US3317620A - Cis, cis-cyclodecadiene-(1, 6) and its manufacture - Google Patents
Cis, cis-cyclodecadiene-(1, 6) and its manufacture Download PDFInfo
- Publication number
- US3317620A US3317620A US358457A US35845764A US3317620A US 3317620 A US3317620 A US 3317620A US 358457 A US358457 A US 358457A US 35845764 A US35845764 A US 35845764A US 3317620 A US3317620 A US 3317620A
- Authority
- US
- United States
- Prior art keywords
- cis
- cyclodecadiene
- grams
- trans
- process according
- 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 - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 claims description 21
- 238000006317 isomerization reaction Methods 0.000 claims description 7
- 230000000737 periodic effect Effects 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000004215 Carbon black (E152) Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- ZWUBFMWIQJSEQS-UHFFFAOYSA-N 1,1-bis(ethenyl)cyclohexane Chemical compound C=CC1(C=C)CCCCC1 ZWUBFMWIQJSEQS-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 4
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- GCPCLEKQVMKXJM-UHFFFAOYSA-N ethoxy(diethyl)alumane Chemical compound CCO[Al](CC)CC GCPCLEKQVMKXJM-UHFFFAOYSA-N 0.000 description 4
- 150000004678 hydrides Chemical class 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- -1 hydrocarbon ring compound Chemical class 0.000 description 4
- 229910052763 palladium Inorganic materials 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 229910052723 transition metal Inorganic materials 0.000 description 4
- 238000004821 distillation Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 150000003624 transition metals Chemical class 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000007868 Raney catalyst Substances 0.000 description 2
- 229910000564 Raney nickel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 125000002534 ethynyl group Chemical class [H]C#C* 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- AQBLLJNPHDIAPN-LNTINUHCSA-K iron(3+);(z)-4-oxopent-2-en-2-olate Chemical compound [Fe+3].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O AQBLLJNPHDIAPN-LNTINUHCSA-K 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- BMGNSKKZFQMGDH-FDGPNNRMSA-L nickel(2+);(z)-4-oxopent-2-en-2-olate Chemical compound [Ni+2].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O BMGNSKKZFQMGDH-FDGPNNRMSA-L 0.000 description 2
- 150000002902 organometallic compounds Chemical class 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- ARKHCBWJALMQJO-UHFFFAOYSA-N 1,2-bis(ethenyl)cyclohexane Chemical compound C=CC1CCCCC1C=C ARKHCBWJALMQJO-UHFFFAOYSA-N 0.000 description 1
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- JQMFQLVAJGZSQS-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-N-(2-oxo-3H-1,3-benzoxazol-6-yl)acetamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)NC1=CC2=C(NC(O2)=O)C=C1 JQMFQLVAJGZSQS-UHFFFAOYSA-N 0.000 description 1
- 238000005952 Cope rearrangement reaction Methods 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- JUPWRUDTZGBNEX-UHFFFAOYSA-N cobalt;pentane-2,4-dione Chemical compound [Co].CC(=O)CC(C)=O.CC(=O)CC(C)=O.CC(=O)CC(C)=O JUPWRUDTZGBNEX-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- WJTCGQSWYFHTAC-UHFFFAOYSA-N cyclooctane Chemical compound C1CCCCCCC1 WJTCGQSWYFHTAC-UHFFFAOYSA-N 0.000 description 1
- 239000004914 cyclooctane Substances 0.000 description 1
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical class CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000006384 oligomerization reaction Methods 0.000 description 1
- JKDRQYIYVJVOPF-FDGPNNRMSA-L palladium(ii) acetylacetonate Chemical compound [Pd+2].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O JKDRQYIYVJVOPF-FDGPNNRMSA-L 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003623 transition metal compounds Chemical class 0.000 description 1
- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
- C07C15/40—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts substituted by unsaturated carbon radicals
- C07C15/42—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts substituted by unsaturated carbon radicals monocyclic
- C07C15/44—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts substituted by unsaturated carbon radicals monocyclic the hydrocarbon substituent containing a carbon-to-carbon double bond
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C11/00—Aliphatic unsaturated hydrocarbons
