JPS6365676B2 - - Google Patents
Info
- Publication number
- JPS6365676B2 JPS6365676B2 JP62160812A JP16081287A JPS6365676B2 JP S6365676 B2 JPS6365676 B2 JP S6365676B2 JP 62160812 A JP62160812 A JP 62160812A JP 16081287 A JP16081287 A JP 16081287A JP S6365676 B2 JPS6365676 B2 JP S6365676B2
- Authority
- JP
- Japan
- Prior art keywords
- formula
- norbornadiene
- clo
- camphanyl
- phosphine
- 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.)
- Expired
Links
- 150000001875 compounds Chemical class 0.000 claims description 15
- 238000005984 hydrogenation reaction Methods 0.000 claims description 13
- 229910020366 ClO 4 Inorganic materials 0.000 claims description 12
- SJYNFBVQFBRSIB-UHFFFAOYSA-N norbornadiene Chemical group C1=CC2C=CC1C2 SJYNFBVQFBRSIB-UHFFFAOYSA-N 0.000 claims description 9
- 125000002524 organometallic group Chemical group 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 7
- 229910052703 rhodium Inorganic materials 0.000 claims description 7
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical group [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 7
- PRBHEGAFLDMLAL-UHFFFAOYSA-N 1,5-Hexadiene Chemical group CC=CCC=C PRBHEGAFLDMLAL-UHFFFAOYSA-N 0.000 claims description 6
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 claims description 6
- RRKODOZNUZCUBN-CCAGOZQPSA-N (1z,3z)-cycloocta-1,3-diene Chemical group C1CC\C=C/C=C\C1 RRKODOZNUZCUBN-CCAGOZQPSA-N 0.000 claims description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- 150000001450 anions Chemical class 0.000 claims description 3
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims description 3
- 239000002815 homogeneous catalyst Substances 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 1
- 239000000243 solution Substances 0.000 description 26
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 24
- 238000006243 chemical reaction Methods 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 9
- -1 p-toluenesulfonyloxy group Chemical group 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 8
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 8
- 238000003756 stirring Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 5
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 4
- 238000000862 absorption spectrum Methods 0.000 description 4
- 238000000921 elemental analysis Methods 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 150000002596 lactones Chemical group 0.000 description 4
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 4
- 239000012299 nitrogen atmosphere Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000012280 lithium aluminium hydride Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000003003 phosphines Chemical class 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 2
- VCVHKNDGQGXNTA-UHFFFAOYSA-N 2-(3-benzoylphenyl)prop-2-enoic acid Chemical compound OC(=O)C(=C)C1=CC=CC(C(=O)C=2C=CC=CC=2)=C1 VCVHKNDGQGXNTA-UHFFFAOYSA-N 0.000 description 2
- ZURRKVIQUKNLHF-UHFFFAOYSA-N 4,7,7-trimethylbicyclo[2.2.1]heptane-3-carboxylic acid Chemical compound C1CC2(C)C(C(O)=O)CC1C2(C)C ZURRKVIQUKNLHF-UHFFFAOYSA-N 0.000 description 2
- LSPHULWDVZXLIL-UHFFFAOYSA-N Camphoric acid Natural products CC1(C)C(C(O)=O)CCC1(C)C(O)=O LSPHULWDVZXLIL-UHFFFAOYSA-N 0.000 description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 2
- LSPHULWDVZXLIL-QUBYGPBYSA-N camphoric acid Chemical compound CC1(C)[C@H](C(O)=O)CC[C@]1(C)C(O)=O LSPHULWDVZXLIL-QUBYGPBYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000012043 crude product Substances 0.000 description 2
- GPAYUJZHTULNBE-UHFFFAOYSA-N diphenylphosphine Chemical class C=1C=CC=CC=1PC1=CC=CC=C1 GPAYUJZHTULNBE-UHFFFAOYSA-N 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 239000012442 inert solvent Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000013076 target substance Substances 0.000 description 2
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 2
- MIYQNOPLWKCHED-JTQLQIEISA-N (2s)-2-benzamido-3-methylbutanoic acid Chemical compound CC(C)[C@@H](C(O)=O)NC(=O)C1=CC=CC=C1 MIYQNOPLWKCHED-JTQLQIEISA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- NQNREXCDJXJCPG-UHFFFAOYSA-N 1-cyclohexylethenyl acetate Chemical compound CC(=O)OC(=C)C1CCCCC1 NQNREXCDJXJCPG-UHFFFAOYSA-N 0.000 description 1
- JAVZALBKNIHSLL-UHFFFAOYSA-N 1-cyclohexylethyl acetate Chemical compound CC(=O)OC(C)C1CCCCC1 JAVZALBKNIHSLL-UHFFFAOYSA-N 0.000 description 1
