Matches 201 - 250 out of 385 < 1 2 3 4 5 6 7 8 >
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4925958 Process for the preparation of N-alkoxycarbonylmethyl-N-formyl-amines and -anilines  
The invention relates to a process for the preparation of compounds of the formula I ##STR1## in which R 1 denotes (substituted) aryl or (substituted) cyclohexyl and R 2 =alkyl, in which a...
4910282 Low glass transition temperature aromatic polyamide  
There is provided an aromatic polyamide having repeating units of the formula: ##STR1## wherein X is -O-, -S-, -CO- or -SO 2 - and y has a value of 1 or 2. Also provided is an aromatic polyamide...
4906662 Phenol derivatives, their preparation and the use thereof  
Disclosed are phenol derivatives of the formula ##STR1## wherein R 1 is a substituted phenyl group, R 2 and R 3 are C 1 -C 6 alkyl group and of the formula ##STR2## wherein R 8 , R 9 and R 10...
4886888 Extraction of amino an acid from aqueous mixtures thereof  
Amino acids can be purpified and/or concentrated by extracting aqueous mixtures such as fermentation broths by contacting an aqueous mixture containing amino acids with an organic solution...
4886889 Process for recovery of an amino acid from aqueous mixtures thereof  
Disclosed is a process for recovery of amino acids from aqueous mixtures. In particular, it relates to a treatment of said amino acid containing aqueous mixture prior to extraction of the amino...
4883883 Novel n[meth)allyloxy(meth)allylphenyl]maleimides and thermosetting imido copolymers prepared therefrom  
Novel N-[(meth)allyloxy-mono-/di(meth)allylphenyl]maleimides, in admixture with at least one N-[(meth)allyloxyphenyl]maleimide, are reacted with at least one bismaleimide, and optionally a...
4870096 5-substituted 3-aninoalkyl indoles  
Indoles are disclosed of formula (I): ##STR1## wherein R 1 represents R 5 R 6 NCOCH 2 --, R 5 CONH(CH 2 ) p --, R 5 R 6 NSO 2 (CH 2 ) p -- or R 7 SO 2 NH(CH 2 ) p --, (where R 5 ...
4863942 Novel resorcinol ethers and anti-inflammatory and anti-allergic use thereof  
Novel 4-acylresorcinol ethers of the formula ##STR1## in which R 1 represents lower alkyl, R 2 represents lower alkyl, lower alkenyl or lower alkynyl, R 3 represents hydrogen, lower alkoxy,...
4859206 Hair dye preparations containing nitrodiphenylamine derivative  
This invention encompasses compounds of the formula ##STR1## wherein R 1 and R 2 independently are hydrogen, C 1 -4 alkyl, or C 2 -4 hydroxyalkyl; one of R 3 to R 7 is --SO 3 H or --COOH; and...
4845281 Method of preparing ketoprofen  
A method of preparing ketoprofen by reacting aniline with a halide of an alpha-halogen propionic acid, benzylation of 3-methyl-2-indolinone, alkaline hydrolysis of 5-benzyl-3-methyl-2-indolinone,...
4832697 Hair dye preparations containing substantive nitrodiphenylamine derivatives  
This invention encompasses compounds of the formula: ##STR1## wherein: one of R 1 or R 2 is nitro and the other is --SO 3 H or COOH; and one of R 3 or R 4 is hydrogen and the other is --NR...
4833247 Process for the production of 2-benzyl fatty acids  
A process for the production of 2-benzyl fatty acids and esters thereof corresponding to the following formula ##STR1## comprising reacting 2-fatty alkyl-4,4-dimethyl-2-oxazolines with...
4820726 Oxaloamino substituted fluorinated resorcinol ethers and anti-allergic and anti-inflammatory use thereof  
4-Acylresorcinol esthers of the formula ##STR1## in which R 1 is lower alkyl, R 2 is fluorinated lower alkyl, R 3 is hydrogen, lower alkoxy, trifluoromethyl or halogen, alk is an alkylene or...
4791215 Derivatives of glutamic acid and aspartic acid  
New derivatives of D,L-glutamic acid and D,L-aspartic acid are described having the formulae: ##STR1## in which n is equal to 1 or 2, R 1 is a phenyl group mono-, di- or tri-substituted with...
4771055 7-[[3-(aminomethyl)-3-alkyl]-1-pyrrolidinyl]-quinoline-carboxylic acids  
Novel, orally active antibacterial agents are described and characterized as 7-[[3-(aminomethyl)-3-alkyl]-1-pyrrolidinyl]-6-fluoro-1,4-di hydro-4-oxo -3-quinoline carboxylic acids or corresponding...
4762840 Pyrimido[2,1-b]benzothiazoles having antiallergic activity  
Novel pyrimido[2,1-b]benzothiazoles of the formula ##STR1## wherein R and R 3 are individually selected from the group consisting of hydrogen and alkyl of 1 to 6 carbon atoms or taken together...
4760183 Process for the preparation of aromatic dialkylamines  
A process for the preparation of aromatic dialkylamines of the formula (1) ##STR1## in which R denotes an alkyl-C 1 -C 6 group, X and Y each denote a hydrogen, fluorine or chlorine atom or a...
4721797 Process for the preparation of N-acyl-N-alkyl-2,6-dialkyl-3-chloroanilines  
N-acyl-N-alkyl-2,6-dialkyl-3-chloroanilines of the formula ##STR1## wherein R 1 is methyl or ethyl, R 2 is alkoxymethyl, chloromethyl or 2-tetrahydrofuryl, R 3 is alkoxymethyl, carboxy or...
4699927 Anticonvulsant valproic acid salts  
Water-soluble valproic acid salts, consisting of reaction products of valproic acid with at least one basic amino-acid, the latter being preferably selected from the group comprising arginine,...
4696910 Catalyst element, a process for the preparation thereof as well as a use thereof  
A catalyst element is described which is intended for use in a reactor for a chemical reaction where a lyophobic fluid is contacted with a lyophilic fluid for a reaction in the presence of catalyst...
4663465 Preparation of 2,2-dimethyl-3-aryl-cyclopropanecarboxylic acid and esters and new intermediates therefor  
2,2-Dimethyl-3-arylcyclopropanecarboxylic acids and esters, suitable as insecticide intermediates, of the formula ##STR1## in which Ar is naphthyl or substituted furyl, thienyl or phenyl, and R...
4656170 N-[4-[2-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)ethenyl] phenyl]acetamide and related compounds  
The present invention relates to N-[4-[2-(1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl)eth enyl]phenyl]ac etamide and their derivative compounds which have valuable pharmacological properties...
4654342 6-(cyanoguanidinophenyl)pyridazinones as cardiac stimulants  
This invention relates to cyanoguanidine derivatives that have utility in the treatment of congestive heart failure. A specific compound of this invention is 6-[4-(N 3 -methyl-N 2 ...
4652635 Method for converting ether groups to hydroxyl groups and ester groups to acid groups  
A method for converting ether groups such as alkyl or aryl ether groups including hydroquinone ether groups to hydroxyl groups and ester groups such as alkyl or aryl ester groups to carboxylic acid...
4645842 Pyrrole compounds for detecting the presence of hydrolytic analytes  
A novel compound useful in detecting leukocytes, esterase and protease in a test sample. The compound has the structure ##STR1## in which: A is an acid residue, R is lower alkyl, aryl, carboxyl,...
4644067 Process for the extraction of amino acids from an aqueous phase  
A process for the extraction of aromatic (e.g., phenyl-containing) amino acids from an aqueous phase (solution) containing them, comprising combining the aqueous phase with a tenside of the formula...
4632785 Thermally activable trimerization catalyst  
Disclosed is a method for the trimerization of organic isocyanates comprising thermally activating, in the presence of said isocyanates, a catalyst comprising a carboxylic acid salt selected from...
4610819 Process for the preparation of aromatic-1,4-oxazepinones and thiones  
A process for the preparation of 1,4-oxazepinones and thiones having the formula: ##STR1## wherein A is an aromatic ring selected from benzene, naphthalene, quinoline or pyridine; n is 1 to 3; Z is...
4587025 Zwitterionic quaternary ammonium carboxylates, their metal salts and lubricants containing same  
Hydrocarbyl ammonium hydrocarbyl carboxylate internal salts and their metal-containing derivatives are made by reacting certain amines with certain organic acids to obtain the former and reacting...
4577025 Method of preparing α-aromatic propionic acids and intermediates thereof  
A method for the preparation of an ester of α-thio-α-aromatic propionic acid derivatives of the formula: ##STR1## wherein R 1 is alkyl, phenyl or benzothiazolyl, R 2 is alkyl and Ar is an...
4556739 3,4-Dialkoxy-2-alkylcarbonyl analino compounds  
A process for preparing 4-alkyl-2(1H)quinazolinone-1-alkanoic acid derivatives is described. The 4-alkyl-2(1H)quinazolinones are useful as cardiovascular agents.
4555570 Substituted 4-alkyl-2-(1H) quinazolinone-1-alkanoic acid derivatives  
A process for preparing 4-alkyl-2-(1H) quinazolinone-1-alkanoic acid derivatives is described. The 4-alkyl-2-(1H) quinazolinones are useful as cardiovascular agents.
