CH618695A5 - Process for the preparation of chromane derivatives - Google Patents
Process for the preparation of chromane derivatives Download PDFInfo
- Publication number
- CH618695A5 CH618695A5 CH32576A CH32576A CH618695A5 CH 618695 A5 CH618695 A5 CH 618695A5 CH 32576 A CH32576 A CH 32576A CH 32576 A CH32576 A CH 32576A CH 618695 A5 CH618695 A5 CH 618695A5
- Authority
- CH
- Switzerland
- Prior art keywords
- general formula
- compound
- group
- ether
- mgx
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 17
- 238000002360 preparation method Methods 0.000 title claims description 4
- 125000003016 chromanyl group Chemical class O1C(CCC2=CC=CC=C12)* 0.000 title 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 35
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 26
- 150000001875 compounds Chemical class 0.000 claims description 19
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 15
- 125000001033 ether group Chemical group 0.000 claims description 9
- VZWXIQHBIQLMPN-UHFFFAOYSA-N chromane Chemical class C1=CC=C2CCCOC2=C1 VZWXIQHBIQLMPN-UHFFFAOYSA-N 0.000 claims description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 5
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 150000001340 alkali metals Chemical class 0.000 claims description 4
- 125000005843 halogen group Chemical group 0.000 claims description 4
- 238000007327 hydrogenolysis reaction Methods 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 2
- VITCXWNGUMTQRJ-UHFFFAOYSA-L [Li+].[Li+].[Cl-].[Cl-].Cl.Cl Chemical compound [Li+].[Li+].[Cl-].[Cl-].Cl.Cl VITCXWNGUMTQRJ-UHFFFAOYSA-L 0.000 claims description 2
- KPZGRMZPZLOPBS-UHFFFAOYSA-N 1,3-dichloro-2,2-bis(chloromethyl)propane Chemical compound ClCC(CCl)(CCl)CCl KPZGRMZPZLOPBS-UHFFFAOYSA-N 0.000 claims 1
- OVSKIKFHRZPJSS-UHFFFAOYSA-N 2,4-D Chemical compound OC(=O)COC1=CC=C(Cl)C=C1Cl OVSKIKFHRZPJSS-UHFFFAOYSA-N 0.000 claims 1
- 239000007859 condensation product Substances 0.000 claims 1
- 239000003984 copper intrauterine device Substances 0.000 claims 1
- -1 tetrahydropyranyloxy radical Chemical class 0.000 description 32
- GVJHHUAWPYXKBD-IEOSBIPESA-N α-tocopherol Chemical compound OC1=C(C)C(C)=C2O[C@@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-IEOSBIPESA-N 0.000 description 15
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 10
- 238000009833 condensation Methods 0.000 description 10
- 230000005494 condensation Effects 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- YYROPELSRYBVMQ-UHFFFAOYSA-N 4-toluenesulfonyl chloride Chemical compound CC1=CC=C(S(Cl)(=O)=O)C=C1 YYROPELSRYBVMQ-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- MHDVGSVTJDSBDK-UHFFFAOYSA-N dibenzyl ether Chemical compound C=1C=CC=CC=1COCC1=CC=CC=C1 MHDVGSVTJDSBDK-UHFFFAOYSA-N 0.000 description 6
- 239000012259 ether extract Substances 0.000 description 6
- 125000000217 alkyl group Chemical group 0.000 description 5
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- FEZFOZDYAFUPAO-QFIPXVFZSA-N 2-[(2s)-2,5,7,8-tetramethyl-6-phenylmethoxy-3,4-dihydrochromen-2-yl]ethanol Chemical compound C([C@@](C)(CCO)OC=1C(C)=C2C)CC=1C(C)=C2OCC1=CC=CC=C1 FEZFOZDYAFUPAO-QFIPXVFZSA-N 0.000 description 3
- BSMNACFYVTXJHN-NSHDSACASA-N 4-[(2S)-heptan-2-yl]benzenesulfonic acid Chemical compound CCCCC[C@H](C)C1=CC=C(C=C1)S(=O)(=O)O BSMNACFYVTXJHN-NSHDSACASA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 125000005278 alkyl sulfonyloxy group Chemical group 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000012230 colorless oil Substances 0.000 description 3
- 239000003480 eluent Substances 0.000 description 3
- OOCOAIUNIIDCOA-ZOWNYOTGSA-N ethyl methanesulfonate (2S)-2,5,7,8-tetramethyl-6-phenylmethoxy-3,4-dihydro-2H-chromene Chemical compound CS(=O)(=O)OCC.C(C1=CC=CC=C1)OC=1C(=C2CC[C@@H](OC2=C(C1C)C)C)C OOCOAIUNIIDCOA-ZOWNYOTGSA-N 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 239000011541 reaction mixture Substances 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- UCTSPYUHRANLOP-ZIAGYGMSSA-N (2r,6r)-1-bromo-2,6,10-trimethylundecane Chemical compound CC(C)CCC[C@@H](C)CCC[C@@H](C)CBr UCTSPYUHRANLOP-ZIAGYGMSSA-N 0.000 description 2
- OVBFMEVBMNZIBR-YFKPBYRVSA-N (2s)-2-methylpentanoic acid Chemical compound CCC[C@H](C)C(O)=O OVBFMEVBMNZIBR-YFKPBYRVSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 2
- VHPRYDYLHVUMCF-DAIKJZOUSA-M [Br-].C[C@@H](C[Mg+])CCC[C@@H](CCCC(C)C)C Chemical compound [Br-].C[C@@H](C[Mg+])CCC[C@@H](CCCC(C)C)C VHPRYDYLHVUMCF-DAIKJZOUSA-M 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000005457 ice water Substances 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- QARBMVPHQWIHKH-UHFFFAOYSA-N methanesulfonyl chloride Chemical compound CS(Cl)(=O)=O QARBMVPHQWIHKH-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 0.000 description 2
