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| Number | Title | Issue Date |
| 7420097 | Synthesis of 6-aryl-6-alkyl fulvenes, 6-aryl-6-alkenyl fulvenes, and related compounds The present invention provides a method of making fulvenes, particularly 6-aryl-6-alkylfulvenes, 6-aryl-6-alkenylfulvenes, and related compounds, by combining alkyl- or alkenyl-arylketones with magnesium cyclopentadienyl reagents in nonprotic, including ethereal, so... | 09/02/2008 |
| 7151199 | Hydrocarbon conversion processes using non-zeolitic molecular sieve catalysts Hydrocarbon or oxygenate conversion process in which a feedstock is contacted with a non zeolitic molecular sieve which has been treated to remove most, if not all, of the halogen contained in the catalyst. The halogen may be removed by one of several methods. One m... | 12/19/2006 |
| 6995267 | Method for producing cyclopentadiene compounds A process for preparing substituted cyclopentadiene compounds and cyclopentadiene compounds which can be prepared thereby are described. ... | 02/07/2006 |
| 6953873 | Low-temperature hydrocarbon production from oxygenated hydrocarbons Disclosed is a method of producing hydrocarbons from oxygenated hydrocarbon reactants, such as glycerol, glucose, or sorbitol. The method can take place in the vapor phase or in the condensed liquid phase (preferably in the condensed liquid phase). The method includ... | 10/11/2005 |
| 6552239 | Synthesis of cyclopropaneacetylene by a one-pot process The present invention relates to a process for the preparation of cyclopropaneacetylene by reacting a ketophosphonate with a diazo-transfer reagent in the presence of non-nucleophilic base in an aprotic solvent to generate a reaction mixture containing a ... | 04/22/2003 |
| 6462206 | Catalytic reduction of ketones and aldehydes using organometallic ruthenium complexes Ketones and aldehydes are hydrogenated to the corresponding alcohol or alkyl group, using H2 gas as the stoichiometric reductant, and organometallic ruthenium complexes as the catalysts.... | 10/08/2002 |
| 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 product under base induced elimination conditions.... | 07/09/2002 |
| 6388151 | Synthesis of Tetraalkylcyclopentadienes A method for synthesizing tetramethylcyclopentadiene from 2,3-dibromobutane is described. A 2-bromo-2-butene Grignard is reacted with an ethyl formate to produce a 3,5-dimethyl-2,5-heptadiene-4-ol magnesium bromide which is then quenched with acetic acid ... | 05/14/2002 |
| 6288297 | Process for the preparation of cyclopropylacetylene The present invention relates generally to novel methods for the synthesis of cyclopropylacetylene which is an essential reagent in the asymmetric synthesis of (S)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one; a... | 09/11/2001 |
| 6002062 | Process for the preparation of ethynylcyclopropane Ethynylcyclopropane is prepared from (1,1-dimethoxyethyl)cyclopropane by a two-stage elimination of methanol. Ethynylcyclopropane is an intermediate in the synthesis of pharmaceutically active ingredients, for example, antiviral agents.... | 12/14/1999 |
| 5977421 | Pyrolysis method for increasing limonene production and novel oven to facilitate such method The amount of limonene produced during pyrolysis of scrap tire carcass or polyisoprene rubber can be increased by decreasing residence time of the isoprene gas produced during the thermal degradation of polyisoprene rubber in the high temperature reactor ... | 11/02/1999 |
| 5936134 | Method for obtaining storable products of calorific energy and synthetical oils, by processing waste rubber materials with coal A method for producing synthetical oils and storable products of calorific energy, by co-processing waste rubber materials, especially waste tires, and coal optionally in the presence of a material containing Fe as a catalyst, comprising the steps of mixi... | 08/10/1999 |
| 5900517 | Cyclopentadienyl derivatives and process for their preparation Cyclopentadienyl derivatives are described having general formula (I) ##STR1## where R, R1, R2, R4, equivalent to or different from one another, are selected from: --H, alkyl radicals having a number of carbon atoms f... | 05/04/1999 |
| 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 specific solid acid catalyst. The cyclopentadienes of the i... | 03/03/1998 |
| 5710299 | Production of bridged metallocene complexes and intermediates therefor Bridged metallocene compounds are produced by a process of promising commercial utility for plant-sized operations. The overall process involves the direct conversion of benzoindanones to benzoindanols which, without isolation, are converted to benzoinden... | 01/20/1998 |
| 5648578 | Preparation of polyalkylated cyclopentadienes from isobornyl carboxylates A process for preparing tetraalkylated cyclopentadienes comprises (a) pyrolyzing an isobornyl carboxylate so as to form a mixture of 1,2,3- and 1,2,4-trimethylcyclopentadienes, (b) alkylating said mixture with an alkylating agent so as to form a mixture o... | 07/15/1997 |
| 5600047 | Process for producing optically active olefin A process for producing an optically active olefin represented by a formula ##STR1## wherein R1 represents an organic group and X represents a polycyclic carbon ring group, by reacting a corresponding optically active ester derivative repr... | 02/04/1997 |
| 5434324 | Preparation of alkylcyclopentadienes Alkyl substituted cyclopentadienes are prepared by reacting cyclopentenones with a Grignard reagent followed by the acidification and dehydration of the resulting tertiary alcohol with an organic carboxylic acid.... | 07/18/1995 |
| 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 cyclopentenol with a catalyst selected from (1) crystallin... | 05/09/1995 |
| 5329056 | Preparation of substituted cyclopentadienes A process is provided for preparing an substituted cyclopentadiene by the steps of (a) reacting a vinyl ketone with a vinyl organometallic compound to form a divinyl tertiary alcohol and (b) dehydrating/cyclizing the tertiary alcohol such as with an acid ... | 07/12/1994 |
| 5082953 | Sulpholenes and processes for their preparation and use A sulpholene compound and more particularly 4,4-dimethyl-2,2-dioxo-1,2,4,5,6,7-hexahydro-benzo[c]thiophene. These compounds are prepared by bringing myrcene sulphone into contact with a strong acid. The compounds of the present invention can be used as ... | 01/21/1992 |
| 4935567 | Process for liquefying cellulose-containing biomass A cellulose-containing biomass such as wood is liquefied by heat-treatment under a pressurized condition in the presence of water and a neutral, oxygen-containing organic liquid such as an ester, ether, ketone or alcohol. An alkaline catalyst such as pota... | 06/19/1990 |
| 4895996 | Synthesis of alkenes from enamines via hydroboration Alkenes are prepared by the hydroboration of enamines followed by an elimination reaction to form the alkene. This process has wide applicability and is useful for the stereospecific synthesis of [Z] isomers. It is preferred to use 9-borabicyclo[3.3.1 non... | 01/23/1990 |
| 4886924 | Stereospecific synthesis of [E]-alkenes from enamines via hydroboration A process for the stereospecific synthesis of [E] alkenes from enamines comprising the steps of hydroborating the enamine; esterifying the organoborane so formed and oxidizing the boronic ester in the presence of hydrogen peroxide and in the absence of ad... | 12/12/1989 |
| 4849574 | Synthesis of olefins from ketones or aldehydes using bis(alkylchloroalumino)methane Ketones or aldehydes are methylenated to form the corresponding olefin by reaction with a bis(alkylchloroalumino)methane, e.g., in the form of its dietherate.... | 07/18/1989 |
| 4847425 | Prepartion of 4-isopropylcyclohexylmethanol and its alkyl ethers 4-isopropylcyclohexylmethanol and its alkyl ethers of the general formula I ##STR1## where R1 is H or C1 -C4 -alkyl, are prepared by a process in which the novel 4-(1-alkoxy-1-methylethyl)-benzaldehyde or its dialkyl ... | 07/11/1989 |
