CH629192A5 - Process for the preparation of optically active C(1)-C(3)-alkyl esters of 1-(1-phenylethyl)-1H-imidazole-5-carboxylic acid - Google Patents
Process for the preparation of optically active C(1)-C(3)-alkyl esters of 1-(1-phenylethyl)-1H-imidazole-5-carboxylic acid Download PDFInfo
- Publication number
- CH629192A5 CH629192A5 CH280676A CH280676A CH629192A5 CH 629192 A5 CH629192 A5 CH 629192A5 CH 280676 A CH280676 A CH 280676A CH 280676 A CH280676 A CH 280676A CH 629192 A5 CH629192 A5 CH 629192A5
- Authority
- CH
- Switzerland
- Prior art keywords
- imidazole
- phenylethyl
- carboxylic acid
- phenylethylamine
- acid
- Prior art date
Links
- RGYCCBLTSWHXIS-UHFFFAOYSA-N 3-(1-phenylethyl)imidazole-4-carboxylic acid Chemical compound C1=NC=C(C(O)=O)N1C(C)C1=CC=CC=C1 RGYCCBLTSWHXIS-UHFFFAOYSA-N 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 24
- 238000002360 preparation method Methods 0.000 title claims description 18
- 150000003839 salts Chemical class 0.000 claims description 40
- RQEUFEKYXDPUSK-UHFFFAOYSA-N 1-phenylethylamine Chemical compound CC(N)C1=CC=CC=C1 RQEUFEKYXDPUSK-UHFFFAOYSA-N 0.000 claims description 26
- 239000002253 acid Substances 0.000 claims description 26
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 14
- 239000011707 mineral Substances 0.000 claims description 14
- 230000001590 oxidative effect Effects 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims description 12
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 claims description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 239000003960 organic solvent Substances 0.000 claims description 6
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- RTCUCQWIICFPOD-UHFFFAOYSA-N 1-naphthalen-1-ylethanamine Chemical compound C1=CC=C2C(C(N)C)=CC=CC2=C1 RTCUCQWIICFPOD-UHFFFAOYSA-N 0.000 claims description 4
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 4
- 150000004820 halides Chemical class 0.000 claims description 3
- KHSYYLCXQKCYQX-UHFFFAOYSA-N 1-naphthalen-2-ylethanamine Chemical compound C1=CC=CC2=CC(C(N)C)=CC=C21 KHSYYLCXQKCYQX-UHFFFAOYSA-N 0.000 claims description 2
- 125000004343 1-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])(*)C([H])([H])[H] 0.000 claims description 2
- NKWCGTOZTHZDHB-UHFFFAOYSA-N 1h-imidazol-1-ium-4-carboxylate Chemical compound OC(=O)C1=CNC=N1 NKWCGTOZTHZDHB-UHFFFAOYSA-N 0.000 claims description 2
- 125000006273 (C1-C3) alkyl group Chemical group 0.000 claims 1
- ZOBYXAWBGJRPRG-UHFFFAOYSA-N 2-naphthalen-2-ylethanamine Chemical compound C1=CC=CC2=CC(CCN)=CC=C21 ZOBYXAWBGJRPRG-UHFFFAOYSA-N 0.000 claims 1
- NPUKDXXFDDZOKR-UHFFFAOYSA-N 3-(1-phenylethyl)-4-imidazolecarboxylic acid ethyl ester Chemical compound CCOC(=O)C1=CN=CN1C(C)C1=CC=CC=C1 NPUKDXXFDDZOKR-UHFFFAOYSA-N 0.000 claims 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- 239000000203 mixture Substances 0.000 description 19
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 18
- 239000000243 solution Substances 0.000 description 16
- 238000010992 reflux Methods 0.000 description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 8
- 239000011541 reaction mixture Substances 0.000 description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000000284 extract Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- RGYCCBLTSWHXIS-SECBINFHSA-N 1-[(1R)-1-phenylethyl]-1H-imidazole-5-carboxylic acid Chemical compound C1([C@@H](C)N2C(=CN=C2)C(O)=O)=CC=CC=C1 RGYCCBLTSWHXIS-SECBINFHSA-N 0.000 description 5
- HBAQYPYDRFILMT-UHFFFAOYSA-N 8-[3-(1-cyclopropylpyrazol-4-yl)-1H-pyrazolo[4,3-d]pyrimidin-5-yl]-3-methyl-3,8-diazabicyclo[3.2.1]octan-2-one Chemical class C1(CC1)N1N=CC(=C1)C1=NNC2=C1N=C(N=C2)N1C2C(N(CC1CC2)C)=O HBAQYPYDRFILMT-UHFFFAOYSA-N 0.000 description 5
