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| Number | Title | Issue Date |
| 7138554 | Synthesis of (dibromocyclobuta) aromatic compounds A method for the synthesis of cyclobuta aromatic compounds by cyclizing two ortho dibromoalkyl substituents is described. Using a mediator, such as nickel metal, and continuous removal of product from contact with the mediator, high product yields are achieved. A me... | 11/21/2006 |
| 7078571 | Preparation of 1,3-di-halo-substituted benzene derivatives A process for preparing 1,3-di-halo-substituted benzene derivatives (II) from 2,6-di-halo-substituted benzaldehydes (I) (where X1, X2 are each independently F, Cl, Br, and R1, R2, R3 are each independently H, ha... | 07/18/2006 |
| 7060862 | Method for the preparation of α,α,α′,α′-tetrachloro-p-xylene with high purity A method of synthesizing a high purity product of α,α,α′,α′-tetrachloro-p-xylene is disclosed. The method includes carrying out a first stage reaction of terephthaldicarboxaldehyde with a mixture of SOCl2 and dimethylformamide (DMF) to obtain a pr... | 06/13/2006 |
| 7041859 | Method for halogenating or radiohalogenating a chemical compound A method for obtaining a halogenated organic compound, whereby an organotrifluoroborate compound is reacted with a halide ion in the presence of an oxidizing agent to produce the corresponding halogenated organic compound. The method may be used for producing radioh... | 05/09/2006 |
| 7026522 | Production of 2-amino-2-[2- (4-alkylphenyl) ethyl] propane-1, 3-diols Disclosed is a process for the production of 2-amino-2-[2-(4-C2-20-alkyl-phenyl)ethyl]propane-1,3-diols. ... | 04/11/2006 |
| 7012166 | Catalyst composition and method for chlorinating aromatic compounds Aromatic compounds such as toluene and o-xylene are chlorinated in the presence of a catalyst combination prepared by combining (A) at least one salt comprising a metal selected from the group consisting of a Group 4–12 metal, a lanthanide and an actinide; and a c... | 03/14/2006 |
| 6992231 | Method for the preparation of α,α, α′,α′-tetrachloro-p-xylene A synthesis method of α,α,α′,α′-tetrachloro-p-xylene is disclosed. The method includes reacting terephthaldicarboxaldehyde with a mixture of SOCl2 and dimethylformamide (DMF) to obtain a product mixture containing α,α,α′,α′-tetrachloro-p-x... | 01/31/2006 |
| 6956142 | Process for eco-friendly synthesis of bromobenzene A new eco-friendly process is described in the present invention for the preparation of bromobenzene through substitution of one of the C—H proton of benzene ring with a highly reactive hypobromous acid generated in situ, said process comprises the steps of activa... | 10/18/2005 |
| 6911558 | Method for purifying chloromethyl chloroformate Describes a method for obtaining substantially pure chloromethyl chloroformate from a chloroformate mixture comprising chloromethyl chloroformate and methyl chloroformate by heating the chloroformate mixture in a reaction zone at temperatures ranging from at least 5... | 06/28/2005 |
| 6528692 | Process for producing bromo-aromatic condensed ring compound Provided is a process for producing a bromo-aromatic condensed ring compound which comprises reacting an aromatic condensed ring compound in which the number of carbon atom constituting the aromatic condensed ring is 15 or more with a N-bromo carboxylic a... | 03/04/2003 |
| 6440892 | Method and catalyst composition for producing aromatic carbonates The present invention provides a method and catalyst composition for carbonylating aromatic hydroxy compounds, comprising the step of contacting at least one aromatic hydroxy compound with oxygen and carbon monoxide in the presence of a carbonylation cata... | 08/27/2002 |
| 6307105 | High purity preparation of fluorinated 1,3-dicarbonyls using BDM (bis-fluroxy difluoromethane) A process for providing an -fluorinated-ଲ-dicarbonyl includes electrophilically fluorinating a ଲ-dicarbonyl with bis-fluoroxydifluoromethane in the presence of an acid to provide the -monofluorinated-ଲ-dicarbonyl. The acid ... | 10/23/2001 |
| 6235949 | Process for the preparation of halogenated derivatives and Lewis acid base catalysts thereof A process for the preparation of halide compounds, preferably aryl halides, by contacting a gaseous mixture of hydrohalic acid and a compound selected from an aryl halogen formate, an aryl carbonate and equivalents thereof with a Lewis acid catalyst.... | 05/22/2001 |
| 6218564 | Process for the preparation of substituted aromatic compounds A process for the preparation of a substituted aromatic compound in which a chloroaromatic compound and an alkyl-, alkenyl- or aryl-boronic acid ester or anhydride are coupled in the presence of palladium and a lipophilic aliphatic phosphine comprising at... | 04/17/2001 |
| 5874655 | Process for the preparation of chlorinated aromatics Chlorinated aromatics are obtained in a simple manner and in particularly good yield if the corresponding chloroformic esters are heated in the liquid phase to 90° to 240° C. in the presence of an inert organic solvent and a catalytic amount of one or m... | 02/23/1999 |
| 5763702 | Method for production of benzene halilde A benzene halide is produced with high purity at a high yield by heating a halogen-substituted benzene carboxylic acid in the presence of a basic catalyst in a solvent.... | 06/09/1998 |
| 5710355 | Method of making chlorobenzenes Disclosed is a method of making a chlorobenzene having the general formulas ##STR1## where X is Cl or F, and X' is X or CF3. A compound having the formula ##STR2## is sulfonated using at least 2 moles per mole of said compound of a su... | 01/20/1998 |
| 5648570 | Process for preparing substituted chloroaromatics Substituted chloroaromatics are obtained in a simple manner in virtually isomer-free form when substituted phenols of the formula (II) ##STR1## where R1 to R5 are each, independently of one another, hydrogen, C1 -C | 07/15/1997 |
| 5504173 | Chemical process Process for preparing the (E)-isomer of a compound (II) by contacting the (E) or (Z) isomer of the 2-methylphenyl precursor, or a mixture of both, with bromine in an organic solvent, in the presence of a polymeric base and light. ##STR1##... | 04/02/1996 |
| 5420364 | Process for the preparation of halogenated aromatic compounds Halogenated aromatic compounds are prepared by passing esters of halogenoformic acid at temperatures in the range 150° to 600° C. and pressures from 0.1 to 3 bar over a catalyst containing chromium, magnesium, iron, silicon and/or aluminium, wherein if ... | 05/30/1995 |
| 5401896 | Process for preparing long chain alkyl aromatic compounds Relatively long chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively long chain alkylating agent under alkylation reaction conditions in the presence of catalyst comprising zeolite MCM-49.... | 03/28/1995 |
| 5306849 | Process for the preparation of halogenated aromatics Halogenated aromatics are prepared by heating halogenoformic acid esters to 80° to 280° C. in the presence of hydrogen fluoride or a catalytic amount of one or more Lewis acids from the group comprising aluminium halides, iron halides and antimony halid... | 04/26/1994 |
| 5144067 | Process for the coproduction of alkyl iodides and alpha-iodocarboxylic acids and/or anhydrides thereof Disclosed is a process for the coproduction of (1) an alkyl iodide and (2) an -iodocarboxylic acid, a mono--iodocarboxylic anhydride or a mixture thereof which comprises contacting a mixture of an iodine compound and a carboxylic anhydride w... | 09/01/1992 |
| 4935565 | Process and catalyst for hydrochlorination of hydrocarbons Methyl chloride is produced by contacting methanol and hydrogen chloride in the vapor phase in the presence of KZnCl3 supported on silica. The process produces methyl chloride in good yield with minimal formation of dimethyl ether as a by-produ... | 06/19/1990 |
| 4814467 | Processes using a phosphorus complex A process for chlorinating compounds containing a carbon atom bonded to a hetero-atom selected from the group consisting of oxygen, nitrogen and sulfur; said process comprises contacting the carbon hetero-atom containing compound with a chloro phosphorus ... | 03/21/1989 |
| 4814524 | Method for converting organic chloroformate to the corresponding organic chloride Organic haloformate, e.g., chloroformate, compounds are converted to their corresponding halides, e.g., chlorides, by heating the haloformate, e.g., between 90° C. and 150° C., in the presence of a catalytic amount of an organic quaternary salt, e.g., q... | 03/21/1989 |
