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7019183 |
Process for producing adamantane compound
It is made possible to efficiently produce adamantane and analogues thereof, namely a hydrocarbon having an adamantane structure by a process which comprises isomerizing a tricyclic saturated...
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6566570 |
Process for preparing cyclic monomers
A process for producing an unsaturated cyclic compound, comprising the steps of hydrochlorinating a terpene to produce a hydrochlorinated terpene, and subjecting the hydrochlorinate terpene to...
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6512152 |
Tetracyclododecene compositions and process for producing the same
The present invention is drawn to a tetracyclododecene composition having a regulated cyclopentadiene trimer content, whereby addition polymerization with the aid of a Ziegler catalyst can be...
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6479719 |
Method and reactor for making norbornene
This process for the manufacture of norbornene from dicyclopentadiene (DCPD) and ethylene is characterized in that the DCPD is subjected to partial monomerization to CPD by preheating: at a...
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6465703 |
Process for the continuous preparation of tetracyclododecens
The present invention relates to a process for the preparation of tetracyclododecenes, which can be a raw material of cycloolefin (co)polymers possessing excellent characters concerning their...
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6417405 |
Synthesis of cyclopentadiene or substituted cyclopentadiene compounds
Substituted or unsubstituted cyclopentadienyl are prepared by reducing 4-ketocyclopentene to an alcohol, replacing the hydroxyl functionality with a leaving group and deprotonating the resulting...
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6414206 |
Process for preparing bisindenylalkanes
The present invention relates to a process for preparing bisindenylalkanes of formula I: wherein R 1 , R 2 , R 3 , and R 4 independently represent H or a C 1 -C 6 hydrocarbon group or R 1 and...
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6380450 |
Process for producing indene
Tetrahydroindene is dehydrogenated in a vapor phase in the presence of a metallic catalyst, e.g., a nickel-molybdenum catalyst, to produce indene, which is industrially useful in high yield while...
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6268518 |
Metallocene compounds and their use in catalysts for the polymerization of olefins
It is disclosed a new class of bridged metallocene compounds of formula (I): ##STR1## wherein R 1 and R 2 can be hydrogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; R 3 and R 4 ...
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6242413 |
Bicyclic aldehyde and ketone odorants
The invention relates to bicyclic aldehydes and ketones of formula (I): ##STR1## wherein n is 1 or 2; R 1 and R 4 are independently H or CH 3 ; and R 2 and R 3 are independently H,...
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6162937 |
Process for preparing cyclopentadienyl compounds
A process for preparing bis-cyclopentadienyl compounds bridged by a methylene group is reported, said process comprising reacting formaldehyde with a cyclopentadienyl compound in the presence of a...
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5888741 |
Computer-based design and screening of molecules using DNA interactions
It has been discovered that the degree of hormonal activity of candidate ligands correlates better with degree of fit into DNA than with the strength of receptor binding, and that the receptors in...
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5866706 |
Preparation and separation of RAC and MESO compound mixtures
Utilization of thermodynamic ratios to produce pure rac and pure meso isomers or a mixture thereof.
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5847247 |
Terpene-based solvents
The specification discloses terpene-based solvent compositions which comprise diterpenes as a major component and a minor amount of monoterpenes. The mixtures exhibit solvent properties similar to...
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5763717 |
Process for preparing hydroxybiphenyl
A description is given of the preparation of hydroxybiphenyl by dehydrogenation of completely or partially hydrogenated precursors using a supported Rh catalyst which additionally contains...
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5723709 |
Terpene dimer compositions and related methods of manufacture
Terpene dimer compositions are provided which dry into a hard, tack free film upon exposure to air. The compositions include a terpene dimer having the molecular formula C 20 H 32 and contain at...
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5723708 |
Method for producing cyclopentadienes
A method for producing cyclopentadienes which comprises the step of cyclodehydration of an unsaturated carbonyl compound having a specific chemical structure in a vapor phase in the presence of a...
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5670683 |
Racemic metallocene complexes and their preparation
Cyclopentadineyl compounds of the formula II ##STR1## and formula III ##STR2## their preparation and their use as intermediates in the preparation of metallocene complexes of the formula I.