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 5
- VUVQLDVUBATHKV-UHFFFAOYSA-N 3-(1-phenylethyl)imidazole-4-carbonyl chloride;hydrochloride Chemical compound Cl.C1=NC=C(C(Cl)=O)N1C(C)C1=CC=CC=C1 VUVQLDVUBATHKV-UHFFFAOYSA-N 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 4
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 4
- ZXIUPWHIKAQKOG-UHFFFAOYSA-N 1-(1-phenylethyl)imidazole Chemical compound C1=CN=CN1C(C)C1=CC=CC=C1 ZXIUPWHIKAQKOG-UHFFFAOYSA-N 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 3
- 229960001701 chloroform Drugs 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000147 hypnotic effect Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000012452 mother liquor Substances 0.000 description 3
- RQEUFEKYXDPUSK-SSDOTTSWSA-N (1R)-1-phenylethanamine Chemical compound C[C@@H](N)C1=CC=CC=C1 RQEUFEKYXDPUSK-SSDOTTSWSA-N 0.000 description 2
- KYWMCFOWDYFYLV-UHFFFAOYSA-N 1h-imidazole-2-carboxylic acid Chemical compound OC(=O)C1=NC=CN1 KYWMCFOWDYFYLV-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FHFZEKYDSVTYLL-UHFFFAOYSA-N Methomidate Chemical compound COC(=O)C1=CN=CN1C(C)C1=CC=CC=C1 FHFZEKYDSVTYLL-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- QOSMNYMQXIVWKY-UHFFFAOYSA-N Propyl levulinate Chemical compound CCCOC(=O)CCC(C)=O QOSMNYMQXIVWKY-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- -1 alkyl radical Chemical class 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- NPUKDXXFDDZOKR-LLVKDONJSA-N etomidate Chemical compound CCOC(=O)C1=CN=CN1[C@H](C)C1=CC=CC=C1 NPUKDXXFDDZOKR-LLVKDONJSA-N 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000003326 hypnotic agent Substances 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- CTSLXHKWHWQRSH-UHFFFAOYSA-N oxalyl chloride Chemical compound ClC(=O)C(Cl)=O CTSLXHKWHWQRSH-UHFFFAOYSA-N 0.000 description 2
- FWFGVMYFCODZRD-UHFFFAOYSA-N oxidanium;hydrogen sulfate Chemical compound O.OS(O)(=O)=O FWFGVMYFCODZRD-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- LKGPZAQFNYKISK-UHFFFAOYSA-N propoxate Chemical compound CCCOC(=O)C1=CN=CN1C(C)C1=CC=CC=C1 LKGPZAQFNYKISK-UHFFFAOYSA-N 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- MIOPJNTWMNEORI-GMSGAONNSA-N (S)-camphorsulfonic acid Chemical compound C1C[C@@]2(CS(O)(=O)=O)C(=O)C[C@@H]1C2(C)C MIOPJNTWMNEORI-GMSGAONNSA-N 0.000 description 1
- 206010002091 Anaesthesia Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000001949 anaesthesia Methods 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012069 chiral reagent Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- YCUUCSZGTWIJDW-RFVHGSKJSA-N ethyl 3-[(1r)-1-phenylethyl]imidazole-4-carboxylate;sulfuric acid Chemical compound OS(O)(=O)=O.CCOC(=O)C1=CN=CN1[C@H](C)C1=CC=CC=C1 YCUUCSZGTWIJDW-RFVHGSKJSA-N 0.000 description 1
- 229960001690 etomidate Drugs 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- MDBBRPQAWWLQAY-UHFFFAOYSA-N methyl 3-(1-phenylethyl)imidazole-4-carboxylate;sulfuric acid Chemical compound OS(O)(=O)=O.COC(=O)C1=CN=CN1C(C)C1=CC=CC=C1 MDBBRPQAWWLQAY-UHFFFAOYSA-N 0.000 description 1
- 229960002047 metomidate Drugs 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- UHZYTMXLRWXGPK-UHFFFAOYSA-N phosphorus pentachloride Chemical compound ClP(Cl)(Cl)(Cl)Cl UHZYTMXLRWXGPK-UHFFFAOYSA-N 0.000 description 1
- FAIAAWCVCHQXDN-UHFFFAOYSA-N phosphorus trichloride Chemical compound ClP(Cl)Cl FAIAAWCVCHQXDN-UHFFFAOYSA-N 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 229950005930 propoxate Drugs 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000006340 racemization Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- YBBRCQOCSYXUOC-UHFFFAOYSA-N sulfuryl dichloride Chemical compound ClS(Cl)(=O)=O YBBRCQOCSYXUOC-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