| 4734533 | Process for the preparation of (2,2)-paracyclophane and derivatives thereof Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p.-methylbenzyltrimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is ca... | 03/29/1988 |
| 4730046 | Preparation of aryl halides A process for selectively substituting an aromatic nitro group with a halo group which comprises contacting the nitroaromatic compound with a phosphorushalide of formula: Rn PX5-n wherein n is selected from 0, 1, 2 and 3; R is select... | 03/08/1988 |
| 4721822 | Process for preparing 2,6-dichlorotoluene Liquid para-toluenesulfonyl chloride is reacted with chlorine gas at elevated temperatures in the presence of a catalytic amount of a Lewis acid catalyst, preferably antimony trichloride. Sulfuric acid is added then the reaction mixture is heated and subs... | 01/26/1988 |
| 4714785 | Method for converting organic chloroformate to the corresponding organic chloride Organic haloformate, e.g., chloroformate, compounds are converted to their corresponding halides, e.g., chlorides, by heating the haloformate, e.g., between 90° C. and 150° C., in the presence of a catalytic amount of a carbon catalyst for a time suffic... | 12/22/1987 |
| 4622431 | Method for converting organic chloroformate to the corresponding organic chloride Organic chloroformate compounds are decomposed to their corresponding chlorides by heating the chloroformate, e.g., between 100° and 175° C., in the presence of a catalytic amount of solid poly(vinylpyridine), e.g., poly(4-vinylpyridine), for a time suf... | 11/11/1986 |
| 4568782 | Preparation of indenes Disclosed is the vapor phase cyclodehydration of an aldehyde or ketone over a solid Lewis acid as catalyst to make indene or a substituted indene according to the equation: ##STR1##... | 02/04/1986 |
| 4319066 | Preparation of alkenyl aromatic compounds Cyclohexenyl and alkenyl aromatic compounds, such as cyclohexene and styrene, are prepared by a process comprising contacting a corresponding cyclohexyl or alkyl aromatic carboxylic acid, such as cyclohexyl carboxylic acid or 2-phenyl propionic acid, with... | 03/09/1982 |
| 4306103 | Process for the manufacture of 1,3,5-trichlorobenzene 1,3,5-trichlorobenzene is manufactured by treating 5-chloro-1,3-dinitrobenzene and/or 3,5-dichloronitrobenzene with chlorine, at a temperature from about 200° to 270° C., preferably from about 230° to 250° C. The resulting process product is an i... | 12/15/1981 |
| 4262157 | Decarboxylation process Decarboxylation of carboxylic acids using diazabicycloalkenes and, if desired, also a simple copper salt, as the means for decarboxylation.... | 04/14/1981 |
| 4250123 | Substituted phenylpropyl halides A novel process for the preparation of phenylpropyl halides of the formula ##STR1## by reacting the corresponding phenylpropyl halides, substituted only by R2 and R1, with an alcohol, alkyl halide or olefin; and phenylpropyl hal... | 02/10/1981 |
| 4156602 | 1-(1-Chloropropyl)-2,4,6-triisopropylbenzene and its use to control weeds Disclosed are 1-(1-chloropropyl)-2,4,6-triisopropylbenzene and the method of controlling weeds, particularly crabgrass, by preemergent application of the compound to the soil.... | 05/29/1979 |
| 4130574 | Method for increasing the hydrogen:carbon ratio of an organic compound A method for increasing the hydrogen:carbon ratio of an organic compound is disclosed. The organic compound can be one having any of the following functions: hydroxyl, carbonyl, epoxide, acetal, ketal, hemiacetal and hemiketal. The method involves introdu... | 12/19/1978 |
| 4075238 | Polyhalobenzylic disulfooxonium compounds Polyhalobenzylic disulfooxonium compounds are produced by the reaction of aromatic methyl, halomethyl or hydroxymethyl substituents with sulfur trioxide. The disulfooxonium salts are readily converted to alcohols by hydrolysis to provide monomers for the ... | 02/21/1978 |
| 4042600 | Pyrolysis of 2-sulfochloride benzoates Ortho-sulfobenzoic anhydride is synthesized by pyrolysis of the 2-sulfochloride benzoates. The benzoate intermediates are readily prepared by reacting either the esters of dithiodibenzoic acid with chloride water or the 2-diazonium chloride benzoates with... | 08/16/1977 |
