
Br 15 med et hensigtsmæssigt alkyleringsmiddel med formlen cf3ch2o-a 20 hvori A er et alkalimetal til opnåelse af forbindelsen med formlen
25 CFCHO
X
OCH2CF3 30 (2) acetylering i nærværelse af en Lewis-syrekataly sator til opnåelse af en substitueret acetophe-non med formlen 0
II
35 CF3CH2°x^/CCH3 {XT 111 OCHjCF, DK 167062 B1 3 (3) enten (a) chlorering af den substituerede acetophenon til dannelse af den tilsvarende α,α-dichlor- 5 acetophenon med formlen 9 ' iv CF-CH 0 CCHC1 3 2 C12 XOCH2CF3 (b) tilsætning af en pufrende base og yderligere chlorering til opnåelse af den tilsvarende 15 o,a,o,-trichloracetophenon med formlen 0
t V
CF,CH,0 CCC1,
X
xoch2cf3 eller 25 (c) omsætning af den substituerede acetophenon med hypochlorit til dannelse af den tilsvarende benzoesyre med formlen 0
30 CF CH O JL
3 2 VI
X
xoch2cf3 og 35 DK 167062 B1 4 (d) omsætning af syren med et uorganiske syre-chlorid til opnåelse af syrechloridet med formlen 0
5 II
CF3CH2°X-/CC1 VII
vOCH2CF3 og derpå 10 (4) omsætning af produktet fra trin 3(b) eller trin 3(d) enten med 2-(aminomethyl)piperidin 15 til dannelse af det ønskede produkt i ét trin eller med 2-(aminomethyl)pyridin 20 efterfulgt af reduktion til dannelse af det tønskede produkt, som fri base eller eventuelt i form af acetatsaltet deraf.
25 30 35 DK 167062 B1 5
Totalprocessen følger reaktionsskemaet:
O
I! 5 Br OCH CF0 CF-CHLO ^CCH_ (¾ — ro) -- Yof '—, (i) (2)
Br I II OCH2CF3 111 OCH2CF3 10 (3)(a) 0 V ° (3) (c) |1 li CFoCH_0 CCC10 CF,CH O CCHCl- .. ’ ^ ^ ^ v 'NsOCH2CF3 iv X'och2cf3 (4) 20 o o il i!
— CF.,CKL O CC1 CF,CrL,0 COH
Λ§( -J
25 vil xoch2cf3 VI xoch2cf3 l-f VIII -?* 30 35 DK 167062 Bl 6 1,4-Dibrombenzen I omsættes hensigtsmæssigt med 2,2,2-trifluorethoxidionen i en stærk polær opløsningsmiddel-blanding ved en temperatur på op til tilbagesvalingstemperaturen for opløsningen i nærværelse af cupro- eller 5 cupriioner til opnåelse af det ønskede produkt II i godt udbytte. 2,2,2-trifluorethoxid opnås fra den tilsvarende alkohol ved omsætning med en stærk base, såsom natriumhydroxid eller foretrukkent natriumhydrid. Egnede opløsningsmiddelblandinger omfatter dimethylsulfoxid, N,N-di-10 methylacetamid og foretrukkent Ν,Ν-dimethylformamid, hver med ca. 10 til 50%, og foretrukkent ca. 20%, 2,2,2-tri-fluorethanol. Cuproionen tilvejebringes f.eks. ved hjælp af et cuprohalogenid, såsom cuproiodid eller cuprobromid. Cupriionen tilvejebringes f.eks. med cupribromid, cupri-15 sulfat eller cupriacetat.
Det efterfølgende eksempel forklarer fremgangsmåden iføl ge opfindelsen nærmere.
20 EKSEMPEL 1 A = Na
Til 0,20 mol (9,6 g) 50%'s natriumhydrid i 40 ml N,N-di-25 methylformamid sættes 40 ml 2,2,2-trifluorethanol efterfulgt af 0,034 mol (8,0 g) 1,4-dibrombenzen og 0,006 mol (1,0 g) cuproiodid. Blandingen opvarmes ved tilbagesvalingstemperaturen i 4 timer, afkøles derpå til ca. 25 °C og filtreres. Resten vaskes med Ν,Ν-dimethylformamid. Op-30 løsningen udhældes derpå i vand, og bundfaldet fraskilles ved filtrering. Produktet opløses i diethylether og filtreres, og filtratopløsningen inddampes til opnåelse af en fast rest, som vaskes med hexan og tørres. Produktet er 7,3 g (80%) 1,4-bis(2,2,2-trifluorethoxy)benzen, smp.
35 77 til 79 °C.
