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| Number | Title | Issue Date |
| 7018430 | Method of mass-coloring synthetic materials The present invention relates to a method of mass-coloring synthetic materials, which comprises using at least one pigment dye of formula (1) wherein R and R1 together form a phenyl or heteroaryl radical and R2 is hydrogen, or R1 and... | 03/28/2006 |
| 6627758 | Compositions and methods for hydration of terminal alkynes Compositions and methods are described for hydrating terminal alkynes catalytically in anti-Markovnikov fashion. The compositions comprise a transition metal complex including at least one organic ligand having at least two heteroatoms, wherein the hetero... | 09/30/2003 |
| 6534434 | Chiral imidazolidinone-based catalyst composition and reaction system Acid addition salts of imidazolidinones are provided as catalysts for transforming a functional group within a first reactant by reaction with a second reactant. Exemplary first reactants are ,ଲ-unsaturated carbonyl compounds such as ,... | 03/18/2003 |
| 6307057 | Acid addition salts of imidazolidinones as reaction catalysts Acid addition salts of imidazolidinones are provided as catalysts for transforming a functional group within a first reactant by reaction with a second reactant. Exemplary first reactants are ,ଲ-unsaturated carbonyl compounds such as ,... | 10/23/2001 |
| 6103898 | Preparation of cyclic urea derivatives Cyclic urea derivatives of the formula I ##STR1## in which X, X', Y, Y' and Z can have various meanings, are prepared by a) reacting a urea derivative of the formula II ##STR2## with a diketone of the formula III ##STR3## and b) hydrog... | 08/15/2000 |
| 6037474 | Process for the preparation of cyclic 4-oxoamidines The present invention relates to a process for the preparation of cyclic 4-oxoamidines. Such substances are precursors of active substances having biological action. The process according to the invention forms a further method of obtaining this class of ... | 03/14/2000 |
| 6018051 | Processing for washing-out degradation-resistant organic chlorine compound In order to subject a cellulosic material such as insulating paper onto and into which transformer high-voltage insulating oil containing PCB has adhered and permeated to washing that removes the PCB etc. to an undetectable value, the cellulosic material ... | 01/25/2000 |
| 5977377 | Process for producing N-alkylimidazole Disclosed is a process for producing an N-alkylimidazole which comprises reacting an imidazole with an N-alkylating agent in an organic solvent in the presence of alkali particles having a specific surface area of 0.6 M2 /g or larger.... | 11/02/1999 |
| 5783706 | Process for the preparation of 1,3-disubstituted imidazolidinones 2-Imidazolidinones are prepared by reacting 1,3-dioxalan-2-one (ethylene carbonate) with at least one compound of the formula RNH2 where R can be, inter alia, H, alkyl, aryl, heteroalkyl or heteroaryl.... | 07/21/1998 |
| 5756527 | Imidazole derivatives useful as modulators of multi drug resistances The present invention relates to imidazole derivatives having formula 1 ##STR1## wherein: R1 is selected from the group consisting of: mono-,di-,and tri-substituted phenyl or thienyl, the substituents are selected from the group consisting... | 05/26/1998 |
| 5708171 | Imidazole derivatives for pharmaceutical use A compound selected from the group consisting of a compound of the formula ##STR1## having antagonist properties to histamine H3 -receptors.... | 01/13/1998 |
| 5648499 | Method of decomposing halogenated aromatic compounds A safe and reliable method of decomposing halogenated aromatic compounds, wherein a heat-resistant alkaline polar solvent containing halogenated aromatic compounds is contacted with a alkali at a temperature ranging from about 100° C. to 300° C. in orde... | 07/15/1997 |
| 5583256 | Process for producing 1,3-dialkyl-2-imidazolidinone A novel bis-urea compound, preparation process of the compound, and preparation process of 1,3-dialkyl-2-imidazolidinone are disclosed and the disclosure provides a novel preparation process of 1,3-dialkyl-2-imidazolidinone and simultaneously enables effe... | 12/10/1996 |
