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| Number | Title | Issue Date |
| 7301049 | Photolabile esters and their uses Compounds which are capable of generating acid on photolysis are disclosed, and the uses of these compounds, especially for deprotecting the termini of nucleic acid molecules or peptides during synthesis of arrays. The compounds described herein may be employed in t... | 11/27/2007 |
| 7291184 | Method of reducing the organic carbon content of production waste water in the course of the preparation of concentrated solutions of anionic organic compounds The present invention relates to a method of reducing the total organic carbon (TOC) content of waste water in the course of the preparation of concentrated solutions or suspensions of anionic organic compounds, which method comprises increasing the concentration of... | 11/06/2007 |
| 7060858 | Method for manufacturing sulfonium salts It is an object of the invention to provide a method which makes it possible to manufacture the desired sulfonium salts directly without using a metathesis process and without using acids in large excess amounts. An aryl compound (A) in which a hydrogen atom is bond... | 06/13/2006 |
| 7025318 | Container support A container (10) having a plurality of panels (12–18) joined together to form a sleeve (64). The panels (12–18) each have an end edge that cooperate to define an imaginary plane (P) at one end of the sleeve (64). The container ... | 04/11/2006 |
| 6974881 | Production method of 4,6-diaminoresorcin The present invention relates to a novel production method of 4,6-diaminoresorcin, and to 2-sulfonic acid-4,6-dinitroresorcin as its intermediate and salts thereof. The target compound is obtained by (R1) sulfonating resorcin (A) to obtain resorcin 2,4,6-trisulfonat... | 12/13/2005 |
| 6191263 | Crystal modification of C.I. Pigment Red 53:2 (γ-phase) The invention relates to a novel crystal modification (γ-modification ) of C.I. Pigment Red 53:2 of the formula (1) ##STR1## having the following characteristic reflections in the X-ray powder diffraction pattern: 2.THETA. d R... | 02/20/2001 |
| 5962730 | Aromatic sulphonyl compounds having an additional thioether, sulphoxide or sulphonyl group Sulfonyl compounds have the formula ##STR1## where n is 0, 1 or 2, Y is vinyl or a radical of the formula C2 H4 Q, where Q is hydroxyl or an alkali-detachable group, E is C3 -C6 -alkylene with or without interru... | 10/05/1999 |
| 5929270 | Process for preparing distyrylbiphenyl compounds A process is provided for the production of compounds having the formula: ##STR1## in which R is hydrogen, C1 -C5 alkyl, cyano or halogen; M is hydrogen or a salt-forming colorless cation; and n is 2; which process comprises reductiv... | 07/27/1999 |
| 5892105 | Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid A process for preparing amine salts of 4-nitrotoluene-2-sulfonic acid by sulfonation of nitrotoluene with oleum, subsequent dilution of the reaction mixture with water and extraction with lipophilic amines, wherein the acidic aqueous solution of the sulfo... | 04/06/1999 |
| 5837761 | Pigmented plastics compositions A plastics composition comprising a high molecular weight material and an effective coloring amount of an azo pigment of formula ##STR1## where M is Mg, Ca, Sr, Ba or Mn or a mixture of two or more thereof, R1 and R2 are chlorin... | 11/17/1998 |
| 5739382 | Derivatives of 2-aminobenzenesulphonic acid and of 2-aminobenzenesulphonyl chloride, their preparation and their use as synthetic intermediates The present invention provides a compound of formula (1) ##STR1## in which: R4 represents a hydrogen atom, a halogen atom or a nitro group; R6 represents a hydrogen atom or a straight or branched (C1 -C6)al... | 04/14/1998 |
| 5714509 | Inhibitors of bacterial sialidase and methods of making and using the same A sialidase inhibitor of the shown formula I: ##STR1## where dashed lines d1 and d2, X1, R1, R2, R6, R3, R4 and R5 are as described in the specificatio... | 02/03/1998 |
| 5659074 | Herbicide intermediates Compounds of the formula: ##STR1## wherein R is CH2 X or CHX2 and X is chloro or bromo and R1 is chloro, bromo or nitro which are useful as intermediates for preparing herbicidal 2-(2'-substituted)-4'-(alkylsulfo... | 08/19/1997 |