DK 167062 B1 7
Omsætningen gentages derpå som følger, idet man varierer betingelser og forhold mellem bestanddelene og anvender cupribromid som katalysator: til en blanding af 4,8 g na-triumhydrid i 40 ml N,N-dimethylformamid sættes 20 ml 5 (27,4 g) 2,2,2-trifluorethanol. Til denne blanding sættes 0,034 mol (8,0 g) 1,4-dibrombenzen og 1,0 g cupribromid. Reaktionsblandingen opvarmes ved ca. 100 °C i to timer, hvorpå der afskrækkes med isvand. Syrning med saltsyre og filtrering giver 9,2 g (99%) hvidt fast stof 1,4-10 bis(2,2,2-trifluorethoxy)benzen. Strukturen bekræftes ved iR-spektralanalyse.
Følgende eksempel belyser den nyttige virkning af fremgangsmåden ifølge opfindelsen i sammenligning med en 15 kendt proces, idet fremgangsmåden ifølge opfindelsen kan give et bedre udbytte.
EKSEMPEL 2 20 Til en blanding af 2,42 mol (334,4 g) kaliumcarbonat, 2,2 mol (510,6 g) 2,2,2-trifluorethyltrifluormethansulfonat i 1,02 liter acetone sættes en opløsning af 1,0 mol (110 g) hydroguinon i 1,1 liter acetone langsomt i løbet af 2 timer. Derpå opvarmes ved tilbagesvaling i 24 timer, reak-25 tionsblandingen inddampes, og der sættes til resten 2 liter chloroform og 2 liter vand. Chloroformlaget fraskilles, det vandige lag vaskes to gange med 1 liter chloroform, og den kombinerede chloroformopløsning vaskes med 1 liter vand. Chloroformopløsningen tørres over magnesium-30 sulfat og koncentreres derpå under vakuum. Der sættes hexan til resten, og det faste produkt samles ved filtrering og vaskes med hexan. Yderligere materiale opnås fra de koncentrerede rester. Der opnås et udbytte på 88%, 241 g 1,4-bis(2,2,2-trifluorethoxy)benzen, smp. 75-77 °C.
35
Claims (1)
- DK 167062 B1 8 Patentkrav : Fremgangsmåde til fremstilling af forbindelsen 1,4-bis-5 (2,2,2-trifluorethoxy)benzen med formlen CF^CH_0 X 10 och2cf3 11 kendetegnet ved, at man omsætter 1,4-dibrom-15 benzen med formlen 20 med et alkyleringsmiddel med formlen cf3ch2o-a 25 hvor A et alkalimetal, i nærværelse af cupro- eller cu-priioner i et stærkt polært opløsningsmiddel. 30 35
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2133179A | 1979-03-19 | 1979-03-19 | |
US2133279A | 1979-03-19 | 1979-03-19 | |
US2133179 | 1979-03-19 | ||
US2133279 | 1979-03-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
DK112180A DK112180A (da) | 1980-09-20 |
DK167062B1 true DK167062B1 (da) | 1993-08-23 |
Family
ID=26694559
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK112180A DK167062B1 (da) | 1979-03-19 | 1980-03-14 | Fremgangsmaade til fremstilling af 1,4-bis(2,2,2-trifluorethoxy)benzen |
DK122290A DK164857C (da) | 1979-03-19 | 1990-05-17 | Fremgangsmaade til fremstilling af 2,5-bis(2,2,2-trifluorethoxy)-n-(2-piperidylmethyl)benzamid |
DK91798A DK79891D0 (da) | 1979-03-19 | 1991-04-30 | 2,5-bis(2,2,2-trifluorethoxy)acetophenoner til brug som mellemprodukter og fremgangsmaade til fremstilling deraf |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK122290A DK164857C (da) | 1979-03-19 | 1990-05-17 | Fremgangsmaade til fremstilling af 2,5-bis(2,2,2-trifluorethoxy)-n-(2-piperidylmethyl)benzamid |
DK91798A DK79891D0 (da) | 1979-03-19 | 1991-04-30 | 2,5-bis(2,2,2-trifluorethoxy)acetophenoner til brug som mellemprodukter og fremgangsmaade til fremstilling deraf |
Country Status (14)
Country | Link |
---|---|
JP (8) | JPH01125342A (da) |
CA (1) | CA1137486A (da) |
CH (1) | CH643829A5 (da) |
DE (1) | DE3010195A1 (da) |
DK (3) | DK167062B1 (da) |
ES (1) | ES8104227A1 (da) |
FR (7) | FR2454438A1 (da) |
GB (2) | GB2045760B (da) |