- QNVRIHYSUZMSGM-LURJTMIESA-N (2s)-hexan-2-ol Chemical compound CCCC[C@H](C)O QNVRIHYSUZMSGM-LURJTMIESA-N 0.000 description 1
- MZDYAVCNKNXCIS-ONEGZZNKSA-N (e)-pent-2-enamide Chemical compound CC\C=C\C(N)=O MZDYAVCNKNXCIS-ONEGZZNKSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- VHPRYDYLHVUMCF-UHFFFAOYSA-M CC(C[Mg]Br)CCCC(CCCC(C)C)C Chemical compound CC(C[Mg]Br)CCCC(CCCC(C)C)C VHPRYDYLHVUMCF-UHFFFAOYSA-M 0.000 description 1
- ONGYZXKOUUTMRL-UHFFFAOYSA-N COC[O] Chemical compound COC[O] ONGYZXKOUUTMRL-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- 239000012359 Methanesulfonyl chloride Substances 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 241000212342 Sium Species 0.000 description 1
- 241001104043 Syringa Species 0.000 description 1
- 235000004338 Syringa vulgaris Nutrition 0.000 description 1
- JEDZLBFUGJTJGQ-UHFFFAOYSA-N [Na].COCCO[AlH]OCCOC Chemical compound [Na].COCCO[AlH]OCCOC JEDZLBFUGJTJGQ-UHFFFAOYSA-N 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000004390 alkyl sulfonyl group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000012280 lithium aluminium hydride Substances 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- UKVIEHSSVKSQBA-UHFFFAOYSA-N methane;palladium Chemical compound C.[Pd] UKVIEHSSVKSQBA-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- DASJFYAPNPUBGG-UHFFFAOYSA-N naphthalene-1-sulfonyl chloride Chemical compound C1=CC=C2C(S(=O)(=O)Cl)=CC=CC2=C1 DASJFYAPNPUBGG-UHFFFAOYSA-N 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000012419 sodium bis(2-methoxyethoxy)aluminum hydride Substances 0.000 description 1
- 150000003459 sulfonic acid esters Chemical class 0.000 description 1
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 1
- 229960001295 tocopherol Drugs 0.000 description 1
- 239000011732 tocopherol Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C43/00—Ethers; Compounds having groups, groups or groups
- C07C43/02—Ethers
- C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
- C07C43/04—Saturated ethers
- C07C43/13—Saturated ethers containing hydroxy or O-metal groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C19/00—Acyclic saturated compounds containing halogen atoms
- C07C19/075—Acyclic saturated compounds containing halogen atoms containing bromine
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
- C07C53/126—Acids containing more than four carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
- C07D311/70—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with two hydrocarbon radicals attached in position 2 and elements other than carbon and hydrogen in position 6
- C07D311/72—3,4-Dihydro derivatives having in position 2 at least one methyl radical and in position 6 one oxygen atom, e.g. tocopherols
-
- 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
- C07F3/00—Compounds containing elements of Groups 2 or 12 of the Periodic Table
- C07F3/02—Magnesium compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyrane Compounds (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54416375A | 1975-01-27 | 1975-01-27 | |
| US05/587,570 US4016178A (en) | 1975-06-17 | 1975-06-17 | Synthesis of vitamin E |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH618695A5 true CH618695A5 (en) | 1980-08-15 |
Family
ID=27067526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH32576A CH618695A5 (en) | 1975-01-27 | 1976-01-13 | Process for the preparation of chromane derivatives |
Country Status (6)
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3309158A1 (de) * | 1983-03-15 | 1984-09-20 | Basf Ag, 6700 Ludwigshafen | Verbessertes verfahren zur herstellung von (alpha)-tocopherol |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA739471B (en) * | 1972-12-22 | 1974-08-28 | Hoffmann La Roche | Chromane derivatives |
-
1976
- 1976-01-13 CH CH32576A patent/CH618695A5/de not_active IP Right Cessation
- 1976-01-23 DE DE19762602509 patent/DE2602509A1/de not_active Withdrawn
- 1976-01-23 NL NL7600707A patent/NL7600707A/xx not_active Application Discontinuation
- 1976-01-26 JP JP673176A patent/JPS51100082A/ja active Pending
- 1976-01-26 FR FR7601974A patent/FR2313385A1/fr active Granted
- 1976-01-27 GB GB307976A patent/GB1488461A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL7600707A (nl) | 1976-07-29 |
| JPS51100082A (ja) | 1976-09-03 |
| FR2313385A1 (fr) | 1976-12-31 |
| GB1488461A (en) | 1977-10-12 |
| DE2602509A1 (de) | 1976-07-29 |
| FR2313385B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1979-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |