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| Number | Title | Issue Date |
| 7321062 | Process for the preparation of (per) fluorinated mono-functional carbonyl compounds A process for the synthesis of (per)fluorinated mono-functional carbonyl compounds having the following formula: F—A—(RF)t—B—C(O)X1 (I) wherein: X1=F, CF3; t=... | 01/22/2008 |
| 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 |
| 6420601 | Process for the preparation of 3,5-bis(trifluoro-methyl)-benzoyl chlorides and novel 3,5-bis(tri-halogenomethyl)-and 3,5-dimethylbenzoyl halides 3,5-Bis(trifluoromethyl)benzoyl chlorides optionally substituted with fluorine or chlorine are advantageously prepared by converting 3,5-dimethylbenzoic acids optionally substituted with fluorine or chlorine into the corresponding acid chlorides; complete... | 07/16/2002 |
| 6417407 | Method of making 2-bromo-4-chloro substituted phenols A 2-bromo-4-chloro substituted phenol is prepared from a first composition of a substituted phenol and benzotrifluoride in a weight ratio to the substituted phenol of about 2 to about 4. Into the first composition is sparged about 1 to about 1.5 equivalen... | 07/09/2002 |
| 6187952 | Two-step production of 3-chloro-4-fluoro-benzoyl chloride by chlorination The present invention relates to a process for the preparation of 3-chloro-4-fluorobenzoyl chloride which comprises reacting 4-fluorobenzaldehyde with a chlorinating agent in the presence of a free-radical initiator in the presence or absence of a solvent... | 02/13/2001 |
| 6066764 | Production of 3-chloro-4-fluoro-benzoyl chloride by Lewis-acid catalyzed chlorination of the aromatic ring The present invention relates to halogenated aromatic derivatives, in particular 3-chloro-4-fluoro-benzoyl chloride having the following formula: ##STR1## The aforesaid derivative is advantageously used as base product for the preparation of flu... | 05/23/2000 |
| 5945565 | Process for the manufacture of acetonylbenzamides Novel routes for the preparation of acetonylbenzamides are provided by the reaction of an amine and acyl chloride. Novel routes to various intermediates used in the manufacture of acetonylbenzamides are also disclosed.... | 08/31/1999 |
| 5939581 | Processes for preparing hydrocinnamic acid Processes for preparing aromatic carboxylic acids. Cinnamaldehyde is hydrogenated to produce a mixture of hydrogenation products, namely, hydrocinnamaldehyde and hydrocinnamic alcohol. The mixture is then oxidized using a suitable oxidizing agent to subst... | 08/17/1999 |
| 5859298 | Process for the preparation of 2-halogeno-4,5-difluorobenzoyl fluorides 2-Halogeno-4,5-difluoro-benzoyl fluorides are obtained in high yields by reacting 2,4-dichloro-5-fluoro-benzoyl halides with potassium fluoride in an aprotic solvent. The 2-halogeno-4,5-difluoro-benzoyl fluorides prepared in this way are particularly suit... | 01/12/1999 |
| 5723613 | Process for the free-radical chlorination or bromination of methyl aromatic compounds Methyl aromatic compounds of the formula (I) ##STR1## in which R1, R2 and R3 have the meaning given in the description, can be reacted in an advantageous manner using free-radicals to give the associated trichlorometh... | 03/03/1998 |
| 5659078 | Process for the preparation of trichloroacetyl chloride The invention relates to a process for the preparation of trichloroacetyl chloride by reaction of acetyl chloride or acetaldehyde or chlorinated derivatives thereof with chlorine in the presence of active charcoal as the catalyst.... | 08/19/1997 |
| 5473095 | Process for the preparation of chlorinated 4,5-difluorobenzoic acids, -benzoic acid derivatives and -benzaldehydes The present invention relates to a process for the preparation of compounds of the formula ##STR1## in which R1 is --CN, --COOH, --COOR', R' being an organic radical having 1 to 6 carbon atoms, --CONH2, --COCl or --CHO and R | 12/05/1995 |
| 5380927 | Process for preparing optically active 2-aryl-alkanoic acids, in particular 2-aryl-propionic acids A chemical process is disclosed for the preparation of a pharmaceutically active compound in stereospecific form selected from the group of compounds having the formula: ##STR1## and their physiologically compatible salts and esters, wherein R is a ... | 01/10/1995 |