| 5451699 | Process for the preparation of crystalline, salt-free, chlorine-substituted 3-nitrobenzenesulfonic acid hydrates The present invention relates to a process for the preparation of crystalline, salt-free, chlorine-substituted 3-nitrobenzenesulfonic acid hydrates from sulfonation mixtures containing chlorine-substituted 3-nitrobenzenesulfonic acid, in which the sulfona... | 09/19/1995 |
| 5315036 | Process for the preparation of 2-aminobenzene-1,4-disulphonic acids and the new compound 6-chloro-2-aminobenzene-1,4-disulphonic acid The present invention relates to an improved preparation process for 2-aminobenzene-1,4-disulphonic acids and the new compound 6-chloro-2-aminobenzene-1,4-disulphonic acid.... | 05/24/1994 |
| 5292932 | Process for the preparation of 5-chloro-2-hydroxy-4-alkyl-benzenesulfonic acids Process for the preparation of compounds of the formula (1) ##STR1## in which R is an alkyl (C1 -C6) group and X is a hydrogen or alkali metal atom, in which compounds of the formula (2) ##STR2## in which R and X have the a... | 03/08/1994 |
| 5260431 | Nitroanilinesulfonic acids and the preparation of phenylenediaminesulfonic acids Nitroanilinesulfonic acids of the formula ##STR1## where R is C1 -C4 -alkyl are prepared by sulfonation of 3-nitro-N-alkylanilines using oleum, and are reduced to 3-(N-alkylamino)aniline-4-sulfonic acids.... | 11/09/1993 |
| 5231183 | Process for producing enyne derivatives A process for producing an enyne derivative, and intermediate, which is useful for preparing compounds showing strong inhibiting activities against squalane.epoxidase of Eumycetes and strong anti-cholesterol activities. The process comprises reacting a co... | 07/27/1993 |
| 5206427 | Process for the preparation of aromatic (di)chlorosulphonic acids and (di)bromosulphonic acids Aromatic (di)chlorosulphonic acids and (di)bromosulphonic acids can be prepared by reacting aromatic sulphonic acids with chlorine or bromine respectively, the reaction advantageously being carried out in the melt of the aromatic sulphonic acids.... | 04/27/1993 |
| 5196573 | Process for the preparation of sulfonated anthranilic acids A process for the preparation of 4-sulfonated anthranilic acids by sulfonation of ortho-nitrotoluenes with chlorosulfonic acid or oleum followed by oxidation of the methyl group and, finally, reduction of the nitro group.... | 03/23/1993 |
| 5189206 | Process for the preparation of aminobenzenesulfonic acids There is disclosed a process for the preparation of compounds of formula ##STR1## wherein the symbols are as defined in claim 1, which process comprises dissolving a compound of formula ##STR2## in sulfuric acid, adding this solution to oleum an... | 02/23/1993 |
| 5130454 | Polytetrahydrofuran derivatives having terminal aromatic groups Polytetrahydrofuran derivatives of the general formula ##STR1## where n is from 2 to 70, X is the bridge member --NH-- or --O-- and R1 and R4 are each hydrogen or various radicals.... | 07/14/1992 |
| 5105012 | Catalytic reduction of dinitrobenzenes using a noble metal catalyst and iron or iron salts There is provided an improved process for the reduction of optionally substituted dinitrobenzenes to the corresponding nitroanilines with high yields which comprises contacting the dinitrobenzene with hydrogen in an acidic medium in the presence of a cata... | 04/14/1992 |
| 4968835 | Process for the preparation of aminoaryl-sulphonic acids Aminoaryl-sulphonic acids can be prepared by reaction of arylamines and sulphuric acid at elevated temperature and under pressure, where water formed and, where appropriate, water present as water of dilution, is left in the reaction mixture until the end... | 11/06/1990 |
| 4834920 | New quaternary ammonium salts New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.... | 05/30/1989 |
| 4808342 | Production of sulfonated amines A process for the preparation of sulfonated aromatic amines is disclosed based upon starting with the corresponding amine reacted with sulfuric acid in the presence of a sufficient excess of sulfuric acid to act as the reaction solvent. The sulfuric acid ... | 02/28/1989 |
| 4806283 | Quaternary ammonium salts New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.... | 02/21/1989 |
