The Five-membered Hetero Ring Shares Ring Carbons With Two Benzene Rings (i.e., Carbazoles) Patents (Class 548/440)
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Patent number: 5519134Abstract: Novel pyrrolidine monomers bearing various functional groups are used to prepare oligomeric structures. The pyrrolidine monomers can be joined via standard phosphate linkages including phosphodiester and phosphorothioate linkages. Useful functional groups include nucleobases as well as polar groups, hydrophobic groups, ionic groups, aromatic groups and/or groups that participate in hydrogen-bonding.Type: GrantFiled: January 11, 1994Date of Patent: May 21, 1996Assignee: Isis Pharmaceuticals, Inc.Inventors: Oscar L. Acevedo, Normand Hebert
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Patent number: 5516920Abstract: The invention described novel compounds of formula ##STR1## wherein the general symbols are as defined in claim 1, as stabilisers for protecting organic materials, in particular polymers and lubricants, against thermal, oxidative or light-induced degradation.Type: GrantFiled: September 12, 1994Date of Patent: May 14, 1996Assignee: Ciba-Geigy CorporationInventors: Peter Nesvadba, Samuel Evans, Christoph Krohnke, Jurg Zingg
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Patent number: 5496834Abstract: The present invention provides novel compound of the formulas (Ia) or (I): ##STR1## wherein Q is one or two amino acid residues which may be substituted; R.sup.3 is a carboxyl group which may be esterified or an acyl group; A is an alkylene group; B is hydrogen or an alkyl group which may be substituted or an acyl group; or a salt thereof; ##STR2## wherein R.sup.1 and R.sup.2 may be the same or different and each is hydrogen or a hydrocarbon residue which may be substituted; R.sup.3, A and B have the same definitions as those shown above; m and n each is 0 or 1; provided that where both m and n are both equal to 0, R.sup.3 is a carboxyl group which may be esterified or an acyl group having not less than 7 carbon atoms; or a salt thereof.The compound (Ia) or (I) shows cathepsin L inhibitory and bone resorption inhibitory activities and are useful as a prophylactic/therapeutic agent for osteoporosis.Type: GrantFiled: September 2, 1994Date of Patent: March 5, 1996Assignee: Takeda Chemical Industries, Ltd.Inventors: Takashi Sohda, Yukio Fujisawa, Satoru Oi, Junji Mizoguchi
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Patent number: 5459264Abstract: A method for reducing an .alpha.,.beta.-unsaturated ketone of the present invention includes the step of treating the .alpha.,.beta.-unsaturated ketone with a silyl compound in the presence of a Lewis acid and alcohol to selectively reduce the carbonyl group of the .alpha.,.beta.-unsaturated ketone. According to this method, a deoxy-compound can be obtained from the .alpha.,.beta.-unsaturated ketone by selectively reducing the carbonyl group without reducing an .alpha.,.beta.-unsaturated bond.Type: GrantFiled: December 17, 1993Date of Patent: October 17, 1995Assignee: Shionogi Seiyaku Kabushiki KaishaInventors: Mitsuru Imuta, Makoto Kobayashi, Teruo Iizuka
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Patent number: 5443758Abstract: A steroidal ketone compound having a substituted or unsubstituted aromatic group or heterocyclic aromatic group is useful as a non-linear optical material in a non-linear optical device.Type: GrantFiled: September 8, 1992Date of Patent: August 22, 1995Assignee: Hatachi Chemical Company, Ltd.Inventor: Makoto Kaji
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Patent number: 5395969Abstract: A compound suitable for use as a charge transport compound in organic photoconductors or as a charge control agent in electrophotographic toners. The compound, in the neutral form, is of the Formula (1): ##STR1## wherein: Ar is of formula (a), (b) or (c) ##STR2## each L independently is H, C.sub.1-4 -alkyl or halo; R.sup.1, R.sup.3 and R.sup.4 are each independently alkyl, substituted alkyl, aryl, substituted aryl, aralkyl, substituted aralkyl, cycloalkyl or allyl;R.sup.2 is an alkyl, aralkyl, cycloalkyl, allyl or aryl group which is unsubstituted or substituted by a group defined by X.sup.4 ; andX.sup.1, X.sup.2, X.sup.3, X.sup.4 & X.sup.5 are each independently H or a group capable of stabilising a positive charge on the adjacent carbon atom.Type: GrantFiled: July 23, 1993Date of Patent: March 7, 1995Assignee: Zeneca LimitedInventors: Raymond S. Gairns, Anthony A. Watson
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Patent number: 5387694Abstract: The present invention relates to chromogenic methylenepyrrolines and processes and intermediates for their preparation and to their use.The chromogenic methylenepyrroline compounds according to the invention have the formula (I) defined in claim 1.These colour formers are suitable in particular for thermographic recording processes and produce intensive red, violet, blue or brown colourations. They are distinguished by the fact that they do not require any conventional electron-withdrawing acid colour developer.Type: GrantFiled: April 23, 1993Date of Patent: February 7, 1995Assignee: Ciba-Geigy CorporationInventor: Davor Bedekovic
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Patent number: 5322951Abstract: An intermediate compound of Formula (V): ##STR1## wherein G is COQ.sub.1 and Q.sub.1 represents chloro, bromo, C.sub.1-4 alkoxy, PhO--, Cl.sub.5 C.sub.6 O--, Cl.sub.3 CO--, succinimidyloxy or imidazolyloxy; the remainder of the terms R.sub.1, R.sub.2, R.sub.3, R.sub.4, X and Y are defined in the specification. The intermediates of Formula V are useful for preparing 1-(2,3-dihydro-1-carboxamide final products wherein said final products possess 5-HT M-receptor antagonist activity.Type: GrantFiled: November 13, 1992Date of Patent: June 21, 1994Assignee: Beecham Group, p.l.c.Inventors: Francis D. King, Karen A. Joiner
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Patent number: 5278315Abstract: A compound of Formula (1): ##STR1## wherein: Ar is ##STR2## R.sup.1 is alkyl, substituted alkyl, aryl or substituted aryl, aralkyl or substituted aralkyl;R.sup.2 is alkyl, substituted alkyl, aralkyl or substituted aralkyl;X.sup.1, X.sup.2 & X.sup.3 are each independently H or a group capable of stabilising a positive charge on the adjacent carbon atom; andX.sup.4 & X.sup.5 are each independently H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy or C.sub.1-4 -alkylthio;which is suitable for use as a charge transport compound in organic photoconductors or as a charge control agent in electrophotographic toners.Type: GrantFiled: November 7, 1991Date of Patent: January 11, 1994Assignee: Imperial Chemical Industries plcInventors: Raymond S. Gairns, Anthony A. Watson
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Patent number: 5254700Abstract: There is disclosed a process for the production of N-substituted carbazoles with high efficiency, in which a carbazole compound is reacted with an appropriate halogenated compound in an inert solvent in the presence of an acid-removing agent and an amine without using any quaternary ammonium salt which is required in the conventional process.Type: GrantFiled: February 19, 1993Date of Patent: October 19, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Masashi Kamitamari, Takashi Kamikawa, Osamu Maruyama, Shinzaburo Masaki, Junji Shiraiwa
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Patent number: 5204374Abstract: New cycloalkano[b]dihydroindoles and -indolesulphonamides, substituted by heterocycles, of the formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different andrepresent hydrogen, nitro, cyano, halogen, trifluoromethyl, carboxyl, hydroxyl or trifluoromethoxy, orrepresent a group of the formula --S(O).sub.w R.sup.5, in whichR.sup.5 denotes alkyl or optionally substituted aryl,w denotes the number 0, 1 or 2, orrepresents alkoxy or alkoxycarbonyl, or benzyloxy, orrepresents a group of the formula --NR.sup.6 R.sup.7, in whichR.sup.6 and R.sup.7 are identical or different anddenote hydrogen, alkyl or acyl ordenote aryl, ordenote a group of the formula --S(O).sub.w R.sup.5, in which R.sup.Type: GrantFiled: April 3, 1991Date of Patent: April 20, 1993Assignee: Bayer AktiengesellschaftInventors: Ulrich E. Muller, Ulrich Rosentreter, Ulrich Niewohner, Elisabeth Perzborn, Erwin Bischoff, Hans-Georg Dellweg, Peter Norman, Nigel J. Cuthbert, Hilary P. Francis
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Patent number: 5169987Abstract: A squarylium compound represented by formula (III) ##STR1## wherein R.sub.4 represents a hydrogen atom, a methyl group, or a fluorine atom.Type: GrantFiled: December 7, 1990Date of Patent: December 8, 1992Assignee: Fuji Xerox Co., Ltd.Inventors: Yutaka Akasaki, Akihiko Tokida, Kaoru Torikoshi, Tooru Ishii, Hidemi Suto, Akira Imai