| 5362909 | Process for the preparation of 3-chloro-2,4,5-trifluorobenzoyl chloride, 2,4,5-trifuluorobenzoyl fluoride, and 2,3,4,5-tetrahalogenobenzene derivatives 2,4,5-Trihalogenobenzene derivatives of the formula ##STR1## in which R is --COOH, --COCl, --COF, --CN, --CONH2, --CH2 OH, --CH2 Cl, --CHCl2, --CCl3 or --CHO, R1 is H, Cl or F, and R2 | 11/08/1994 |
| 5344977 | Process for the preparation of 2,3-dibromopropionyl chloride An improved process for the preparation of 2,3-dibromopropionyl chloride, which comprises brominating acrylic acid, adding iron powder or an iron salt to the resultant melt, chlorinating the dibromopropionic acid obtained, and removing the volatile compon... | 09/06/1994 |
| 5312982 | Process for the preparation of ଲ-halogeno-tert.-alkyl-carboxylic acid chlorides The invention relates to a new process for the preparation of known ଲ-halogeno-tert.-alkylcarboxylic acid chlorides of the general formula (I) ##STR1## in which X represents chlorine, Y represents hydrogen or chlorine, R1 represents ... | 05/17/1994 |
| 5258547 | Process for preparing halogenated compounds A process for preparing halogenated compounds of formula RCY(Z)CH2 CH(X)C(CH3)CH2 COR1 where X, Y and Z are halo, R is alkyl, halo, haloalkyl or aryl, and R1 is hydroxy, halo, alkoxy, alkyl or haloalk... | 11/02/1993 |
| 5247105 | Fatty acid halogenide manufacture The invention provides a process for preparing fatty acid halide by reacting a fatty acid with a halogenating agent optionally followed by hydrolysis of unreacted halogenating agent and separating the fatty acid halide upper layer from the inorganic lower... | 09/21/1993 |
| 5126482 | Process for producing fluorine-containing carboxylic acids Novel fluorine-containing compounds and processes for producing the same are disclosed, the compounds being represented by the general formula (I): ##STR1## wherein R1 represents an alkyl group or an alkylvinyl group; R2 represe... | 06/30/1992 |
| 5072030 | Process for the fluorination of acrylic acid and derivatives thereof and novel fluorinated esters of 2,3-difluoropropionic acid Difluoropropionic acid and derivatives thereof are prepared by bringing elemental fluorine in the presence of a solvent into an addition reaction with appropriate acrylic acids or derivatives thereof. In this way, it is also possible to obtain novel fluor... | 12/10/1991 |
| 5003105 | Preparation of 2-chloroterephthaloyl chloride A process for preparing 2-chloroterephthaloyl chloride which comprises reacting terephthaloyl chloride with chlorine in the presence of an anhydrous ring chlorination catalyst. When the reaction mixture contains the desired amount of the monochloro produc... | 03/26/1991 |
| 4994610 | Process for preparing fluorinated benzoyl compounds Fluorinated benzoyl compounds of the formula: ##STR1## wherein Q is a lower alkyl group, a halogen atom, --CH2 CO2 R1 wherein R1 is a lower alkyl group, or ##STR2## wherein each of R2 and R | 02/19/1991 |
| 4978769 | Process for introducing fluorine atoms into aromatic rings by nucleophilic exchange Aromatic, ring-fluorinated compounds are particularly advantageously prepared by nucleophilic exchange in the course of reaction wih potassium fluoride in the presence of phase transfer catalysts and, if desired, solvents by carrying out the reaction in t... | 12/18/1990 |
| 4938898 | Alpha chlorination process employing antioxidants The present invention relates to improved processes for selectively chlorinating acyl compounds at the alpha or 2-position. The process of the present invention comprises a method of producing alpha-chloro acyl chlorides comprising contacting an acyl chlo... | 07/03/1990 |
| 4776986 | Synthesis of high purity 5-chloroisophthaloyl chloride A process for the preparation of high purity 5-chloroisophthaloyl chloride comprises reacting isophthaloyl chloride with liquid chlorine in the presence of a Lewis acid catalyst at a temperature of about 55° Celsius to 80° Celsius under autogenous press... | 10/11/1988 |
| 4770821 | Method for preparing ଲ-chloropivaloyl chloride There is provided a method for preparing ଲ-chloropivaloyl chloride which includes chlorinating pivalic acid to form pivaloyl chloride and reacting the resultant pivaloyl chloride with a chlorine gas in a gaseous phase to form ଲ-chloropivaloyl ... | 09/13/1988 |