| 5559113 | Imidazole compounds and their therapeutic applications A compound selected from the group consisting of a compound of the formula ##STR1## wherein the substituents are defined as in the specification having antagonist properties to histamine H3 -receptors.... | 09/24/1996 |
| 5508425 | Process for producing 2-substituted 5-chlorimidazoles The 2-substituted 5-chlorimidazoles of general formula: ##STR1## are new intermediate products for the production of antihypertensive pharmaceutical agents or of herbicidal compounds. A process for the production of these intermediate products as wel... | 04/16/1996 |
| 5321039 | Method of inducing a histamine agonist action on H2 receptors The invention claims as drugs which are active as agonists of the histamine H3 receptor, the O-[2-(4(5-imidazolyl)-ethyl] isothiourea, 4-(4(5)-imidazolyl) butyramidine and S-[2-(4(5)-imidazolyl)-ethyl] isourea as well as their N-methyl derivati... | 06/14/1994 |
| 4973592 | 1,3-diazocycloalkenes as muscarinic receptor blocking agents New pharmacologically active heterocyclic derivatives as muscarinic receptor blocking agents, useful for the treatment of gastrointestinal disorders, of the following formula ##STR1## wherein the substituents are defined hereinbelow.... | 11/27/1990 |
| 4918186 | Process for producing cyclic ureas A process for producing a cyclic urea is provided. The process comprises reacting a diamine expressed by the formula (II) R-HN-R'-NH-R (II) wherein R represents hydrogen atom or a lower alkyl group and R' represent ... | 04/17/1990 |
| 4888348 | Substituted thioureas, isothioureas and carbodiimides The invention relates to novel substituted phenylthioureas, phenylisothioureas and phenylcarbodiimides of formula I ##STR1## wherein Z is ##STR2## or --N.dbd.C.dbd.N--; R1 is C1 -C12 alkyl, C3 -C... | 12/19/1989 |
| 4459411 | Preparation of unsaturated heterocyclic carbonyl-containing compounds Unsaturated heterocyclic carbonyl-containing compounds, e.g., 2H-imidazol-2-ones, 2(3H)-oxazolones and 2H,3H-pyrrol-2-ones, are prepared by the anodic oxidation of saturated heterocyclic carbonyl-containing precursors of the above compounds in a C1-4... | 07/10/1984 |
| 4405794 | Preparation of 2-oxazolidinone and ethyleneurea The present invention provides a method for reacting urea and beta-hydroxyethylcarbamate to make 2-oxazolidinone and ethyleneurea in a good yield and high selectivity, whereby the reaction method can be controlled to provide either the 2-oxazolidinone or ... | 09/20/1983 |
| 4341746 | Removal of degradation product from gas treating solution A method for separating a cyclic urea degradation product from a solution, such as a scrubbing solution comprising n-cyclohexyl-1,3-propane diamine, an alkali metal carbonate and cyclic urea, is disclosed. The solution is passed to a vacuum crystallizatio... | 07/27/1982 |
| 4332586 | Novel reactants for crosslinking textile fabrics Alkylated glyoxal/cyclic urea condensates are excellent formaldehyde-free crosslinking resins for textile fabrics.... | 06/01/1982 |
| 4284758 | Glyoxal/cyclic urea condensates Alkylated glyoxal/cyclic urea condensates are excellent formaldehyde-free crosslinking resins for textile fabrics.... | 08/18/1981 |
| 4272455 | Production of monoalkyleneglycols, monoalkanolamines and alkylenediamine A method for the formation of monoalkyleneglycols, monoalkanolamines and alkylenediamines, comprising the steps of: (a) reacting ammonia or ammonium carbonate with an alkylenecarbonate to form a carbamate, (b) heating the carbamate to form a monoalkyleneg... | 06/09/1981 |
| 4154931 | Process for the preparation of cyclic ureas A novel process is disclosed for the preparation of cyclic ureas having the formula ##STR1## wherein A is a straight chain alkylene radical of 2 to 4 carbon atoms, inclusive, wherein said alkylene radical can be substituted by at least one membe... | 05/15/1979 |
| 4063021 | Method for the synthesis of ureas A method for the preparation of a group of variously substituted ureas is disclosed, these compounds being obtained by the pyrolytic decomposition of the alkali metal or alkaline earth metal carbamates corresponding to the expected ureas, the reaction tak... | 12/13/1977 |