- C07D233/66—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D233/90—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Plural Heterocyclic Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55719475A | 1975-03-10 | 1975-03-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH629192A5 true CH629192A5 (en) | 1982-04-15 |
Family
ID=24224401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH280676A CH629192A5 (en) | 1975-03-10 | 1976-03-05 | Process for the preparation of optically active C(1)-C(3)-alkyl esters of 1-(1-phenylethyl)-1H-imidazole-5-carboxylic acid |
Country Status (27)
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE871675A (fr) * | 1977-12-02 | 1979-04-30 | Smithkline Corp | Procede de preparation de derives de l'imidazole |
| JPS5671074A (en) | 1979-11-12 | 1981-06-13 | Takeda Chem Ind Ltd | 1,2-disubstituted-4-halogenoimidazole-5-acetic acid derivative |
| JPS5671073A (en) | 1979-11-12 | 1981-06-13 | Takeda Chem Ind Ltd | Imidazole derivative |
| JPS58157768A (ja) * | 1982-03-16 | 1983-09-19 | Takeda Chem Ind Ltd | ４−クロロ−２−フエニルイミダゾ−ル−５−酢酸誘導体 |
| PL149675B1 (pl) * | 1986-03-10 | 1990-03-31 | Sposób wytwarzania nowych pochodnych kwasu 1-metyl0-1h-imidaz0l0karb0ksyl0weg0-5 | |
| RU2144022C1 (ru) * | 1995-10-30 | 2000-01-10 | Такеда Кемикал Индастриз, Лтд. | Эфиры n-(бифенилметил)аминобензойной кислоты и способ их получения |
| WO2009146024A1 (en) | 2008-03-31 | 2009-12-03 | The General Hospital Corporation | Etomidate analogues with improved pharmacokinetic and pharmacodynamic properties |
| EA027976B1 (ru) | 2012-01-13 | 2017-09-29 | Дзе Дженерал Хоспитал Корпорейшн | Анестезирующие соединения и способы их применения |
-
1976
- 1976-02-13 CA CA245,697A patent/CA1066709A/en not_active Expired
- 1976-02-18 GB GB6339/76A patent/GB1535566A/en not_active Expired
- 1976-02-19 SE SE7601959A patent/SE7601959L/xx not_active Application Discontinuation
- 1976-02-23 ES ES445450A patent/ES445450A1/es not_active Expired
- 1976-03-01 FR FR7605762A patent/FR2318159A1/fr active Granted
- 1976-03-03 BE BE164793A patent/BE839120A/xx not_active IP Right Cessation
- 1976-03-05 CH CH280676A patent/CH629192A5/de not_active IP Right Cessation
- 1976-03-08 IT IT48460/76A patent/IT1057941B/it active
- 1976-03-08 JP JP51024280A patent/JPS51115473A/ja active Pending
- 1976-03-08 CS CS761495A patent/CS203116B2/cs unknown
- 1976-03-08 LU LU74503A patent/LU74503A1/xx unknown
- 1976-03-08 DE DE19762609573 patent/DE2609573A1/de not_active Withdrawn
- 1976-03-08 NO NO760790A patent/NO144884C/no unknown
- 1976-03-08 DK DK99376*#A patent/DK99376A/da not_active Application Discontinuation
- 1976-03-09 IE IE482/76A patent/IE42652B1/en unknown
- 1976-03-09 ZA ZA761427A patent/ZA761427B/xx unknown
- 1976-03-09 AT AT171776A patent/AT353262B/de not_active IP Right Cessation
- 1976-03-09 HU HU76JA00000750A patent/HU172026B/hu unknown
- 1976-03-09 AU AU11806/76A patent/AU503733B2/en not_active Expired
- 1976-03-09 NL NL7602444A patent/NL7602444A/xx not_active Application Discontinuation
- 1976-03-09 PT PT64879A patent/PT64879B/pt unknown
- 1976-03-09 FI FI760601A patent/FI62292C/fi not_active IP Right Cessation
- 1976-03-09 YU YU00608/76A patent/YU60876A/xx unknown
- 1976-03-10 IL IL49190A patent/IL49190A/xx unknown
- 1976-03-10 BG BG032575A patent/BG24806A3/xx unknown
- 1976-03-10 PL PL1976187827A patent/PL99926B1/pl unknown
- 1976-03-10 SU SU762329945A patent/SU677656A3/ru active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |