Class 568/929 - Polycyclo ring system

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Compounds which contain a polycyclo ring system.
No. of patents: 39
Last issue date: 12/04/2007

Number	Title	Issue Date
7303732	Tubular reactor having static mixing elements separated by coalescing zones A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These dr...	12/04/2007
7265251	Process for the preparation of nitroalkenes A process for the nitration of conjugated alkenes of formula (I) wherein R, R1, R2, R3 and R4 have the meanings reported in the description, which allows to obtain the corresponding β-nitro-alkenes, characterised in that the nitrating agent is a mixture of an inorg...	09/04/2007
7211685	Calcium receptor antagonists A compound of the formula [I] wherein R1 is optionally substituted aryl group or optionally substituted heteroaryl group; R2 is optionally substituted C1-6 alkyl group, C3-7 ...	05/01/2007
6943257	Process for preparation of aromatic halides from aromatic amines The present invention provides a process for preparing an aromatic bromide or aromatic iodide from an aromatic amine derivative using nitrite anion and halodimethylsulfonium halide generated in situ from hydrobromic acid/DMSO or hydriodic acid/DMSO. The process for ...	09/13/2005
6403789	Method of halogenating hydroxyl group A halogenating agent of the formula (1) and a method of halogenating hydroxyl group ##STR1## wherein R1 and R2 are the same or different and are each ethyl, propyl, isopropyl, butyl, isobutyl or allyl; X is chlorine atom or bromine ...	06/11/2002
6362381	Nitration of aromatic hydrocarbons Aromatic hydrocarbons are nitrated by a process in which the aromatic hydrocarbon is reacted in the liquid phase with an oxide of nitrogen selected from NO, N2 O3, NO2 and N2 O4 and with an oxygen-con...	03/26/2002
6271411	Process for preparing 2-aryl-substituted indenes A process is disclosed for preparing 2-aryl-substituted indenes by reacting an indene with an arene compound substituted with an halogen atom, preferably a iodine atom, or with an organosulphonate group, said reaction being carried out in a basic medium i...	08/07/2001
6242657	Method for producing aromatic nitro compounds In the reaction of aromatic compounds with nitrating acids comprising HNO3 and, if appropriate, H2 SO4 and/or H2 O and/or H3 PO4 to form aromatic nitro compounds, according to the invention...	06/05/2001
6197825	Azulenyl nitrone spin trapping agents, methods of making and using same The present invention relates to chromotropic nitrone spin trapping agents, methods of making these agents, compositions comprising same, and methods of their use. In particular, azulenyl nitrones of the present invention are effective agents for trapping...	03/06/2001
6194567	Halogenating agent and process for halogenating hydroxyl group A halogenating agent of the formula (1) and a method of halogenating hydroxyl group ##STR1## wherein R1 and R2 are the same or different and are each ethyl, propyl, isopropyl, butyl, isobutyl or allyl; X is chlorine atom or bromine ...	02/27/2001
5886242	Polymerizable, chiral compounds and their use The invention relates to chiral compounds containing at least one divalent or polyvalent chiral group, at least one polymerizable group, at least one spacer and at least one mesogenic group, and to their use as polymerizable, chiral dopes for the preparat...	03/23/1999
5728901	Nitration process which employs water tolerant Lewis acid catalysts A process for preparing a nitrated arene which comprises reacting an arene and nitric acid in the presence of a water tolerant Lewis acid catalyst under process conditions sufficient to form the nitrated arene and recovering the nitrated arene. Suitable L...	03/17/1998
5430157	Reduced phenanthrenes A series of tetrahydrophenanthrenes are useful as inhibitors of 5଱-reductase....	07/04/1995
5313009	Nitration process A continuous process to nitrate a nitratable aromatic compound in a nitronium ion solution in a nitrator. The process comprises feeding into the nitrator nitronium ion solution of a composition within an area defined by connecting three points in a ternar...	05/17/1994
5212301	Substituted fluorobenzenes Introduction of a fluoro substituent into an aromatic ring adjacent an electron donating group is difficult producing mixed isomers and low yields of desired products. A process for the introduction of a fluoro substituent into a substantially adjacent po...	05/18/1993
5210339	Process for nitrating benzocyclobutene compounds An improved process for the nitration of a substituted or unsubstituted benzocyclobutene compound in a reaction mixture comprising a nitrating agent, an unhalogenated carboxylic acid anhydride, clay and a solvent to produce a corresponding nitrobenzocyclo...	05/11/1993
4973770	Manufacture of organic nitro compounds Process for the mononitration of a nitratable organic compound, such as benzene, with a mixed acid in which one of the reactants is delivered into a body of the other reactant in the form of ultra-fine droplets through an atomizing nozzle or similar orifi...	11/27/1990
4853151	Dispirotetradecanes Dispirotetradecanes of the formula I ##STR1## wherein R1 and R2 are each independently of each other alkyl containing 1 to 12 carbon atoms wherein one or more non-adjacent CH2 groups may also be replaced by --O--, --C...	08/01/1989
4791123	Insecticidal triffluormethyl alkane derivatives There are provided new alkane and alkoxyalkane derivatives of the general formula I ##STR1## in which R1, R2, R3, R4 and A have the meanings given in the description, processes for their preparation and ins...	12/13/1988
4755276	Nitro-substituted pitch and process for the production thereof A nitro-substituted pitch demonstrates softening point temperatures in the range of 75°-250° C. and a coking value of at least about 40%. Such pitch is produced by reacting a tar with a nitrating agent at a temperature below 150° C. and above about 0°...	07/05/1988