- C07C11/21—Alkatrienes; Alkatetraenes; Other alkapolyenes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C13/00—Cyclic hydrocarbons containing rings other than, or in addition to, six-membered aromatic rings
- C07C13/02—Monocyclic hydrocarbons or acyclic hydrocarbon derivatives thereof
- C07C13/271—Monocyclic hydrocarbons or acyclic hydrocarbon derivatives thereof with a nine- to ten- membered ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/02—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons
- C07C2/04—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition between unsaturated hydrocarbons by oligomerisation of well-defined unsaturated hydrocarbons without ring formation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/22—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by isomerisation
- C07C5/23—Rearrangement of carbon-to-carbon unsaturated bonds
- C07C5/25—Migration of carbon-to-carbon double bonds
- C07C5/2506—Catalytic processes
- C07C5/2556—Catalytic processes with metals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2531/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- C07C2531/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- C07C2531/22—Organic complexes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/18—Systems containing only non-condensed rings with a ring being at least seven-membered
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/18—Systems containing only non-condensed rings with a ring being at least seven-membered
- C07C2601/20—Systems containing only non-condensed rings with a ring being at least seven-membered the ring being twelve-membered
Definitions
- the present invention thus relates to cis, cis-cyclodecadime-(1,6) and to the manufacture of this hydrocarbon by isomerizing trans, cis-cyclodecadiene-(1,5) in the presence of catalytic quantities of active metals of Group VIII of the Periodic System.
- Isomerization can conveniently be effected at temperatures of 0100 C. and as active catalysts there may be named by way of example Raney metals or noble metals separated under hydrogenation conditions, such as palladium which has previously been named or platinum.
- the metals are obtained in active form by reducing the transition metal compounds with the aid of organo-metallic compounds of elements of Main Groups I to III of the Periodic System or of their hydrides or rather of their complex hydrides or even with these finely divided metals themselves.
- a further possibility lies in decomposing the labile olefineor cis-cyclodecadiene-( 1,6) of acetylene vr-complexes of the transition metals either by heat or through reduction of ligands. In this manner for instance bis-cyclooctadiene-(1,5) nickel yields with hydrogen, cyclo-octane and highly active nickel and bis- 1r-allyl-palladium propane and palladium.
- the process of the present invention can be carried out in presence of solvents, as for example, hexane, cyclohexane, benzol, ether or also alcohols when Raney metals are employed as catalysts.
- solvents as for example, hexane, cyclohexane, benzol, ether or also alcohols when Raney metals are employed as catalysts.
- the thermally unstable trans, cis-cyclodecadiene-(1,5) obtainable from butadiene and ethylene is converted to a stable isomer. It is recommended that the reaction product of the aforementioned process, containing cyclodecadiene-(1,5) is first caused to undergo isomerization, and thereafter the IO-ring component isolated in the form of the new stable isomer, for example by distillation. The cis, cis-cyclodecadiene-( 1,6) is then available for further reactions which call for higher temperatures.
- FIG. 1 illustrates the LR spectra of cis-trans-cyclodecadiene-(1,5)
- FIG. 2 illustrates the I-R spectra of cis, cis-cyclodecadiene-(1,6
- Example 1 1 gram of nickel (II) -acetylacetonate is reacted with 1 gram of diethyl aluminum ethoxide.
- the metallic nickel in highly active form thus obtained is' employed to isomerize 10 grams cis, trans-cyclodecadiene-(1,5). After working up there is obtained 3.9 grams (39%) divinylcyclohexane and 6.1 grams (61%) cis, cis-cyclodecadiene- (1,6).
- Example 2 1 gram cobalt (lII)-acetylacetonate, 1.1 gram diethyl aluminum ethoxide and 10 grams of cis, trans-cyclodecadiene-(l,5) are used for the reaction. After working up there is obtained 1.6 grams (16%) divinylcyclohexane, 1.1 grams (11%) of an unidentified C -hydrocarbon, 6.6 grams (66%) cis,cis-cyclodecadiene-(1,6) and 0.7 grams (7%) of an unidentified C -hydrocarbon.
- Example 3 1 gram iron (III) acetylacetonate, 1.1 gram diethylaluminum ethoxide and 10 grams cis, trans-cyclodecadicue-(1,5 are used for reaction. After working up there is obtained 3.7 grams (37%) divinylcyclohexane, 1.0 grams (10%) of an unidentified C -hydrocarbon, 4.8 grams (48%) cis, cis-cyclodecadiene-(1,6), and 0.5 grams (5%) of an unknown C -hydrocarbon.
- Example 4 0.5 grams palladium (II) acetylacetonate, 0.4 grams diethylaluminum ethoxide and 10 grams cis, trans-cyclo- J decadiene-(1,5) are used for reaction. After working up there is obtained 1.0 grams divinylcyclohexane and 9.0 grams (90%) of cis, cis-cyclodecadiene-(1,6).
- Example 5 2 grams Raney nickel are heated with grams cis, trans-cyclodecadiene-(1,5) for two days at 50 C. while stirring. Apart from 5.7 grams of unreacted cis, transproduct there can be isolated 9.3 grams (62%) cis, ciscyclodecadiene-( 1,6).
- said metal catalyst is obtained by reducing a transition metal with the aid of an organo-met-allic compound of an element of main Group I and III, its hydride or its complex hydride.
- Process according to claim 5 which comprises effecting said contacting in the presence of a solvent selected from the group consisting of ethers, aliphatic, cycloaliphatic, and aromatic hydrocarbon liquid in the reaction.
- catalyst is metallic palladium obtained by reduction of palladium- (lI)-acetylacetonate.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST20502A DE1230023B (de) | 1963-04-10 | 1963-04-10 | Verfahren zur Herstellung von cis, cis-Cyclodecadien-(1, 6) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3317620A true US3317620A (en) | 1967-05-02 |
Family
ID=7458598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US358457A Expired - Lifetime US3317620A (en) | 1963-04-10 | 1964-04-09 | Cis, cis-cyclodecadiene-(1, 6) and its manufacture |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3317620A (enExample) |
| BE (1) | BE646244A (enExample) |
| CH (1) | CH446312A (enExample) |
| DE (2) | DE1230023B (enExample) |
| GB (1) | GB1022875A (enExample) |
| NL (1) | NL139294B (enExample) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3407238A (en) * | 1965-09-13 | 1968-10-22 | Montedison Spa | Process for the preparation of cyclododecadienes |
| US5076460A (en) * | 1991-02-13 | 1991-12-31 | Hussell Donald E | Three ball snap hinge box |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2391596B1 (de) | 2009-01-28 | 2018-06-20 | Basf Se | Verfahren zur isolierung von dodecatrienal und seine verwendung als aromastoff |
| EP2391597B1 (de) | 2009-01-28 | 2018-08-22 | Basf Se | Verfahren zur herstellung von reinem cyclododecanon |
| DE102014212602A1 (de) | 2013-07-02 | 2015-01-08 | Basf Se | Verfahren zur Herstellung eines Ketons aus einem Olefin |
-
0
- DE DENDAT1288087D patent/DE1288087B/de active Pending
- BE BE646244D patent/BE646244A/xx unknown
-
1963
- 1963-04-10 DE DEST20502A patent/DE1230023B/de active Pending
-
1964
- 1964-04-08 CH CH445164A patent/CH446312A/de unknown
- 1964-04-09 US US358457A patent/US3317620A/en not_active Expired - Lifetime
- 1964-04-09 NL NL646403826A patent/NL139294B/xx unknown
- 1964-04-10 GB GB14467/62A patent/GB1022875A/en not_active Expired
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3407238A (en) * | 1965-09-13 | 1968-10-22 | Montedison Spa | Process for the preparation of cyclododecadienes |
| US5076460A (en) * | 1991-02-13 | 1991-12-31 | Hussell Donald E | Three ball snap hinge box |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1230023B (de) | 1966-12-08 |
| BE646244A (enExample) | 1900-01-01 |
| NL6403826A (enExample) | 1964-10-12 |
| DE1288087B (de) | 1969-01-30 |
| CH446312A (de) | 1967-11-15 |
| NL139294B (nl) | 1973-07-16 |
| GB1022875A (en) | 1966-03-16 |
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