- MECSANHKBWVVGI-UHFFFAOYSA-N 1-ethyl-2,2-dimethylcyclopentane-1,3-dicarboxylic acid Chemical compound CCC1(CCC(C(O)=O)C1(C)C)C(O)=O MECSANHKBWVVGI-UHFFFAOYSA-N 0.000 description 1
- VLUWDAHVYCOUSR-UHFFFAOYSA-N 2-acetyloxy-3-phenylpropanoic acid Chemical compound CC(=O)OC(C(O)=O)CC1=CC=CC=C1 VLUWDAHVYCOUSR-UHFFFAOYSA-N 0.000 description 1
- YYROPELSRYBVMQ-UHFFFAOYSA-N 4-toluenesulfonyl chloride Chemical compound CC1=CC=C(S(Cl)(=O)=O)C=C1 YYROPELSRYBVMQ-UHFFFAOYSA-N 0.000 description 1
- RBWNDBNSJFCLBZ-UHFFFAOYSA-N 7-methyl-5,6,7,8-tetrahydro-3h-[1]benzothiolo[2,3-d]pyrimidine-4-thione Chemical group N1=CNC(=S)C2=C1SC1=C2CCC(C)C1 RBWNDBNSJFCLBZ-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000009876 asymmetric hydrogenation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- OBTIDFCSHQLONE-UHFFFAOYSA-N diphenylphosphane;lithium Chemical compound [Li].C=1C=CC=CC=1PC1=CC=CC=C1 OBTIDFCSHQLONE-UHFFFAOYSA-N 0.000 description 1
- PSJBWGOXVCPDTJ-UHFFFAOYSA-N diphenylphosphane;potassium Chemical compound [K].C=1C=CC=CC=1PC1=CC=CC=C1 PSJBWGOXVCPDTJ-UHFFFAOYSA-N 0.000 description 1
- ILCLANVYOPHXJF-UHFFFAOYSA-N diphenylphosphane;sodium Chemical compound [Na].C=1C=CC=CC=1PC1=CC=CC=C1 ILCLANVYOPHXJF-UHFFFAOYSA-N 0.000 description 1
- YWEUIGNSBFLMFL-UHFFFAOYSA-N diphosphonate Chemical compound O=P(=O)OP(=O)=O YWEUIGNSBFLMFL-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- OYJXTOVLKZDGFK-UHFFFAOYSA-N ethanol;2-propan-2-yloxypropane Chemical compound CCO.CC(C)OC(C)C OYJXTOVLKZDGFK-UHFFFAOYSA-N 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- LDLDYFCCDKENPD-UHFFFAOYSA-N ethenylcyclohexane Chemical compound C=CC1CCCCC1 LDLDYFCCDKENPD-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 238000009905 homogeneous catalytic hydrogenation reaction Methods 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- DKYWVDODHFEZIM-UHFFFAOYSA-N ketoprofen Chemical compound OC(=O)C(C)C1=CC=CC(C(=O)C=2C=CC=CC=2)=C1 DKYWVDODHFEZIM-UHFFFAOYSA-N 0.000 description 1
- 150000002641 lithium Chemical group 0.000 description 1
- 125000005948 methanesulfonyloxy group Chemical group 0.000 description 1
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 1
- NHKJPPKXDNZFBJ-UHFFFAOYSA-N phenyllithium Chemical compound [Li]C1=CC=CC=C1 NHKJPPKXDNZFBJ-UHFFFAOYSA-N 0.000 description 1
- 125000004437 phosphorous atom Chemical group 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- IXFNJWPLHOWEPT-UHFFFAOYSA-M silver;perchlorate;hydrate Chemical compound O.[Ag+].[O-]Cl(=O)(=O)=O IXFNJWPLHOWEPT-UHFFFAOYSA-M 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 125000004436 sodium atom Chemical group 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- NBRKLOOSMBRFMH-UHFFFAOYSA-N tert-butyl chloride Chemical compound CC(C)(C)Cl NBRKLOOSMBRFMH-UHFFFAOYSA-N 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Catalysts (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT23363/80A IT1198341B (it) | 1980-07-10 | 1980-07-10 | Catalizzatore omogeneo per idrogenazione asimmetrica |
| IT23363A/80 | 1980-07-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6354388A JPS6354388A (ja) | 1988-03-08 |
| JPS6365676B2 true JPS6365676B2 (it) | 1988-12-16 |
Family
ID=11206418
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15454680A Granted JPS5732292A (en) | 1980-07-10 | 1980-10-31 | Camphanyl-diphenyl-phosphine, manufacture and catalyst therefor |
| JP62160812A Granted JPS6354388A (ja) | 1980-07-10 | 1987-06-27 | カンファニル−ジフェニル−ホスフィンを含有する有機金属錯体、その製法および該錯体からなる均一触媒 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15454680A Granted JPS5732292A (en) | 1980-07-10 | 1980-10-31 | Camphanyl-diphenyl-phosphine, manufacture and catalyst therefor |
Country Status (2)
| Country | Link |
|---|---|
| JP (2) | JPS5732292A (it) |
| IT (1) | IT1198341B (it) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021024634A1 (ja) * | 2019-08-05 | 2021-02-11 | パナソニックＩｐマネジメント株式会社 | レーダ装置 |
-
1980
- 1980-07-10 IT IT23363/80A patent/IT1198341B/it active
- 1980-10-31 JP JP15454680A patent/JPS5732292A/ja active Granted
-
1987
- 1987-06-27 JP JP62160812A patent/JPS6354388A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021024634A1 (ja) * | 2019-08-05 | 2021-02-11 | パナソニックＩｐマネジメント株式会社 | レーダ装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8023363A0 (it) | 1980-07-10 |
| JPS5732292A (en) | 1982-02-20 |
| JPS6354388A (ja) | 1988-03-08 |
| IT1198341B (it) | 1988-12-21 |
| JPS6261035B2 (it) | 1987-12-18 |
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