4544765 Chloramphenicol derivatives  
Chloramphenicol derivatives are provided for use in the preparing of antigen conjugates for the production of antibodies specifically for chloramphenicol. Specifically, the aryl amino group is...
4525294 Amino acid mixtures, their alkali metal salts and process for preparing same  
The present invention relates to the preparation of mixtures of sterically hindered substituted N-secondary amino acids or their alkali metal salts by a one-step reductive condensation of an amino...
4518612 Naphthalene and 2-oxo-benzopyran acids and derivatives and pharamaceutical use thereof  
There are described compounds of formula I, ##STR1## in which Ra, Rb, Rc, Rd, Re, Rf and Rg, which may be the same or different, each represent hydrogen, amino, hydroxy, alkoxy, alkenyloxy,...
4517130 Substituted amino acid process  
An improved process for preparing substituted amino acids and lower alkyl esters thereof, and intermediates therefor, comprising reacting a substituted aniline, HCN and an aldehyde to form a...
4447428 Prostanoid compounds and pharmaceutical compositions  
Prostanoid compounds are described having the formula: ##STR1## where A is a cyclopentane ring, which is substituted by oxo and/or hydroxy or etherified hydroxy and may be saturated or unsaturated;...
4442117 Homoserine derivatives and their use as microbicides  
There are described novel homoserine derivatives of the formula (I) ##STR1## which possess valuable microbicidal properties. In the formula: Ar is substituted phenyl or naphthyl; R 1 is C 2 -C 6 ...
4440936 Rhodium-phosphine chiral hydrogenation catalysis of acetophenone, atropic acid, and alpha-acylamidoacrylic acids and esters thereof  
The chiral phosphine ligand (R)-1,2-bis(diphenylphosphino)-1-cyclohexylethane, when complexed to Rh(I), functions as a superior chiral hydrogenation catalyst. The chiral phosphine ligand is more...
4440940 Anti-atherosclerotic agents  
This disclosure describes 2- or 3-[(unsaturated or cyclopropylated alkyl)amino]phenyl compounds and derivatives useful as hypolipidemic and antiatherosclerotic agents.
4440785 Methods of using 2-aminobiphenylacetic acids, esters, and metal salts thereof to treat inflammation  
Novel 2-aminobiphenylacetic acids, esters and metal salts of the formula are disclosed: ##STR1## wherein R represents hydrogen, lower alkyl, sodium or potassium; R 1 represents fluoro, chloro,...
4431442 2-Methylenesuccinamic acid compounds as plant growth regulants  
2-Methylenesuccinamic acid compounds are useful plant growth regulants, e.g., are useful in regulating the growth of soya crops.
4424396 Process for the preparation substituted anilino acids  
Anilino acids of the formula ##STR1## wherein R is H or a metal cation; R 2 is hydrogen or lower alkyl of 1 to 5 carbon atoms, lower alkenyl of 2 to 5 carbon atoms, lower haloalkyl of 1-4 carbon...
4421739 Benzylidene-camphors, processes for their preparation and cosmetic compositions containing them  
The invention provides compounds which are particularly valuable for use as the active ingredient in sun tan lotions and creams and the like. These compounds have the general formula: ##STR1## in...
4421694 Process for the preparation of nitroanilines  
The invention relates to a process for the preparation of nitroanilines by the reaction of chloronitrobenzenes with ammonia at elevated temperature and under elevated pressure, and in the presence...
4421929 Tetracarboxylic acids  
Novel tetracarboxylic acids are described of the formula ##STR1## wherein Ar, R 1 and R 2 are named substituents, and both n's are zeros or ones.
4418181 Polyimides having bis-maleimide terminal groups  
The compositions described herein comprise polyimides having bis-maleimide terminal groups and having the formula: ##STR1## wherein Q is a trivalent aromatic radical, Ar is a divalent aromatic...
4407823 Novel phenylacetic acid derivatives  
Phenylacetic acid derivatives of the formula ##STR1## wherein n is an integer of 2 to 5; ##STR2## R 1 is hydrogen, halogen, trifluoromethyl, nitro or amino; R 2 and R 3 each independently is...
4390714 Tertiary aromatic amine accelerators in acrylic resin  
Tertiary aromatic amines derived from aminoglutethimide or para-aminophenylacetic acid act as accelerators for the peroxide catalyzed polymerization of acrylic resins, especially methacrylates,...
4371706 Preparation of alkali metal aminoalkanoates  
Alkali metal aminoalkanoate is prepared by contacting in the presence of an alkali metal carboxylate a reaction mixture in which there is at least one alkali metal hydroxide, at least one lactam,...
Matches 201 - 250 out of 385 < 1 2 3 4 5 6 7 8 >