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5670681 |
Process for preparing a carbon-bridged biscyclopentadiene compound
The present invention relates to a process for preparing a carbon-bridged biscyclopentadiene compound by reacting one or two cyclopentadiene compounds LH with a carbonyl compound in the presence of...
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5608131 |
Pentacyclic hydrocarbon compound and halogenated pentacyclic hydrocarbon compound, and preparation processes thereof
A process for the preparation of the compound of the formula ##STR1## comprising dimerizing norbornadiene in the presence of N-methylpiperidine and a combined catalyst of...
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5581004 |
Preparation and use of (2-butene-1,4-diyl) magnesium complexes in organic synthesis
The magnesium complexes of cyclic hydrocarbons and conjugated dienes, such as 1,2-dimethylenecycloalkanes and 1,3-butadienes, are readily prepared in high yields using highly reactive magnesium....
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5449847 |
Selective conversion of benzene to tercyclohexane
There is provided a process for preparing tercyclohexane by reacting benzene with hydrogen. The process involves the use of a catalyst comprising an acidic solid and a hydrogenation component. The...
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5446225 |
Palladium catalyzed akylative cyclization useful in syntheses of Vitamin D and analogues
An alkylative cycloaddition method is provided that is particularly useful for the synthesis of many of the Vitamin D analogues with differing side chains. Thus, a preferred synthesis is of Vitamin...
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5446222 |
Oligomers of cyclopentadiene and process for making them
The invention provides a two-step process for converting cyclopentadiene dimer to a high density fuel mixture comprising the steps of: (a) reacting said cyclopentadiene dimer in the presence of a...
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5444147 |
Cyclopropane monomers and polymers derived therefrom
Hydroxy-substituted-bis-phenyl cyclopropanes of formula (I): ##STR1## wherein R 1 and R 2 are selected from H or OH, at least one of R 1 and R 2 being o, m or p-OH, are useful as monomers to...
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5420320 |
Method for preparing cyclopentadienyl-type ligands and metallocene compounds
In accordance with the present invention there is provided a process for preparing a cyclopentadienyl-type ligand, the process comprises (1) reacting an alkali metal salt of a cyclopentadienyl-type...
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5414173 |
Process of preparing cyclopentadiene and substituted derivatives thereof
A process of preparing cyclopentadiene or substituted cyclopentadienes, such as tetramethylcyclopentadiene. The process involves contacting under reaction conditions cyclopentenol or a substituted...
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5338758 |
Bicyclic diterpene PAF antagonist compounds
Four bicyclic terpenes isolated from a culture broth of Phoma sp SCF0592, ATCC 74077, pharmaceutical compositions containing them and their use as PAF antagonists to treat allergic and inflammatory...
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5324876 |
Catalytic metal promoted cycloaddition process
Small catalytic amounts of a transition metal catalyst such as Cr(O) are used in a higher order cycloaddition process in which a triene is reacted with a diene or alkene to efficiently and...
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5310931 |
Isomerization of cycloolefin from endo-form to exo-form and copolymerization of cycloolefin and ethylene
This invention is to provide a novel process for the isomerization of a cycloolefin having an endo form to a cycloolefin having an exo form. The resulting isomer mixture has a novel composition,...
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5292977 |
Palladium catalyzed alkylative cyclization useful in synthesis of vitamin D and analogues
An alkylative cycloaddition method is provided that is particularly useful for the synthesis of many of the Vitamin D analogues with differing side chains. Thus, a preferred synthesis is of Vitamin...
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5233110 |
Process for the preparation of cyclooctene
A process for the preparation of cyclooctene which comprises irradiating 1,5-cyclooctadiene with light in the presence of a photodehydrogenation catalyst, acetone and an alcohol to partially...
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5220085 |
Preparation method of high density fuels by the addition-rearrangement of compound pentacyclo [7.5.1.O.sup.2,8.O.sup.3,7.-O.sup.10,14 ] pentadecane (C.sub.15 H.sub.22)
A method of preparing high density fuels by the addition-rearrangement of pentacyclo[7. 5. 1. O 2 ,8 . O 3 ,7 . O 10 ,14 ]pentadecane. The process comprises the steps of: (a) reacting...