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Patent number: 5159087Abstract: Aromatic diolefinic compounds including 1,4-divinylbenzene derivatives, which are useful not only as organic photoconductive materials for electrophotography, but also as intermediates for producing diethyl aromatic compounds which are also useful as organic photoconductive materials for electrophotography, the aromatic diethyl compounds, an electrophotographic photoconductor containing any of the above aromatic diethyl compounds in a photosensitive layer thereof, and a charge transporting medium containing any of the aromatic diethyl compound are disclosed.Type: GrantFiled: January 17, 1991Date of Patent: October 27, 1992Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto
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Patent number: 5097034Abstract: Color formers of the formula ##STR1## in which X.sup.1 denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy or acyloxy,R.sup.1 denotes hydrogen, halogen, alkyl or alkoxy,R.sup.2 denotes hydrogen, alkoxy, aralkoxy, aryloxy or a radical of the formula ##STR2## Y.sup.1 and Y.sup.2, independently of one another, denote alkyl, cycloalkyl or aralkyl,R.sup.2 can form a heterocyclic ring with A in the o-position, in which a benzene ring can be additionally fused onto ring A in the o-/m-position with respect to R.sup.2,R.sup.3 denotes hydrogen, alkyl, alkenyl, aralkyl, cycloalkyl or aryl, or R.sup.3 is linked to ring B in the o-position with respect to the nitrogen,Z.sup.1 stands for the remaining members of a partially hydrogenated or completely hydrogenated ring, with the proviso that Z.sup.Type: GrantFiled: May 14, 1991Date of Patent: March 17, 1992Assignee: Bayer AktiengesellschaftInventor: Udo Eckstein
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Patent number: 5041238Abstract: Disclosed are organic laser dyes and more particularly o,o'-bridged oligophenylene laser dyes which when excited to lase emit radiation in various ranges and especially in the ultraviolet and violet ranges, that is, from about 300 nm to about 420 nm, of the light spectrum. An organic laser dye of this invention comprises an oligophenylene having at least one biphenyl moiety bridged between adjacent ortho positions via a single atom or a plural of atom substituents of various sizes. In one most preferred embodiment, the substituent bonded to the phenyl moieties forming the bridge is a carbon atom free of benzylic hydrogens. The bridging substituent can also be other atoms or groups free of reactive substituents. In another most preferred embodiment, the o,o'-bridged oligophenylene laser dyes are free of vinylene groups bonded directly to the phenyl moieties forming the oligophenylene chains.Type: GrantFiled: August 22, 1988Date of Patent: August 20, 1991Assignee: Exciton Chemical CompanyInventors: Joel M. Kauffman, Charles J. Kelley, Richard N. Steppel
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Patent number: 5037578Abstract: Disclosed are organic laser dyes and more particularly o,o'-bridged oligophenylene laser dyes which when excited to lase emit radiation in various ranges and especially in the ultraviolet and violet ranges, that is, from about 300 nm to about 420 nm, of the light spectrum. An organic laser dye of this invention comprises an oligophenylene having at least one biphenyl moiety bridged between adjacent ortho positions via a single atom or a plural of atom substituents of various sizes. In one most preferred embodiment, the substituent bonded to the phenyl moieties forming the bridge is a carbon atom free of benzylic hydrogens. The bridging substituent can also be other atoms or groups free of reactive substituents. In another most preferred embodiment, the o,o'-bridged oligophenylene laser dyes are free of vinylene groups bonded directly to the phenyl moieties forming the oligophenylene chains.Type: GrantFiled: April 2, 1990Date of Patent: August 6, 1991Assignee: Exciton Chemical CompanyInventors: Joel M. Kauffman, Charles J. Kelley, Richard N. Steppel
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Patent number: 5028708Abstract: This invention provides azamethine compounds represented by the formula (I): ##STR1## (wherein X represents ##STR2## Y represents C.dbd.O, C.dbd.C(CN).sub.2 or SO.sub.2 ; R.sub.1 to R.sub.4 represent independently a hydrogen atom, an alkyl group which may be substituted, an alkoxyl group which may be substituted, a halogen atom, a nitro group, a cyano group, a hydroxyl group, an amino group which may be substituted, --A--R or ##STR3## R.sub.5 and R.sub.6 represent independently a hydrogen atom, an alkyl group which may be substituted, an aryl group which may be substituted or a cyclohexyl group; R.sub.5 and R.sub.6 may be combined to form a ring or may form a ring with a hetero atom; R.sub.7 and R.sub.Type: GrantFiled: April 8, 1988Date of Patent: July 2, 1991Assignee: Sumitomo Chemical Company, LimitedInventors: Takeshi Hioki, Kiyoteru Kojima, Jun Tomioka
