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6551467 |
Microwave facilitated allyllic substitution
The present invention is draw to microwave heating of a transition metal-catalysed organic reaction, in which a catalyst complex between a transition metal and an auxiliary ligand or ligands, the...
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6369231 |
Process for preparation of 2-chloropyridine
Described are processes for producing 2-chloropyridine by reacting pyridine with molecular chlorine in the vapor phase in the presence of a catalyst which includes an organic compound which...
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6348630 |
Method for purifying hexamethylenediamine in mixtures of hexamethylenediamine and an unsaturated cyclic imine
The level of an unsaturated cyclic imine (I) of the formula (I) where R 1 is alkenyl having 3, 4, 5, 6, 7, 8, 9, 10, 11 carbon atoms belonging to the ring system, in a mixture comprising...
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6328855 |
Method for producing (+)-exo-6-phenyl-3-azabicyclo-[3.2.0]heptanes
A process for preparing (+)-exo-6-phenyl-3-azabicyclo[3.2.0]heptanes of the formula I ##STR1## where R is hydrogen, chlorine, bromine, fluorine or methoxy, which comprises photocyclizing a...
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5904818 |
Process for the regeneration of an aqueous process liquid of the amine-oxide process
The invention is concerned with a process for the production of a solution of N-methylmorpholine-N-oxide in water, characterized by the following steps: (a) providing an aqueous solution...
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5536376 |
Method for production of 2-chloropyridine and 2,6-dichloropyridine
A method for producing 2-chloropyridine and 2,6-dichloropyridine by the steps of mixing vaporized chlorine and vaporized water to obtain dilute chlorine; introducing the dilute chlorine and...
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5486275 |
Nitrogen-containing perfluoroalkyl bromide and method for production thereof
A nitrogen-containing perfluoroalkyl bromide, a novel compound to the art, is represented by the formula, ##STR1## wherein Rf 1 and Rf 2 independently stand for a perfluoroalkyl group of one to...
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5484932 |
Halogenation processes in advantageous solvents, and novel bistrifluoromethyl-polyfluoroalkoxybenzenes
Compounds such as ##STR1## wherein R is F, CF 3 , CF 2 H, CHF CF 3 or CF 2 CF 3 , as well as related compounds containing chlorine, are used as solvents in halogenation processes.
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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...
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5439794 |
Mixed ligand complexes and uses thereof as binding agents to DNA
This invention concerns a coordination complex or salt thereof which is spectroscopically or photoactively determinable when bound to DNA having the formula ##STR1## wherein M is a suitable...
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5225562 |
Method of preparing (+)-deoxoartemisinin and selected analogues of (+)-deoxoartemisinin
This invention is a new method for preparing compounds useful as antimalarial agents having the formula; ##STR1## wherein R is hydrogen, a linear, branched or cyclo lower alkyl group having 1 to 8...
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5225556 |
Chemical probes for left-handed DNA and for A-DNA; chiral metal complexes as Z-specific antitumor agents and as double strand cleavers
This invention concerns a coordination complex and salts and optically resolved enantiomers thereof, of the formula (R) 3 --M, wherein R comprises 1,10-phenanthroline or a substituted derivative...
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5141608 |
Process of preparing 2-chloropyridine and/or 2,6-dichloropyridine
2-chloropyridine and/or 2,6-dichloropyridine are effectively produced by reacting pyridine with chlorine gas in the gaseous phase with irradiation of ultraviolet rays, while the reaction gas...
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5091535 |
Organic photochromic compound, a dimer of pyrido quinoline
An organic photochromic compound with improved long term preservability, thermal stability, the repetition character of the record and the like and useful as recording-memory materials or...
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4980475 |
Process for the preparation of N-10 alpha-methoxyl-lumilysergol and esters, thereof, and intermediates for their preparation
Processes for the preparation of esters of N 1 -methyl-10α-methoxylumilysergol are described, in which lysergol esters are subjected to N-methylation and subsequently to photochemical reaction...
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4977259 |
Process for preparing reactive stabilizing compound
Reactive stabilizing compounds, able to stabilize organic polymers, contain in their molecule a sterically hindered amino group and a hydrolyzable silyl function. In stabilizing organic polymers,...
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4976834 |
Asymmetric photochemical reaction process
An optically active substance having an optical purity of at least 50% e.e. is obtained by an asymmetric photochemical reaction by converting a starting, achiral material in a chiral crystalline...