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5157182 |
Dehydrocyclization of polysubstituted cyclic organic compounds over copper aluminum borate
A dehydrocyclization process is described for producing polynuclear organic compounds by contacting a starting organic material having at least one ring moiety comprising at least two adjacent ring...
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5143992 |
Methathesis polymerizable adducts of a divinylcyclohydrocarbon and cyclopentadiene
An improved thermoset polymer having good mechanical properties and no detectable dicyclopentadiene odor is obtained by the ring-opening polymerization of a novel mixture of adducts comprising...
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5043503 |
Production of lubricant stocks from polycyclic paraffins
Alkylated polycycloparaffinic compounds useful as lubricating stocks are prepared by alkylating a polycycloparaffinic compound with an alkylating agent under alkylation reaction conditions in the...
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4967033 |
Process for the preparation of polyunsaturated cyclic compounds
The polyunsaturated compounds of formula ##STR1## having two conjugated double bonds in the endo- and exo- positions of the pentagonal cycle indicated by the dotted lines, and wherein symbols R 1 ...
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4943302 |
Fuel composition with a high energy content
A fuel composition with a high energy content, for direct-ignition internal combustion engines contains a gasoline from petroleum and an amount of up to 90% by volume, as referred to the same fuel...
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4918158 |
1,3-diethynyladamantane and methods of polymerization thereof
1,3-Diethynyladamantane and a method of forming same by brominating adamantane to yield 1,3-dibromoadamantane, subjecting vinyl bromide to Friedel-Crafts alkylation with the 1,3-dibromoadamantane...
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4891460 |
Process for producing alkylidenenorbornenes
The present invention provides a process for producing alkylidenenorbornenes by reacting C 4 -C 6 acyclic conjugated dienes with cyclopentadiene, dicyclopentadiene, or a methyl- or...
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4873349 |
Ruthenium catalyst for biarylic coupling; new steganolides
A method for forming bridged biaryl compounds via the intramolecular oxidative biarylic coupling of precursor compounds containing two aromatic rings linked via a hydrocarbon chain is disclosed...
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4843185 |
Method for enhancing the polymerization activity of crude cycloolefin monomers for bulk polymerization
A process for enhancing the polymerization activity of mixtures of one or more cycloolefin monomers is provided by treatment with heat. This process can be easily incorporated into ring-opening,...
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4814532 |
Process for producing alkylcyclopentadiene derivatives
A process for producing an alkylcyclopentadiene derivative comprising the vapor-phase reaction of a cyclopentadiene derivative and an aliphatic lower alcohol in the presence of a basic crystalline...
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4804795 |
High-density fuel oil
The present invention provided a high-density fuel oil comprising an isomerized product prepared by isomerizing an alicyclic saturated hydrocarbon represented by the following formula in the...
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4755317 |
Working fluid for traction drive
The working fluid for traction drive use has a particularly high traction coefficient at high temperatures and the principal ingredient thereof is a decahydronaphthalene compound substituted, on...
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4744885 |
Hydro-carbon conversion using ferroaluminophosphates
Novel class of crystalline microporous ferroaluminophosphate compositions containing as lattice constituents in addition to AlO 2 and PO 2 structural units, ferric and/or ferrous iron in...
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4691036 |
Organic nickel compounds, the production thereof and the use thereof as polymerization catalysts
Nickel compounds which can be produced by reacting a nickel(O) compound or a nickel compound, which can be converted in situ into a nickel(O) compound, with an adduct or a mixture of maleic acid...
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4684754 |
Working fluid for traction drive
The working fluid for traction drive comprises (A) a compound having, in a molecule, two decahydronaphthalene rings bonded either directly to each other or to the same or different carbon atoms in...
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4668835 |
Novel tetracyclic trienes
The alkylation of para-substituted isopropyl benzenes with dipentenes employing an aluminum halide catalyst system produces novel tetracyclic compounds.
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4609481 |
Process for improving traction coefficient of traction drive fluid at high temperatures
A traction drive fluid composition comprising the principal component of at least one component represented by the general formula (I): ##STR1## wherein R 1 to R 5 are each a hydrogen or an alkyl...
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