IE (1) | IE49558B1 (da) |
IL (1) | IL59623A (da) |
IT (1) | IT1195262B (da) |
NL (1) | NL191486C (da) |
PT (1) | PT70967A (da) |
SE (5) | SE447992B (da) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2519975A1 (fr) * | 1982-01-21 | 1983-07-22 | Rhone Poulenc Spec Chim | Procede de preparation de trifluoromethoxy ou trifluoromethylthiophenylcetones |
FR2519979A1 (fr) * | 1982-01-21 | 1983-07-22 | Rhone Poulenc Spec Chim | Procede de preparation de trifluoromethoxy ou trifluoromethylthiophenylsulfones |
FR2519974A1 (fr) * | 1982-01-21 | 1983-07-22 | Rhone Poulenc Spec Chim | Procede d'acylation d'halogeno ou trihalogenomethylbenzenes |
FR2519980A1 (fr) * | 1982-01-21 | 1983-07-22 | Rhone Poulenc Spec Chim | Procede de sulfonylation d'halogeno ou trihalogenomethylbenzenes |
FR2525588A1 (fr) * | 1982-04-22 | 1983-10-28 | Rhone Poulenc Spec Chim | Procede de preparation de phenylcetones a partir d'halogeno ou trihalogenomethylbenzenes et de composes aliphatiques ou aromatiques trihalogenomethyles |
EP0175188A1 (de) * | 1984-09-11 | 1986-03-26 | Nihon Tokushu Noyaku Seizo K.K. | Carbamoylimidazol-Derivate |
US4675448A (en) * | 1985-02-13 | 1987-06-23 | Ethyl Corporation | Chlorination process |
FR2579594B1 (fr) * | 1985-03-29 | 1987-06-05 | Rhone Poulenc Spec Chim | Procede de preparation de trifluoroethoxy ou trifluoroethylthiobenzenes |
FR2579591B1 (fr) * | 1985-03-29 | 1988-10-14 | Rhone Poulenc Spec Chim | Procede de preparation de derives pentafluoroethoxy et pentafluoroethylthiobenzeniques |
NZ219913A (en) * | 1986-04-25 | 1990-08-28 | Riker Laboratories Inc | Various flecainide derivatives and antibodies raised thereto |
DE3786037T2 (de) * | 1986-04-25 | 1993-11-25 | Abbott Lab | Tracer zur Benutzung in immunologischen Fluoreszenz-Polarisationsverfahren zum Nachweis von Flecainid. |
DE3644798A1 (de) * | 1986-12-31 | 1988-07-14 | Hoechst Ag | Neue nitrohaloalkoxybenzole, verfahren zu ihrer herstellung und ihre verwendung |
FR2640262B1 (fr) * | 1988-12-14 | 1991-05-31 | Rhone Poulenc Chimie | Procede de preparation de cetones aryliques trifluoroethoxylees |
IL120715A (en) | 1997-04-21 | 2000-07-16 | Finetech Ltd | Process for the preparation of (2,2,2,-trifluoroethoxy)benzoic acids |
US6316627B1 (en) * | 1997-04-21 | 2001-11-13 | Fine Tech Ltd. | Process for the preparation of flecainide |
IL121288A (en) | 1997-07-11 | 2000-10-31 | Finetech Ltd | Process and a novel intermediate for the preparation of flecainide |
US7196197B2 (en) | 2003-09-17 | 2007-03-27 | Apotex Pharmachem Inc. | Process for the preparation of Flecainide, its pharmaceutically acceptable salts and important intermediates thereof |
JP4894226B2 (ja) * | 2005-10-31 | 2012-03-14 | Dic株式会社 | ハイドロキノン骨格を有する含フッ素液晶化合物の製造方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3539642A (en) * | 1967-07-19 | 1970-11-10 | Geigy Chem Corp | 2-phenyl-2-(1-naphthyl)acetamides |
US3772304A (en) * | 1969-10-30 | 1973-11-13 | Hoffmann La Roche | 4-hydroxy-isoquinolines and processes for their preparation |
US3655728A (en) | 1970-07-22 | 1972-04-11 | Riker Laboratories Inc | N-(2 - dialkylaminoalkylene)-esters of fluoroalkoxy-substituted aryl carboxylic acid and salts thereof |
US3719687A (en) * | 1970-07-22 | 1973-03-06 | Riker Laboratories Inc | N-(2-dialkylaminoalkylene)amides of 1,1-dihydroperfluoroalkoxy-substituted aryl acids and salts thereof |
US3967949A (en) * | 1973-06-18 | 1976-07-06 | Eli Lilly And Company | Fluoroalkoxyphenyl-substituted nitrogen heterocycles as plant stunting agents |