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4957609 |
Process for preparing N-heterocyclic compounds
The invention relates to a process for the preparation of compounds of general formula (I) ##STR1## wherein R 1 represents a hydrogen atom or a C 1 -10 alkyl, C 3 -7 cycloalkyl, C 3 -7...
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4957608 |
Preparation of 8-bromomethyl-3-methylquinoline compounds
A process for the preparation of 8-bromomethyl-3-methylquinoline compounds of the formula I ##STR1## where one or both substituents X are chlorine and, where relevant, the other substituent X is...
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4940520 |
Process for the preparation of 4-acyloxyazetidin-2-one by singlet oxygen oxidation
The 4-acyloxyazetidin-2-ones, which are intermediates in the production of carbapenems and penems, are produced from 4-furanylazetidin-2-ones by singlet oxygen oxidation.
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4908442 |
Tetra ketone porphyrin monomers and the process of preparation thereof
The present invention relates to a tetraketone of the structure ##STR1## wherein M is a metal atom and R is selected from phenyl, alkyl substituted phenyl or halogen substituted phenyl. The process...
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4898654 |
Method of producing optically active β-lactam derivatives
Disclosed is a method of producing an optically active β-lactam derivative of the formula ##STR1## comprising irradiating with light, in solid phase, an inclusion complex of a compound of the...
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4891108 |
Process for preparing tetrahalopyridines
Symmetrical or 2,3,5,6-tetrahalopyridine is prepared by reacting 3,5-dihalopyridine in the liquid phase with chlorine or bromine while heating and irradiating the reactants with ultraviolet light....
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4888100 |
Photochemical conversion of cephalosporins, 1-carba(1-dethia)cephalosporins and 1-oxa(1-dethia)cephalosporins
A process for photochemically converting 3-exomethylene cephams (or 1-carba(1-dethia)cephams or and 1-oxa(1-dethia)cephams) from the corresponding 3-alkyl-3-cephem (or 1-carba(1-dethia)cephem or...
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4886735 |
Photopolymerizable recording materials and photoresist layers and lithographic printing plates based thereon
Photopolymerizable recording materials suitable for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable olefinically unsaturated organic...
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4870179 |
Process for preparing lysergol derivatives
A method of preparing lysergol derivatives, particularly 10α-methoxy lumilysergol, 1-methyl-10α-methoxy-lumilysergol and C8 esters of 1-methyl-10α-methoxy-lumilysergol, is provided characterized...
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4851094 |
Process for producing amidine sulfonic acid intermediates for guanidines
An efficient synthesis of quanidines, e.g. of the formula (III), by oxidizing a thiourea, e.g. of the following formula (II): ##STR1## with H 2 O 2 and a molybdenum catalyst to yield an...
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4820846 |
Triarylmethane compounds, their preparation and use as photoconductive systems
Compounds which are useful as sensitizers of photoconductors, having the general formula: ##STR1## in which: like symbols represent identical substituents, at least 4 of R 1 to R 9 represent...
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4754029 |
3-oxo-2-azabicyclohexane derivatives
3-Oxo-2-azabicyclohexane derivatives represented by the general formula: ##STR1## wherein R 1 represents an optically active menthoxy group or an optically active 1-phenylethoxy group when R 2 ...
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4668356 |
Photolytic process for the formation of carbon-containing free radicals and its applications to free radical polymerization in particular
Process for the formation of carbon-containing free radicals R., which optionally include functional groups, wherein thermal and/or photochemical energy is supplied to a thiocarbonyl-containing...
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4554007 |
Geometrical isomer of 1-substituted-1-triazolylstyrenes, and their production and use as fungicide, herbicide and/or plant growth regulant
The present invention relates to one of the two geometrical isomers (a compound defined as I-A isomer in the description below) of a triazole compound represented by the formula (I) or (II),...
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4545880 |
Photochemical process for preparing camptothecin derivatives
New Camptothecin derivatives possessing high anti-tumor activity with slight toxicity, represented by the general formula: ##STR1## wherein R 1 stands for a hydrogen atom, an alkyl group, a...
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4526986 |
Halomethyl, methyl maleic anhydride and synthesis of bromomethyl, methyl maleic anhydride
Quaternary ammonium compounds containing anhydride groups are prepared by halogenating dimethylmaleic anhydride and reacting the halogenated product with a tertiary amine. The products are useful...
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4492619 |
Photochemical process for preparing alkoxy substituted compounds
N-Chlorolactams, -amides, and -carbamates are photolyzed in alcoholic solution to provide N-(alpha-alkoxyalkyl)-substituted derivatives. These derivatives are interacted with hydroxylated acrylate...