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Patent number: 5011939Abstract: A hydroxy arylamine compound is disclosed represented by the formula: ##STR1## wherein: m is 0 or 1,Z is selected from the group consisting of: ##STR2## n is 0 or 1, Ar is selected from the group consisting of: ##STR3## R is selected from the group consisting of --CH.sub.3, --CH.sub.2 H.sub.5, --C.sub.3 H.sub.7, and --C.sub.4 H.sub.9,Ar' is selected from the group consisting of: ##STR4## X is selected from the group consisting of: ##STR5## s is 0, 1 or 2, the dihydroxy arylamine compound being free of any direct conjugation between the --OH groups and the nearest nitrogen atom through one or more aromatic rings. The dihydroxy arylamine compound may be employed in an electrophotographic imaging member and the member may be used in an electrophotographic imaging process.Type: GrantFiled: May 23, 1989Date of Patent: April 30, 1991Assignee: Xerox CorporationInventors: William W. Limburg, John F. Yanus, Dale S. Renfer, Richard L. Schank, Beng S. Ong
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Patent number: 4970309Abstract: This invention relates to a novel method of synthesizing di- and triarylmethane dye precursor compounds possessing a thiolactone ring-closing moiety, from the corresponding lactones.Type: GrantFiled: December 7, 1989Date of Patent: November 13, 1990Assignee: Polaroid CorporationInventor: Patrick F. King
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Patent number: 4960886Abstract: A charge transfer complex formed between a benzoquinone derivative represented by formula ##STR1## wherein at least one of the rings A and B represents a heterocyclic ring as defined in the specification, and an electron donor, and a salt of an anion or anion radical of the benzoquinone derivative of the above formula are disclosed. The charge transfer complex and the salt are useful as electronic materials.Type: GrantFiled: December 11, 1987Date of Patent: October 2, 1990Assignees: Fuji Xerox Co., Ltd., Toshio MukaiInventors: Toshio Mukai, Yoshiro Yamashita, Takanori Suzuki
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Patent number: 4927842Abstract: Substituted 2,3,4,9-tetrahydro-1H-carbazole-1-acetic acid derivatives and methods for their preparation and use are disclosed. The compounds are useful anti-inflammatory agents.Type: GrantFiled: September 29, 1989Date of Patent: May 22, 1990Assignee: American Home Products CorporationInventor: Dominick Mobilio
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Patent number: 4914213Abstract: A 5-hydroxy-N-substituted indole derivative and the process for producing the indole derivative are described the indole derivative is produced by a process comprising reacting a phenol derivative having an unsaturated double bond in the m-position with a diazonium salt.Type: GrantFiled: February 4, 1987Date of Patent: April 3, 1990Assignee: Fuji Photo Film Co., Ltd.Inventor: Masato Satomura
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Patent number: 4904810Abstract: Aqueous bischloroformates are prepared by the reaction of a dihydroxyaromatic compound (e.g., bisphenol A) with phosgene in a substantially inert organic liquid (e.g., methylene chloride) and in the presence of an aqueous alkali metal or alkaline earth metal base, at a pH below about 8. After all solid dihydroxyaromatic compound has been consumed, the pH is raised to a higher value in the range of about 7-12, preferably 9-11, and maintained in said range until a major proportion of the unreacted phosgene has been hydrolyzed. At the same time, any monochloroformate in the product may be converted to bischloroformate.Type: GrantFiled: July 25, 1988Date of Patent: February 27, 1990Assignee: General Electric CompanyInventors: Daniel J. Brunelle, Thomas G. Shannon
