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| Number | Title | Issue Date |
| 7083705 | Process for producing a fluorine-containing compound by liquid phase fluorination The invention provides a process for producing a fluorine-containing compound from an inexpensive material. Namely, Compound I such as RACH2OH is reacted with Compound II such as XCORB to form Compound III such as RA | 08/01/2006 |
| 5994110 | Methods for direct synthesis of compounds having complementary structure to a desired molecular entity and use thereof Compounds which possess a complementary structure to a desired molecule, such as a biomolecule, in particular polymeric or oligomeric compounds, which are useful as in vivo or in vitro diagnostic and therapeutic agents are provided. Also, various methods ... | 11/30/1999 |
| 5919341 | Difluorochloracetyl, dichloracetyl and trichloracetyl chloride preparation A process for preparing chlorodifluoroacetyl chloride from 1,1-difluoro-2,2-dichloroethylene and dichloroacetyl chloride from trichloroethylene or 1,1,2,2-tetrachloroethane, in which the starting compounds are continuously reacted in the gaseous phase wit... | 07/06/1999 |
| 5736012 | Process for the preparation of a fluorinated acid A process for the preparation of a fluorinated acid such as trifluoroacetic acid, including admixing an hydrofluorocarbon, such as 1,1,1-trifluoroethane, with chlorine, an oxidizing agent and an additive to prevent or minimize decomposition; and irradiati... | 04/07/1998 |
| 5663543 | Method for producing a polyfluoropropionyl halide A method for producing a polyfluoropropionyl halide, which is characterized by oxidizing at least one dichloropentafluoropropane selected from 3,3-dichloro-1,1,1,2,2-pentafluoropropane and 1,3-dichloro-1,1,2,2,3-pentafluoropropane by oxygen under irradiat... | 09/02/1997 |
| 5619023 | Process for the preparation of alkyl halodifluoroacetates For the preparation of alkyl halodifluoroacetates, a 1,1-difluorotetrahaloethane is reacted with an alcohol in the presence of air and/or oxygen and a free-radical initiator, such as for example an azo compound, e.g., azobis(isobutyronitrile).... | 04/08/1997 |
| 5545298 | Process for preparing polyfluorocarboxylic acid chlorides and perfluorocarboxylic acid chlorides A process for preparing compounds corresponding to the formula RCFXC(O)Cl, in which X is fluorine or chlorine and R is fluorine or a perfluorinated C1- C10-alkyl group, preferably chlorodifluoroacetyl chloride, by photochemical oxidation of R122 (CF2... | 08/13/1996 |
| 5453161 | Polyamic acid to polyimide conversion by microwave heating An intermolecular and/or intramolecular non-foamed polyimide is prepared by heating an aromatic tetracarboxylic acid or dianhydride thereof and an aromatic diamine thereby preparing a polyamic acid, and then subjecting the polyamic acid in the solid phase... | 09/26/1995 |
| 5433831 | Process for the preparation of dichloroacetyl chloride The invention relates to a process for the preparation of dichloroacetyl chloride by oxidation of trichloroethylene under pressure and at elevated temperature in the presence of a certain secondary aliphatic or cycloaliphatic amine of the formula HNR... | 07/18/1995 |
| 5378333 | Halogenated polycarboxycubanes The disclosure describes photochemical synthesis of halogenated polycarboxycubanes from simple carboxycubanes and an oxalyl halide. It is possible to synthesize 6-Chloro-1,2,4,7-tetracarbomethoxycubane and 2-Chloro-1,3,5,7-tetracarbomethoxycubane. Photoch... | 01/03/1995 |
| 5233054 | Process for the preparation of halophthalic anhydrides Halophthalic anhydrides are prepared by the liquid phase reaction of a brominating agent with halogen substituted hexa- or tetra-hydrophthalic anhydrides.... | 08/03/1993 |