| 4806284 | New quaternary ammonium salts New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure. ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.... | 02/21/1989 |
| 4803017 | Quaternary ammonium salts New quaternary ammonium salts are provided having advantageous utility as charge agents in electrostatographic toners and developers. The salts have the structure ##STR1## wherein R is alkyl having 12 to 18 carbon atoms.... | 02/07/1989 |
| 4600797 | Process for the preparation of nitroaminobenzenes Process for the preparation of a nitroaminobenzene by nitrating an aminobenzene which is protected at the nitrogen wherein the nitration is carried out by the simultaneous combination of nitric acid and the aminobenzene to be nitrated, in the presence of ... | 07/15/1986 |
| 4560745 | Preparation of dyes which contain sulfonic acid groups and have a low electrolyte content A process for the preparation of dyes which contain sulfonic acid groups and have a low electrolyte content, wherein an aqueous solution or suspension, which may or may not contain inorganic salts, of the dye containing sulfonic acid groups is (a) mixed w... | 12/24/1985 |
| 4548761 | Process for the preparation of 1-aminobenzene-2-sulphonic acids Process for the preparation of 1-aminobenzene-2-sulphonic acids of the formula ##STR1## wherein R.dbd.H or a substituent and n=1-4, and their salts, in particular their alkali metal salts, by oxidation of compounds of the formula ##STR2## w... | 10/22/1985 |
| 4451408 | Process of preparing sulfonium organosulfonates Monomeric and polymeric triarylsulfonium complex salts which may be prepared by contacting diarylsulfoxides or polymeric arylsulfoxides with aromatic compounds in the presence of an organosulfonic acid are described. An example is tris-(4-phenoxyphenyl)su... | 05/29/1984 |
| 4427600 | Preparation of 1-alkyl-2-chloro-5-nitrobenzene-4-sulfonic acids A process for the preparation of compounds of the formula I ##STR1## where R is alkyl, by sulfonation, chlorination and nitration starting from an alkylbenzene, wherein the alkylbenzene is sulfonated with from 2.5 to 3, preferably from 2.65 to 2.75, ... | 01/24/1984 |
| 4382039 | Process for the preparation of 4-nitrotoluene-2-sulphonic acid In a process for the preparation of 4-nitrotoluene-2-sulphonic acid by reacting 4-nitrotoluene with gaseous sulphur trioxide at an elevated temperature, the improvement wherein molten 4-nitrotoluene is reacted with gaseous sulphur trioxide at a temperatur... | 05/03/1983 |
| 4328244 | Novel (((substituted-phenyl)methyl)amino)benzenesulfonic acids and pharmaceutically-acceptable salts thereof Novel (((substituted-phenyl)methyl)amino)benzenesulfonic acids having antiviral activity are disclosed. Compounds within the scope of the invention have the formula ##STR1## wherein R1 represents lower alkyl, lower alkoxy, nitro, amino, cy... | 05/04/1982 |
| 4310331 | Process for the preparation of the dyestuff direct yellow 11 in the form of concentrated stable solutions, the solutions obtained and their applications The invention relates to a process for the preparation of the dyestuff Direct Yellow 11 directly in the form of stable concentrated solutions, in which caustic soda in aqueous solution is reacted, at a temperature from 40° to 90° C., with a solution con... | 01/12/1982 |
| 4277492 | Novel 4-bis((Phenylmethyl)amino)-benzenesulfonic acids possessing antiviral activity Novel 4-bis((phenylmethyl)amino)benzenesulfonic acids and their pharmaceutically-acceptable salts are described. The compounds exhibit antiviral activity. Methods of using the compounds as antiviral agents are disclosed and also pharmaceutically-acceptabl... | 07/07/1981 |
| 4261916 | Sulph(on)ation process An orifice plate mixer for mixing 2 fluids has an axial orifice perpendicular to the plate through which bore a first fluid passes and a port in the internal wall of the orifice through which the second fluid passes. The mixer can impart high turbulence t... | 04/14/1981 |
| 4250327 | Polymeric yellow colorant A group of water-soluble polymeric yellow colors and their preparation is disclosed. These colors comprise a plurality of units of a chromophore of the formula ##STR1## wherein M+ is a pharmaceutically acceptable monovalent cation att... | 02/10/1981 |