US4169108A (en) * | 1973-08-16 | 1979-09-25 | Sterling Drug Inc. | 5(OR 6)-[(Substituted-amino)alkyl]-2,3-naphthalenediols |
US4013670A (en) * | 1974-04-01 | 1977-03-22 | Riker Laboratories, Inc. | Derivatives of pyrrolidine and piperidine |
US4005209A (en) * | 1974-04-01 | 1977-01-25 | Riker Laboratories, Inc. | Antiarrhythmic method utilizing fluoroalkoxy-N-piperidyl and pyridyl benzamides |
US3900481A (en) | 1974-04-01 | 1975-08-19 | Riker Laboratories Inc | Derivatives of pyrrolidine and piperidine |
IL49803A (en) * | 1975-06-28 | 1979-11-30 | Fisons Ltd | Preparation of pyrogallol |
DE2616478C2 (de) * | 1976-04-14 | 1986-05-22 | Brickl, Rolf, Dr., 7951 Warthausen | Fluoracylresorcine enthaltende Arzneimittel, Biocide und Kosmetika |
JPS6023656B2 (ja) * | 1976-09-02 | 1985-06-08 | 川研フアインケミカル株式会社 | アルコキシ芳香族化合物の製造方法 |
US4071524A (en) * | 1976-11-08 | 1978-01-31 | Riker Laboratories, Inc. | Derivatives of urea |
US4097481A (en) * | 1976-11-08 | 1978-06-27 | Riker Laboratories, Inc. | Tertiary amide derivatives of pyrrolidine and piperidine |
-
0
- GB GB8214964A patent/GB2097000B/en not_active Expired
-
1980
- 1980-03-04 CA CA000346919A patent/CA1137486A/en not_active Expired
- 1980-03-14 SE SE8002003A patent/SE447992B/sv not_active IP Right Cessation
- 1980-03-14 IL IL59623A patent/IL59623A/xx unknown
- 1980-03-14 DK DK112180A patent/DK167062B1/da not_active IP Right Cessation
- 1980-03-16 NL NL8001551A patent/NL191486C/xx not_active IP Right Cessation
- 1980-03-17 DE DE19803010195 patent/DE3010195A1/de active Granted
- 1980-03-17 ES ES489629A patent/ES8104227A1/es not_active Expired
- 1980-03-18 IE IE549/80A patent/IE49558B1/en not_active IP Right Cessation
- 1980-03-18 FR FR8006019A patent/FR2454438A1/fr active Granted
- 1980-03-18 PT PT70967A patent/PT70967A/pt active IP Right Revival
- 1980-03-18 IT IT20746/80A patent/IT1195262B/it active Protection Beyond IP Right Term
- 1980-03-18 GB GB8009041A patent/GB2045760B/en not_active Expired
- 1980-03-18 CH CH212880A patent/CH643829A5/de not_active IP Right Cessation
-
1981
- 1981-01-07 FR FR8100141A patent/FR2468570A1/fr active Granted
- 1981-01-07 FR FR8100140A patent/FR2468569A1/fr active Granted
- 1981-01-07 FR FR8100142A patent/FR2468571A1/fr active Granted
- 1981-01-07 FR FR8100143A patent/FR2468576A1/fr active Granted
- 1981-01-07 FR FR8100144A patent/FR2468590A1/fr active Granted
- 1981-01-07 FR FR8100145A patent/FR2468591A1/fr active Granted
-
1984
- 1984-03-21 SE SE8401555A patent/SE463260B/sv not_active IP Right Cessation
- 1984-03-21 SE SE8401554A patent/SE447993B/sv not_active IP Right Cessation
-
1988
- 1988-06-01 JP JP63135368A patent/JPH01125342A/ja active Granted
- 1988-06-01 JP JP63135366A patent/JPH01125339A/ja active Granted
- 1988-06-01 JP JP63135363A patent/JPH01104045A/ja active Granted
- 1988-06-01 JP JP63135364A patent/JPH01104043A/ja active Granted
- 1988-06-01 JP JP63135367A patent/JPH01125341A/ja active Granted
- 1988-06-01 JP JP63135365A patent/JPH01104044A/ja active Granted
- 1988-06-01 JP JP63135369A patent/JPH01125343A/ja active Granted
- 1988-06-01 JP JP63135370A patent/JPH01125344A/ja active Granted
-
1989
- 1989-04-27 SE SE8901533A patent/SE463419B/sv not_active IP Right Cessation
- 1989-04-27 SE SE8901532A patent/SE463418B/sv not_active IP Right Cessation
-
1990
- 1990-05-17 DK DK122290A patent/DK164857C/da not_active IP Right Cessation
-
1991
- 1991-04-30 DK DK91798A patent/DK79891D0/da unknown
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