| 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 aluminosilicate catalyst containing an alkali metal.... | 03/21/1989 |
| 4788368 | Synthesis of olefins from ketones using a bis(substituted alumino) substituted methane Ketones are alkylenated to form the corresponding olefin by reaction with a bis(substituted alumino)substituted methane, e.g., in the form of its dietherate.... | 11/29/1988 |
| 4788367 | Synthesis of olefins from ketones using bis(alkylchloroalumino)methane Ketones are methylenated to form the corresponding olefin by reaction with a bis(alkylchloroalumino)methane, e.g., in the form of its dietherate.... | 11/29/1988 |
| 4751307 | Wittig-reaction processes Disclosed are improved Wittig reaction processes wherein the Wittig reaction is conducted in an anisole containing solvent.... | 06/14/1988 |
| 4728672 | Process for producing hydrocarbons A process for producing hydrocarbons which comprises bringing a gas mixture comprising hydrogen and carbon monoxide into contact with a catalyst comprising manganese oxide, alkali metal, sulfur, and ruthenium to produce hydrocarbons. The hydrocarbons form... | 03/01/1988 |
| 4636537 | Composition, method for preparing and use thereof Polymeric cyclopentadiene derivatives, method for preparing polymeric cyclopentadiene derivatives, and use of polymeric cyclopentadiene derivatives in curable binder compositions.... | 01/13/1987 |
| 4604480 | Method for the preparation of sulfones and compounds containing carbon chains having conjugated unsaturation and the compounds resulting from such method A method for the preparation of a first sulfone compound of the formula: ##STR1## wherein Ra is ##STR2## where Rb is Br and Rc is H except that Rb and Rc together may be an electron pair whe... | 08/05/1986 |
| 4517171 | Synthesis of H2 and CH4 from H2 S and CO Hydrogen and methane are synthesized from a gaseous feed comprising a mixture of H2 S and CO by contacting said feed with a catalyst comprising a sulfided rutile titania at a temperature of at least about 275° C.... | 05/14/1985 |
| 4499314 | Methanol conversion to hydrocarbons with zeolites and cocatalysts A process for producing hydrocarbons comprising contacting, under conversion conditions, an aqueous methanol with a crystalline aluminosilicate zeolite catalyst which is hydrothermally stable in the temperature range of from 250° C. to 500° C. and is ca... | 02/12/1985 |
| 4463194 | Process for making piperitone from plinols A process for making piperitone from crude plinols involving hydrogenating the crude plinols to form dihydroplinols and dehydrating the dihydroplinols to yield an iridene. The iridene is then oxidatively cleaved at the unsaturation to form an acyclic dion... | 07/31/1984 |
| 4443632 | Macrocyclic carbonyl compounds, process for their preparation and their use as starting materials for the preparation of bicyclic unsaturated hydrocarbons Compounds of formula ##STR1## having a double bond in one of the positions indicated by the dotted lines and wherein R represents a hydrogen atom or a methyl radical are utilized as starting materials for the preparation of bicyclic unsaturated ... | 04/17/1984 |
| 4436943 | Process for the preparation of 2,2-dicyclohexenylpropane 2,2-Dicyclohexenylpropane is prepared by heating 4,4'-dioxydicyclohexylpropane in the presence of a strong acid, under pressures from 1 to 50 mbar and at 120° to 220° C., distilling off the 2,2-dicyclohexenylpropane produced with the water formed a... | 03/13/1984 |
| 4433188 | Preparation of olefins from methanol and/or dimethyl ether A process for the preparation of lower olefins from methanol or dimethyl ether by catalytic conversion at from 300° to 550° C. in two stages over borosilicate zeolites, wherein C2 -C4 -olefins and C1 -C4 -para... | 02/21/1984 |
| 4418236 | Method of producing gasoline hydrocarbons from methanol Gasoline hydrocarbons are produced by a catalytic conversion of methanol under a pressure of about 5 to 100 bars and at temperatures of about 250° to 500° C. The high-hydrocarbon product of the conversion is cooled so as to condense gasoline hydrocarbon... | 11/29/1983 |