| 5153352 | Process for preparation of intermediates of carbocyclic nucleoside analogs A compound of the formula: ##STR1## wherein A is a purin-9-yl group, a heterocyclic isostere of a purin-9-yl group, a pyrimidin-1-yl group or a heterocyclic isostere of a pyrimidin-1-yl group; E is hydrogen, --CH2 OH or --OH; and G and D ... | 10/06/1992 |
| 4908111 | Process for the preparation of 7-(2-diethylaminoethyl)-theophylline acetyl salicylate and use thereof A process for the preparation of 7-(2-diethylaminoethyl)-theophylline acetylsalicylate and use of the product obtained. The process comprises prior filtering of a solution of the reactants through a layer of diatomaceous earth and activated carbon, coolin... | 03/13/1990 |
| 4906343 | Process for the photochemical production of -aryl propionic acid The invention resides in a novel photochemical process for the production of -aryl propionic acids by the subjection of a solution in an organic solvent of the corresponding -haloaryl alkyl ketones to irradiation with light having a waveleng... | 03/06/1990 |
| 4898655 | Method for racemization of optically active chrysanthemic acid or its derivatives Optically active chrysanthemic acid or its derivatives of the formula ##STR1## (wherein X represents a hydroxyl group, a halogen atom, a C1-20 alkoxy group or a 2,2-dimethyl-3-isobutenyl-cyclopropane carboxyl group and * mark shows asymmet... | 02/06/1990 |
| 4855025 | Polyfluoro compounds and method for preparing them This invention relates to compounds which simultaneously contain a perfluorinated chain and a hydrogenated chain and which correspond to the general formula: ##STR1## in which RF is a perfluoroalkyl radical, m an integer from 0 to 2, ... | 08/08/1989 |
| 4689425 | Photochlorination of aromatic compounds in the side chain A process for photochlorinating aromatic compounds in the side chain and, in particular, a process for the selective chlorination of a 2-alkyl group of 2-alkyl benzoic acid or ester is disclosed. In this process, hydrogen chloride is added to the benzoic ... | 08/25/1987 |
| 4528146 | Process for the preparation of terephthaloyl and isophthaloyl dichlorides An improved process for the preparation of terephthaloyl and isophthaloyl dichlorides by chlorination of dimethyl terephthalate and isophthalate with chlorine gas at temperatures from 100°-250° C., optionally in the presence of light and/or catalysts pr... | 07/09/1985 |
| 4430181 | Process for the preparation of benzoyl chloride Benzoyl chloride is prepared by a process in which the high-boiling residue obtained in the catalytic oxidation of toluene with oxygen or oxygen-containing gases in the liquid phase is largely freed of heavy metal salts which are present, and is then chlo... | 02/07/1984 |
| 4374715 | Method for the preparation of poly (carbonoyl fluoride) oligomers An improved method for synthesizing poly (carbonyl fluoride) oligomers by using bis(trifluoromethyl)trioxide as a reaction initiator in the photo-oxidation of F-3 methylbutene-1.... | 02/22/1983 |
| 4371473 | Preparation of 2-(2-fluoro-4-biphenylyl)propionic acid and corresponding nitride 2-(2-fluoro-4-biphenylyl)propionic acid is prepared from 2-amino-4-methyl-biphenyl via a series of novel intermediates. In particular 2-amino-4-methylbiphenyl is converted to 2-fluoro-4-methylbiphenyl, the methyl group is brominated to form 2-fluoro-... | 02/01/1983 |
| 4351954 | Halogenated -amino acids Halogenated -amino acids as new compounds are obtained by subjecting halogenated ethanes and an ester of acrylic acid or crotonic acid to addition reaction, adding sodium azide to the adducts, reducing the resultant mixtures with hydrogen and subse... | 09/28/1982 |
