Class 562/857 - Phosgene reactant

Subclass of Class 562 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein phosgene is utilized as a reactant.
No. of patents: 34
Last issue date: 07/29/2008

Number	Title	Issue Date
7405331	High-purity (fluoroalkyl)benzene derivative and process for producing the same The process for producing a (fluoroalkyl)benzene derivative according to the present invention comprises a step of reducing the total content of group 3 to group 12 transition metals in an alkylbenzene derivative to 500 ppm or less in terms of metal atoms; a step of...	07/29/2008
7141704	Process for preparing hydrofluoroethers Process for obtaining hydrofluoroethers of formula (I): A-(Rf)n0—CF(Rf1)—O—Rh (I) wherein a mono- or bifunctional carbonyl compound of formula (IV): B—Rf—C(O)Rf1...	11/28/2006
7045592	Processes for coupling amino acids using bis-(trichloromethyl) carbonate A process is disclosed for using bis-(trichloromethyl)carbonate (triphosgene), diphosgene or phosgene as efficient and effective coupling reagents during coupling of carbohydrates to peptide chains. This process is particularly useful for the coupling to sterically ...	05/16/2006
7034181	Method for producing o-chloromethyl benzoic acid chlorides The invention relates to a method for producing o-chloromethyl benzoic acid chlorides of formula (I), in which R1 to R4 can be the same or different and represent hydrogen C1–C4 alkyl, halogen or trifluoromethyl, by reac...	04/25/2006
6770783	Method for producing acid chlorides The invention relates to a method for producing acid chlorides by converting carboxylic acids with carbon oxychlorides or thionyl chloride in the presence of a catalyst adduct of an N,N-disubstituted formamide of general formula (I) and carbon oxychloride or thionyl...	08/03/2004
6734322	Method for producing o-chloromethyl benzenecarbonyl chlorides The invention relates to a method for producing o-choromethyl benzenecarbonyl chlorides of formula (I), wherein R1-R4 can be the same or different and stand for hydrogen, C1-C4-alkyl, halogen or trifluoromnethyl, by conver...	05/11/2004
6433224	Method for producing carboxylic acid chlorides The invention relates to a process for the preparation of acid chlorides by reaction of carboxylic acids, carboxylic anhydrides, cyclic carboxylic esters or sulfonic acids with phosgene in the presence of a catalytic amount of a compound from the group co...	08/13/2002
6429334	Production of acid anhydrides and acid chlorides A process that can be used to produce an acid anhydride or acid chloride is provided. The process comprises contacting a reaction medium with a catalyst. The reaction medium comprises at least one organic acid, combination of the organic acid and phosgene...	08/06/2002
6262300	Method for producing chlorocarboxylic acid chlorides The present invention provides process for the preparation of chlorocarbonyl chlorides of the formula I R1 --CHCl--Y--COCl (I), where R1 is for example hydrogen or C1 - to C20 -alkyl and Y is for example a saturated or m...	07/17/2001
6124500	Process for synthesizing benzoic acids A nucleophilic substitution reaction on optionally substituted dihalobenzenes is carried out in the presence of an optional catalyst followed by formation of and subsequent carboxylation of a Grignard reaction intermediate. In particular the present inven...	09/26/2000
6002043	Phosgenation under pressure of acids and of anhydrides of acid chlorides Process for the phosgenation of monocarboxylic acids and/or anhydrides, characterized in that the acid and/or the anhydride is treated, in the presence or absence of solvent, with a molar excess of phosgene, preferably 2 to 15 times as much phosgene as ac...	12/14/1999
5912371	Method for preparing fatty acid chlorides A method for preparing fatty acid chlorides. The method comprises reacting a silylation product of a fatty acid comprising at 1east 2 aliphatically unsaturated bonds per molecule and a chlorinating agent....	06/15/1999
5792888	Process for phosgenation in the presence of acetonitrile Phosgenation of carboxylic acids to the corresponding carboxylic acid chlorides in conducted in the presence of a solvent comprising acetonitrile....	08/11/1998
5750779	Preparation process of acyl halide or sulfonyl halide A preparation process of acyl halide or sulfonyl halide which comprises reacting corresponding carboxylic acid or sulfonic acid with a haloiminium salt represented by the general formula (1): ##STR1## wherein R1 and R2 are same ...	05/12/1998
5543568	Preparation of ଱,ଲ-unsaturated ଲ-oxycarboxylic acid chlorides A process for the preparation of ଱,ଲ-unsaturated ଲ-oxycarboxylic acid chlorides of the formula I ##STR1## where R1 is a C-organic radical, and R2 and R3, independently of one another, are hydrogen or...	08/06/1996
5430186	Preparation of carboxylic chlorides A process for the continuous manufacture of carboxylic chlorides (I) of the general formula R-COCl, in which R stands for a C-organic radical containing from 1 to 30 C atoms, by the reaction of a carboxylic acid (II) with a reaction product (III) of phosg...	07/04/1995
5278328	Process for producing carboxylic acid chloride Disclosed is a process for producing a carboxylic acid chloride by reacting phosgene with a carboxylic acid or an anhydride thereof, which comprises effecting the reaction in the presence of a homopolymer or copolymer of a monomer represented by formula (...	01/11/1994
5200560	Preparation of carboxylic chlorides A process for the preparation of a carboxylic chloride of the general formula I ##STR1## in which R denotes C1 -C30 -alkyl, C2 -C30 -alkenyl or C2 -C30 -alkynyl, from a carboxylic acid...	04/06/1993
5166427	Preparation of acyl chlorides Acyl chlorides of the general formula ##STR1## where R is C8 -C30 -alkyl, C8 -C30 -alkenyl or C8 -C30 -alkynyl, are prepared from a carboxylic acid of the general formula II ##STR...	11/24/1992
5130478	Process for the preparation of chlorides of chlorinated carboxylic acids The invention relates to a process for the preparation of chlorides of chlorinated carboxylic acids of formula ##STR1## in which R2 denotes the radical (CH2)n, n being an integer from 2 to 4, or the radical --CH2...	07/14/1992
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
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
4880576	Acid halides, a process for their preparation An N-alkylated formamide of the formula ##STR1## wherein R1 denotes alkyl R2 denotes alkyl with at least 9 carbon atoms or the group ##STR2## wherein A denotes straight-chain or branched alkanediyl, R1 denotes lower a...	11/14/1989
4806286	Process for the preparation of acid chlorides by phosgenation of acids, and catalysts for this process The invention relates to a new process for the preparation of carboxylic acid chlorides by phosgenation of the corresponding carboxylic acid in the presence of a catalyst. This process is characterized in that the said catalyst is chosen from the compound...	02/21/1989
4764309	Preparation of chlorocarboxylic acid chlorides Chlorocarboxylic acid chlorides of the formula ##STR1## where R is H or alkyl and n is an integer from 2 to 4, are prepared by reacting a lactone of the formula ##STR2## with phosgene at elevated temperatures and in the presence of a quaternary ...	08/16/1988
4764310	Process for the preparation of aromatic carboxylic acid chlorides Aromatic carboxylic acid chlorides can be prepared from alkyl esters of aromatic carboxylic acids by reaction of the alkyl esters with phosgene at 100°-300° C. in the presence of organophosphorus compounds. This reaction can also be carried out in the p...	08/16/1988
4464307	Substituted acid chloride process The acid chlorides of N-substituted-2-aminocarboxylic acids are prepared by treating the carboxylic acids with phosgene in the presence of a catalytically effective amount of a water soluble tertiary amine, which acid chlorides are useful in the manufactu...	08/07/1984
4297301	Process for the manufacture of organic acid chlorides The invention relates to a process for the manufacture of carboxylic acid chlorides by the phosgenation, under the action of heat, of the corresponding acids in the presence of a catalyst. The process according to the invention is characterized in that a compo...	10/27/1981
4251457	Process for purification of the off-gases resulting from the production of benzoyl chloride from phosgene A process for purification of the off-gases resulting from the production of benzoyl chloride by phosgenation of benzoic acid from phosgene comprising recovery of phosgene from said off-gases by means of a selective absorbent, i.e. benzoyl chloride at a t...	02/17/1981
4213919	Manufacture of ଲ-chlorocarboxylic acid chlorides The manufacture of ଲ-chlorocarboxylic acid chlorides by reacting ଱ଲ-olefinically unsaturated carboxylic acids with phosgene is advantageously carried out by first at least partially reacting the unsaturated carboxylic acid with hydrogen ...	07/22/1980
4155937	Novel polymerization initiators Benzoyl peroxide compounds containing reactive substituents are used to initiate the formation of telechelic polymers....	05/22/1979
4052432	N-(1,1 Substituted acetonitrilo)-଱-(3,5-substituted phenoxy) alkyl amides N-(1,1 substituted acetonitrilo)-଱-(3,5-substituted phenoxy) alkyl amides compounds having the formula ##STR1## in which R1 and R2 are independently halogen or alkyl having 1 to 4 carbon atoms; R3 is alkyl havin...	10/04/1977
3963775	Process for the production of 3-oxoglutaric acid A feasible process for the production of 3-oxoglutaric acid is disclosed wherein ketene and phosgene are reacted in a molar ratio of ketene to phosgene of less than 2 in an organic solvent possessing a dielectric constant at 20°C between 2 and 22 and rea...	06/15/1976
3962326	Process for the manufacture of carboxylic acid chlorides Process for preparing carboxylic acid chlorides by reaction of carboxylic acids or carboxylic anhydrides with phosgene at temperatures of from 0° to 180°C in the presence of a catalyst, wherein 0.01 to 10 weight percent, calculated on the carboxylic aci...	06/08/1976

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Class 562/857 - Phosgene reactant