|7435849||Process for the production of acid chlorides|
A process for the preparation of acid halides of formula I which are useful as intermediates in the preparation of i.a. pharmaceutically active compounds. ...
|7102046||Process for the arylation of olefins|
The present invention relates to a process for the arylation of olefins by reaction of haloaromatics or arylsulfonates with olefins in the presence of a palladium catalyst, a bulky nitrogen base and a salt. ...
|7094926||Process for producing optically active carboxylic acid substituted in 2-position|
A nitrous acid salt is added at a temperature of 10 to 80° C. to an aqueous solution which contains an optically active 2-aminocarboxylic acid (4) and a protonic acid, the amount of the latter acid being 1 to 3 equivalents to the former, and which has a proton conc...
|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...
|6844468||Process for preparing substituted benzoyl chlorides|
The present invention relates to a process for preparing substituted benzoyl chlorides of the formula (1) where R, x and y have the meaning given below, which comprises reacting a benzaldehyde of the formula (2)
|6465700||Coupling reactions of 2-substituted, 7-haloindenes with aryl substituents to produce metallocene catalyst ligands|
Novel 2-substituted 7-haloindenes and methods for synthesizing such indenes are described. The 2-substituted 7-haloindenes may be coupled with any aryl group to produce a metallocene catalyst intermediate....
N,N-disubstituted formamides, wherein the substituents are selected to provide formamides which have low volatility, are useful as halogenation catalysts. Such catalysts are generally less hazardous to use than typical formamide halogenation catalysts bec...
|6166252||Process for preparing dichlorofluoroacetyl halides|
Process for preparing dichlorofluoroacetylfluoride (CFCl2 COF) comprising the following steps: a) fluorination with hydrofluoric acid (HF) of the trichloroacetyl halide in a fixed or fluidized tubular bed reactor, filled with fluorination catal...
|6114467||Semifluorinated acid halides and fluorinated polymers produced therefrom|
Compounds having the formula F(CF2)q --(CH2)p-1 --COX' wherein q ranges from 6-15, p ranges from 3-15 and X' is halogen are useful as reactants for hydroxylated block copolymers or polyamines to produce fluorina...
|5939586||Process for the production of intermediate for liquid crystal compound|
A process for the production of an intermediate for a liquid crystal compound, which comprises reacting an alkyloxybiphenylcarboxylic acid with purified thionyl chloride substantially free of sulfuryl chloride, the thionyl chloride being obtained by addin...
|5506358||Process for producing alkoxyiminoacetamide compounds|
There is disclosed a process for producing an alkoxyiminoacetamide compound which is useful as agricultural fungicides. Also dislclosed are novel intermediate compounds for the above process and their production....
|5504249||Preparation of o-chloromethylbenzoyl chlorides|
A process for preparing o-chloromethylbenzoyl chlorides of the formula I ##STR1## where m is 0 or an integer from 1 to 4 and X is halogen or C-organic radicals, entails reacting a corresponding lactone of the formula II ##STR2## with thionyl chloride...
|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
|5380855||Process for preparing N,N-substituted carbamoyl halides|
A process for preparing N,N-substituted carbamoyl halides comprising (a) contacting carbon dioxide and a secondary amine in the presence of an aprotic organic solvent and a base selected from the group consisting of a phosphazene compound, an organic, nit...
|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
|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...
|5319131||-fluoroacrylic acid esters and polymers thereof|
Esters of -fluoroacrylic acid are accessible by hydrolysis of an -hydroxymethyl--fluoromalonic acid ester, decarboxylation and dehydration of the hydrolysis product and subsequent esterification of the resulting -fluoroacrylic ...
|5202469||Partially fluorinated dicarboxylic acid and the acid chloride thereof, and a process for their preparation|
Partially fluorinated dicarboxylic acid and the acid chloride thereof, a process for its preparation and its use. The compound of the formula (I) ##STR1## and the acid chloride thereof are prepared by air oxidation in the presence of a catalyst mixtu...
2,3,4,5-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 R...
|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...
|4871484||Process for the preparation of 2,2-bis-chloro-methylalkanecarboxylic acid chlorides|
A process for the preparation of a 2,2-bis-chloro-methyl-alkanecarboxylic acid of the formula ##STR1## in which R is hydrogen, alkyl, cycloalkyl or optionally substituted phenyl, which comprises reacting an oxetane-3-carboxylic acid of the formula ...
|4851160||Process for the preparation of benzoic acid derivatives|
A process for the preparation of a compound of the formula ##STR1## in which X1 and X2 each independently is chlorine or fluorine, and Y is chlorine, bromine, fluorine or iodine, comprising subjecting a compound of the formula ...
|4755621||Process for the preparation of 2,3,5,6-tetrafluorobenzoic acid, and the new compounds 2,3,5,6-tetrachloro-4-trifluoromethyl-benzoyl chloride and 2,3,5,6-tetrafluoro-4-trifluoromethyl-benzoyl fluoride|
2,3,5,6-Tetrafluorobenzoic acid is prepared from 4-trifluoromethyl-benzoyl fluoride by chlorination, fluorination, hydrolysis, decarboxylation and saponification. The new compounds 2,3,5,6-tetrachloro-4-trifluoromethyl-benzoyl chloride and 2,3,5,6-te...
|4708825||Process for the production of penicillins|
The invention provides a novel method for producing phenylglycyl chloride hydrochlorides involving reaction of N-substituted phenylglycines with for example thionyl chloride and then gaseous hydrogen chloride, as well as certain novel starting materials f...
|4684733||Process for the preparation of intermediates of derivatives of pyrrolidine and piperidine|
An improved process for the preparation of certain antiarrhythmic agents in which a carbon atom of a piperidine or pyrrolidine ring is bonded directly or through a methylene group to the nitrogen of a substituted benzamido group from bromo- or hydroxy-sub...
|4565886||Ethynyl and substituted ethynyl-terminated polysulfones|
Ethynyl and substituted ethynyl-terminated polysulfones and a process for preparing the same are disclosed. These polysulfones are thermally cured to induce cross-linking and chain extension, producing a polymer system with improved solvent resistance and...
Compounds of the formula: ##STR1## wherein R1 is lower alkyl or benzyl. R2 is lower alkoxy, benzyloxy, or the group ##STR2## where R3 is lower alkoxy; and Ar is phenyl optionally substituted with 1 to 3 subs...
|4384139||Process for preparation of an optically active ଲ-mercaptoalkanoic acid|
A process is disclosed wherein an optically active ଲ-mercaptoalkanoic acid represented by formula (I): ##STR1## wherein R1 is lower alkyl having from 1 to 4 carbon atoms, is prepared by (1) reacting an optically active ଲ-hydrox...
|4382898||Process for the production of aromatic carboxylic acid chlorides|
A single-stage process for the production of pure, particularly sulphur-free, aromatic carboxylic acid chlorides by reacting an aromatic carboxylic acid containing from 1 to 3 carboxyl groups or a corresponding mixture of aromatic carboxylic acids with th...
|4382041||Process for the production of aromatic carboxylic acid chlorides|
A single-stage process for the production of pure aromatic carboxylic acid chlorides by reacting an aromatic carboxylic acid or an aromatic carboxylic acid mixture with thionylchloride in the presence of tert. phosphine as the catalyst....
|4377531||Method for the alkylation of phenylacetonitriles|
A method for the alkylation of certain substituted phenylacetonitriles with alkylhalides in the presence of solid particulated alkali metal hydroxides under essentially anhydrous conditions. Trialkylamine catalysts may optionally be utilized. Compounds ob...
Compounds of the formula: ##STR1## in which R1 is H, halogen, alkyl or alkoxy; R2 is H, halogen, alkyl or CF3 ; R3 is H, Cl, Br, alkyl or CN; R4 is H, halogen, alkyl, phenyl or halophenyl; and R
|4369146||Method for chlorinating the carboxylic group of -aminoacids|
A method for chlorinating the carboxylic group of -aminoacids (e.g. hydroxyphenyl-glycine) is described wherein the aminoacid is suspended in an optionally solvate-forming solvent, treated with an excess of gaseous HCl and then with a chlorinating ...
|4358607||Chloro-substituted benzospiro cyclopropane carboxylic acid|
The invention is a novel chloro-substituted cyclopropane carboxylic acid useful for the preparation of novel insecticidal-acaricidal pyrethroids....
|4335255||Alkyl perfluoro (2-methyl-5-oxo-3-oxahexanoate)|
Ketoester of the formula ##STR1## -carboxylate-ω-acyl fluoride of the formula ##STR2## vinyl ether of the formula ##STR3## divinyl ether of the formula ##STR4## allyl ether of the formula ##STR5## and film-formin...
|4323695||Process for making an acrylic monomer|
The invention relates to a novel process for making phenyl fluoroacrylate monomer. The monomer is obtained by reaction of a fluoroacrylic salt with an halogenating agent, followed by condensation of the fluoroacryloyl halogenide with phenol and recovery o...
4-ଲ, ଲ-dichlorovinyl (or dibromovinyl)-3,3-dimethylbutyrolactones are prepared from 1,1-dichloro (or dibromo)-4-methylpenta-1,3-diene by reacting with an acid of formula CH2 R.CO2 H in presence of a salt of a metal in one...
The invention is the compound (-)--cyano-m-phenoxybenzyl(+)--isopropyl-4-difluoromethoxyph enylacetate....
|4235927||Insecticidal benzylfurylmethyl perhaloalkylvinylcyclopropanecarboxylates|
Perhaloalkylvinylcyclopropanecarboxylates having the general formula ##STR1## are disclosed wherein one of Y and Z is a perhaloalkyl group and the other is hydrogen, halogen, or lower alkyl. Compounds in which R is hydroxy, halogen or lower alkoxy ar...
|4199527||Removal of ketene impurities in the preparation of alpha-cyano-aryloxybenzyl alcohols|
An improved process for preparation of insecticidal esters of alpha-cyano-m-aryloxybenzyl alcohols is disclosed which includes the steps of preparing an acid chloride of the formula: ##STR1## by reacting the corresponding acid with thionyl chloride, ...