| 4600787 | Process for the preparation of aromatic compounds which contain perfluorinated side-chains bonded via a heteroatom Aromatic compounds which contain perfluorinated side-chains bonded via a heteroatom are prepared by treating aromatic compounds, which contain side-chains which are perhalogenated, but only partially fluorinated, and bonded via heteroatom, with a catalyst... | 07/15/1986 |
| 4581179 | Process for the preparation of trifluoromethylbenzoyl chlorides and bromides from trifluoromethylbenzoyl fluorides Trifluoromethylbenzoyl chlorides or bromides are prepared by contacting trichloromethylbenzoyl chlorides or tribromomethylbenzoyl bromides with trifluoromethylbenzoyl fluorides in the presence of a halogen transfer catalyst.... | 04/08/1986 |
| 4560794 | Process for preparing methoxytrifluoromethylnaphthoic acid from methylnaphthoic acid A multi-step process is described for preparing a methoxytrifluoromethylnaphthoic acid of formula ##STR1## from 1-methyl-5-naphthoic acid and for preparing novel intermediate compounds of formula ##STR2## where X is chlorine or fluorine. Me... | 12/24/1985 |
| 4470930 | Preparation of nuclear chlorinated aromatic compounds Chloro-aromatic compounds of the formula ##STR1## wherein R is CF3, OCF3, OC2 F5, CN, NCO, or COCl, m is 0 or 1, and n is 0 or 1 are prepared by the vapor phase chloro-denitration reaction of a chlorinating... | 09/11/1984 |
| 4462937 | Process for the preparation of trifluoromethylbenzenes from the corresponding trichloro- or tribromo-methylbenzenes This invention relates to a continuous process for the preparation of trifluoromethylbenzenes from the corresponding trichloro- or tribromo-methylbenzenes with hydrofluoric acid. The process is characterized by passing an ascending stream of gaseous hydro... | 07/31/1984 |
| 4446075 | Substituted bromofluorobenzene derivatives and process for its manufacture Substituted bromofluorobenzene, wherein the fluorine is in para-position and the bromine in meta-position to another substituent, is prepared by direct bromination of the corresponding fluorobenzene derivative. Bromination is advantageously carried out in... | 05/01/1984 |
| 4404149 | Process for preparing 2,2-dichloroacetoacetyl chloride 2,2-Dichloroacetoacetyl chloride having the formula: ##STR1## Process for producing 2,2-dichloroacetoacetyl chloride wherein acetyl chloride is reacted by means of a Lewis acid as a catalyst with chlorine at a temperature of 30° to 60° C. The mole ... | 09/13/1983 |
| 4331613 | Process for the preparation of trifluoromethylnaphthalenes A process for the preparation of an optionally substituted trifluoromethyl-naphthalene which comprises contacting a compound of the formula ##STR1## in which R1 denotes hydrogen, alkyl, aralkyl, aryl, aryloxy, arylthio, polyhalogenoal... | 05/25/1982 |
| 4318866 | Chlorination of 4-methoxybenzoyl chloride An improved process for chlorinating 4-methoxybenzoyl chloride on the methyl group with molecular chlorine is done neat at elevated temperature in the absence of light of radical-forming intensity.... | 03/09/1982 |
| 4190600 | Process for the manufacture of m-halobenzoyl halides m-Halobenzoyl halides are prepared by chlorinating or brominating benzoyl chloride or benzoyl bromide in the absence of a solvent and in the presence of FeCl3 or FeBr3 as the catalyst and of sulfur and/or at least one inorganic and/o... | 02/26/1980 |
| 4173706 | Process for producing fluorinated organic compounds containing a difluoromethylene group from compounds comprising at least one carbonyl function A novel process for producing fluorinated organic compounds containing a difluoromethylene group, essentially characterized by reacting organic compounds containing a carbonyl function with molybdenum hexafluoride at room temperature and under atmospheric... | 11/06/1979 |
| 4169847 | Process for the manufacture of -chloroalkanoyl chlorides An improved process for the production of -chloroalkanoyl chlorides by reaction of alkanoyl chlorides with chlorine at elevated temperatures is described in which process chlorosulphonic acid is used as catalyst.... | 10/02/1979 |
| 4148811 | Halogenation process Halogenation is carried out regiospecifically in the presence of a cyanoquinone.... | 04/10/1979 |
| 4117006 | Selective chlorination of benzoyl chloride The novel process of the invention comprises selectively chlorinating benzoyl chloride in the absence of a solvent to about 7-8% unconverted benzoyl chloride, and recovering the resultant 3-chlorobenzoyl chloride in high yield from the reaction product mi... | 09/26/1978 |