| 4345090 | Process for preparing menthyl esters of enantiomers of chiral 3-(2,2-dichloro- and -dibromo-vinyl)-2,2-dimethylcyclopropanecarboxylic acids A substantially pure compound selected from the group consisting of the d-menthyl esters of 1RS-cis-, 1RS-cis/trans-, 1R-cis-, 1S-cis-, 1R-trans- and 1S-trans-3-(2,2-dichloro- and dibromo-vinyl)-2,2-dimethylcyclopropanecarboxylic acid, the 1-menthyl ... | 08/17/1982 |
| 4305889 | Process for producing , , -trifluoro-o-toluic fluoride ,,-trifluoro-o-toluic fluoride is produced in good yield and high purity by reacting anhydrous hydrogen fluoride with 1,1,3,3-tetrachloro-1,3-dihydroisobenzofuran or a mixture of ,,-trichloro-o-toluic chloride the... | 12/15/1981 |
| 4301092 | Preparation of oxalyl chloride Oxalyl chloride is prepared by (i) first esterifying ethylene glycol with trichloroacetyl chloride, (ii) next photochemically chlorinating the ester which results from the step (i), i.e., ethylene glycol bis-trichloroacetate, and (iii) then decomposing th... | 11/17/1981 |
| 4229592 | Intermediate for prostaglandins and process for preparing the intermediate The compound of the formula ##STR1## has been found to be an important and practical intermediate with the proper stereo-isomerism for the preparation of numerous prostaglandin derivatives. It can easily be converted to 4-acetoxy-2-cyclop... | 10/21/1980 |
| 4216153 | Method of preparing phthalide A method has been invented for the preparation of phthalide which comprises chlorinating o-toluic acid at 30°-260° C. and recovering the phthalide obtained.... | 08/05/1980 |
| 4124469 | Perfluoroalkylacetyl chloride process Perfluoroalkylacetyl chlorides of the formula ##STR1## wherein Rf represents a straight-chain perfluoroalkyl radical having from 4 to 12 carbon atoms which are prepared by reacting perfluoro alkyl ethanols having general formula wherein R | 11/07/1978 |
| 4123219 | Chemical storage of radiant energy A method for the chemical storage of radiant energy in which substituted naphthalenes undergo photochemical dimerization by exposure to radiant energy to form 1,2,2a,7,8,12b-hexahydro-1,8,2,7-ethanedihylidenedibenzo[a,e]cyclobuta[c]c yclooctenes, whic... | 10/31/1978 |
| 4072591 | Process for conversion of oligomers and higher polymers by irradiation with high-energy electrons Processes for the production of products containing fluorine-containing counds of lower molecular weight by irradiation with high-energy electrons of a dispersion of particles of solid polymers of tetrafluoroethylene and similar perfluoroolefins in an ol... | 02/07/1978 |
| 3996272 | Method for preparing pentachloroacetone and dichloroacetic acid from isopropyl ethers This invention relates to a chemical process for preparing pentachloro-2-propanone (pentachloroacetone) and dichloroacetic acid from isopropyl ethers which may be partially chlorinated. The pentachloroacetone process is carried out by reacting the isoprop... | 12/07/1976 |
| 3994675 | Chemical storage of radiant energy A system for the chemical storage of radiant energy in which either: A. 1,8-diaryl-1a,2,7,7a-tetrahydro-1,2,7-metheno-1H-cyclopropa[b]naphthalenes (1) are converted on heating to 1,2-diaryl-2a,8b-dihydrocyclobuta[a]naphthalenes (2) or 8,9-diaryl-benz... | 11/30/1976 |
| 3976678 | 2,3-Disubstituted levulinaldehydes Novel 2,3-disubstituted levulinaldehydes I are prepared in seven steps from readily available acrylates and acetoacetic esters. ##SPC1## They are useful intermediates in the preparation of prostaglandins.... | 08/24/1976 |
| 3956367 | 3-Fluoro-D-alanine and pharmacologically acceptable esters, and pharmacologically acceptable salts thereof 3-Fluoro-D-alanine, its pharmacologically acceptable esters, and pharmacologically acceptable salts of the foregoing, as well as other pharmacologically acceptable derivatives of 3-fluoro-D-alanine which, when administered clinically, are effective in rel... | 05/11/1976 |