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4483757 |
Photochemical process for preparing amines
Aliphatic, cycloaliphatic, heterocyclic aliphatic and aromatic amines are prepared in a liquid phase reaction under the influence of light energy in the presence of a specified ammonium halide...
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4472253 |
Process for the preparation of an N-substituted 3-O-alkyl-14-hydroxynormorphinone derivative
A 14-hydroxy group is introduced into a morphinan structure by singlet oxygen reaction with a novel dienol ester of an N-substituted-3-O-alkylnormorphinone. To carry out the singlet oxygen...
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4449516 |
Sunlight-energy-storing method
This invention is a method for storing light energy using an indigo derivative. Among indigo derivatives capable of storing light energy by the photoisomerization of the molecule from the...
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4429128 |
Carbapenams and carbapen-2-ems and process therefor
Carbapenam-3-carboxylic acids and carbapen-2-em-3-carboxylic acids substituted at the 1-position with an oxo, a hydroxy or an acetoxy group, variously substituted at the 2-position with such groups...
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4424805 |
Solar energy system and method of use
This invention relates to a solar energy system wherein chemical A is converted into chemical B in the presence of a photo-sensitizer with the absorption of considerable heat, which heat can be...
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4400249 |
Partial synthesis process for preparing (+) -vincamine and related indolic alkaloids
A process of partial synthesis of vincamine and related indolic alkaloids for use as the active principal ingredient in drugs for treatment of diseases of the circulatory system and the central...
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4394858 |
Photochemical conversion and storage of light energy by endoergic isomerizations
A process is provided for the capture and storage of radiant energy in highly strained carbon containing ring structures of isomerizable compounds. The process includes exposing a photocatalyst...
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4393214 |
Preparation of 2-chloro-5-trifluoromethylpyridine and 2-chloro-5-perchlorofluoromethylpyridines
2-chloro-5-trifluoromethylpyridine or a 2-chloro-5-perchlorofluoromethylpyridine is prepared by chlorination of 3-trifluoromethylpyridine or a 3-perchlorofluoromethylpyridine respectively in the...
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4389290 |
Use of electrocatalytic anodes in photolysis
A photolytic system comprised of a darkened halfcell and an illuminated halfcell in which oxidation and reduction reactions are made to occur. These halfcells are joined by an electrically...
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4369206 |
Ammonium salts of α-ketocarboxylic acids
This invention relates to new ammonium salts of α-ketocarboxylic acids, to their use for the production of amines in situ by photochemical decomposition and to photochemically hardenable coating...
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4364808 |
Photochemical preparation of silanes containing imide groups
The compounds according to the invention have the formula I ##STR1## in which R 1 , R 2 and R 3 are monovalent organic radicals or chlorine and Z is a tetravalent organic radical and A is a...
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4357307 |
Method of separating isotopes in which a compounding of selectivity is achieved by limiting the timing of the collection step
Methods for separating isotopes are disclosed including providing molecules which contain the element whose isotopes are to be separated and which have an isotopically shifted but overlapping...
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4349564 |
Use of 1,2-dimethyl-3-fluoro-, 1-methyl-3,3-difluoro-, and 1,2-dimethyl-3,3-difluoro-cyclobutane-1,2-dicarbonic acid 3,5-dichlorophenyl imides as plant fungicides
Cyclobutanecarboxylic acid imides of the formula I ##STR1## wherein one of R 1 and R 6 is hydrogen, methyl or ethyl, and the other is methyl or ethyl, R 2 and R 3 independently of one another...
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4348264 |
Photocatalyzed process for producing carbapenams and carbapen-2-ems
Carbapenam-3-carboxylic acids and carbapen-2-em-3-carboxylic acids substituted at the 1-position with an oxo, a hydroxy or an acetoxy group, variously substituted at the 2-position with such groups...
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4324627 |
Process for preparing 2-chloro-5-trichloromethylpyridine
Herbicidal 3- and/or 5-halogenomethyl-pyrid-2-yloxyphenoxy compounds and processes for making and using the same. Intermediates for making these compounds and their preparation are also disclosed....
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4298439 |
Producing long life disproportionation products from a photo redox agent useful as a reducing medium for water, and the like
The lifetime of the photo redox induced disproportionation products of ruthenium polypiridine complexes is significantly increased from about two milliseconds in a liquid phase to greater than...
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