4570011	Preparation of cyclobutene substituted aromatic hydrocarbons The invention is a process for the preparation of an aromatic hydrocarbon with a cyclobutene ring fused to the aromatic hydrocarbon which comprises, dissolving an ortho alkyl halomethyl aromatic hydrocarbon in an inert solvent and pyrolyzing the solution ...	02/11/1986
4495372	Preparation of mono-nitro aromatic compounds A process for mon-nitrating a plynuclear aromatic compound essentially in the absence of sulfuric acid and a solvent comprising adding nitric acid to a liquid aromatic compound wherein the molar ratio of nitric acid to the aromatic compound in from 0.75/1...	01/22/1985
4447662	Beta-dicarbonyl compounds for the promotion of aromatic nitration by nitrogen tetroxide Aromatic hydrocarbons are nitrated by reacting the aromatic hydrocarbon in a nitrogen tetroxide-containing liquid reaction medium, in the presence of a beta-dicarbonyl compound having a "W" configuration with a carbonyl group at each apex of the "W", pref...	05/08/1984
4415744	Vapor phase nitration of aromatic compounds Aromatic compounds are nitrated in the vapor phase via a process comprising contacting the aromatic compound with a nitrating agent in the presence of a nitration promotion catalyst which comprises the adduct of: (a) an alumina-silica-metal oxide combination r...	11/15/1983
4386007	Liquid crystalline naphthalene derivatives Liquid crystalline naphthalene derivatives of the formula ##STR1## wherein ring A is 1,4-phenylene, trans-1,4-cyclohexylene or 1,4-cyclohex-1-enylene and ring system BC is 2,6-naphthylene, 3,4-dihydro-2,6-naphthylene or 1,2,3,4-tetrahydro-2,6-naphthy...	05/31/1983
4374293	Indene production from aromatic olefins Allylbenzene is converted to indene by means of a tungsten-containing catalyst....	02/15/1983
4335055	Process for the preparation of alkenylbenzene derivatives or alkenylnaphthalene derivatives Compounds of the formula I ##STR1## in which Z, Z1, R, m and p are as defined in patent claim 1, can be obtained in a simple and economical manner by a novel process wherein a halide of the formula II ##STR2## is reacted with a s...	06/15/1982
4331613	Process for the preparation of trifluoromethylnaphthalenes A process for the preparation of an optionally substituted trifluoromethyl-naphthalene which comprises contacting a compound of the formula ##STR1## in which R1 denotes hydrogen, alkyl, aralkyl, aryl, aryloxy, arylthio, polyhalogenoal...	05/25/1982
4252739	Process for the preparation of vinylcyclopropane derivatives This invention provides a convenient and commercially adaptable process for the preparation of vinylcyclopropane derivatives in high yields. The process involves reacting an alkylating agent and an activated methylene compound in the presence of an onium ...	02/24/1981
4241229	Recovery of nitrated aromatic compounds from nitration wash liquors The wash liquor resulting from the nitration of aromatic compounds is contacted with a quantity of the same aromatic compound being nitrated and the resultant solution is recycled to the nitration process....	12/23/1980
4234470	Catalytic nitration of aromatic compounds A process for the continuous catalytic vapor-phase mononitration of aromatic compounds, especially benzene, using as the catalyst an ଱-fluorosulfonic acid polymer admixed with a complement inert to the nitration reaction and dimensionally stable und...	11/18/1980
4207266	Process for the preparation of trifluoromethylated aromatic compounds This invention relates to a novel process for the direct trifluoromethylation of aromatic compounds via carbon tetrachloride and hydrogen fluoride in the presence of strong Bronsted or Lewis acids which give an acidic reaction (increase in concentration o...	06/10/1980
4112005	Process for the preparation of mononitro-aromatic compounds The present invention relates to an improved continuous process for the preparation of mononitro-aromatic compounds which comprises (1) nitrating a reactive aromatic compound in the absence of sulphuric acid until mono-nitration is essentially complete, s...	09/05/1978
4064147	Process for the production of aromatic mononitro compounds Aromatic mononitro compounds are prepared by nitrating aromatic compounds with nitric acid having a concentration between 70 and 100% by weight, working up of the nitration mixture in a rectification column and separation of the aromatic mononitro compoun...	12/20/1977
4021498	Adiabatic process for nitration of nitratable aromatic compounds An adiabatic process for the mononitration of nitratable aromatic hydrocarbons and halo substituted aromatic hydrocarbons which yield a mononitration product containing less than 500 ppm. of dinitrated product is disclosed....	05/03/1977
3981933	Process for making dinitrotoluene Nitrated derivatives of aromatic compounds are obtained by contacting the latter, in the presence of methylene chloride as a reaction medium, with concentrated nitric acid in the presence of concentrated sulfuric acid, and thereafter isolating the formed ...	09/21/1976
3979467	Process for the nitration of haloaromatics A process for the nitration of halogenated aromatic compounds is improved by carrying out the nitration in the presence of a phosphorus compound in an amount sufficient to produce an ortho-directing effect. Phosphoric acid is particularly effective over a...	09/07/1976
3975452	Reprocessing of final acid from nitroglycerine production A process for treating final acid obtained in forming a nitrate of a polyhydric alcohol, said final acid comprising a mixture of sulfuric acid, nitric acid, water and said nitrate, said process comprising mixing said final acid with an aromatic nitro comp...	08/17/1976
3957890	Process for the nitration of haloaromatics It was found that the process for the nitration of halogenated aromatic compounds is improved by carrying out the nitration in the presence of a phosphorus compound in an amount sufficient to produce an ortho-directive effect. The addition of polyvalent m...	05/18/1976

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Class 568/929 - Polycyclo ring system