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Patent number: 4897223Abstract: Color-forming agents of the general formula ##STR1## wherein X denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy, cycloalkoxy, aryloxy, acyloxy, alkoxycarbonyloxy, alkylamino, dialkylamino, acylamino, aralkylamino or arylamino,Q denotes cyano, alkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, N-alkyl-N-aryl-carbamoyl, acyl, alkoxysulphonyl, aralkoxysulphonyl, sulphamoyl, N-alkylsulphamoyl, N,N-dialkylsulphamoyl, alkylsulphonyl, arylsulphonyl or aralkylsulphonyl andR denotes alkyl, alkenyl or aralkyl,further isocyclic or heterocyclic rings can be fused on to the rings A, B, C and D, and the cyclic and acyclic radicals and the rings A, B, C and D can carry further substituents, are used for the preparation of pressure-sensitive recording materials.Type: GrantFiled: March 1, 1988Date of Patent: January 30, 1990Assignee: Bayer AktiengesellschaftInventors: Udo Eckstein, Hubertus Psaar, Roderich Raue
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Patent number: 4892949Abstract: An electrophotograhic photoconductor is disclosed which comprises an electroconductive support material and a photosensitive layer comprising at least one of the stilbene compounds of the formula ##STR1## wherein R.sup.1 represents hydrogen or ##STR2## R.sup.2 represents hydrogen, an alkyl group or a substituted or unsubstituted phenyl group; A represents ##STR3## when R.sup.1 is hydrogen; while when R.sup.1 is ##STR4## A represents ##STR5## a 9-anthryl group or a substituted or unsubstituted N-alkylcarbazolyl group, wherein R.sup.3 represents hydrogen, an alkyl group, an alkoxy group, a halogen or a substituted amino group represented by ##STR6## in which R.sup.4 and R.sup.5 independently represent an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group, and R.sup.4 and R.sup.5 may form a ring in combination, and m is an integer of 0 through 3 and n is an integer of 0 or 1, provided that, when R.sup.1 is hydrogen and n=0, A is ##STR7## in which R.sup.Type: GrantFiled: August 9, 1988Date of Patent: January 9, 1990Assignee: Ricoh Company, Ltd.Inventor: Masaomi Sasaki
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Patent number: 4883655Abstract: The invention relates primarily to quaternized polycyclic compounds having the formula ##STR1## wherein m is an integer having a value of from 1 to 4; R is alkylene having from 3 to 8 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; R.sub.2 together with the quaternary nitrogen, forms a 5 to 14 membered heterocyclic ring, said ring containing from 1 to 2 hetero atoms selected from the group of nitrogen, sulfur and oxygen; R.sub.1 forms a double bond in the heterocyclic ring of the quaternized nitrogen or is alkyl, alkyleneoxyalkyl, alkylhydroxy, aryl, aralkyl, aralkenyl, alkaryl, alkylamidoalkyl and X.sup.- is a chloride, bromide or iodide anion. The invention also relates to the preparation and use of said quaternized polycyclic compounds.Type: GrantFiled: August 28, 1987Date of Patent: November 28, 1989Assignee: GAF CorporationInventors: Robert B. Login, Ratan K. Chaudhuri, David J. Tracy, Michael W. Helioff
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Patent number: 4868190Abstract: There are described compounds of the formula: ##STR1## where, X is hydrogen, loweralkyl, loweralkoxy or halogen;Y is hydrogen, loweralkyl or halogen;Z is hydrogen, loweralkyl or halogen;R is hydrogen, loweralkyl, loweralkenyl, loweralkylcarbonyl, dimethylaminoloweralkyl or ##STR2## m being an integer of 1 to 6, with the proviso that when R is loweralkenyl the double bond is not alpha to the nitrogen atom;which compounds are useful analgesic, anticonvulsant and antidepressant agents, and for treating various memory dysfunctions characterized by decreased cholinergic function such as Alzheimer's disease.Type: GrantFiled: December 27, 1988Date of Patent: September 19, 1989Assignee: Hoechst-Roussel Pharmaceuticals, Inc.Inventors: Richard C. Effland, Joseph T. Klein, Larry Davis, Gordon E. Olsen
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Patent number: 4859556Abstract: An electrophotographic photoconductor is disclosed which comprises an electroconductive support material and a photosensitive layer comprising at least one of the stilbene compounds of the formula ##STR1## wherein R.sup.1 represents hydrogen or ##STR2## R.sup.2 represents hydrogen, an alkyl group or a substituted or unsubstituted phenyl group; A represents ##STR3## when R.sup.1 is hydrogen; while, when R.sup.1 is ##STR4## A represents ##STR5## a 9-anthryl group or a substituted or unsubstituted N-alkylcarbazolyl group, wherein R.sup.3 represents hydrogen, an alkyl group, an alkoxy group, a halogen or a substituted amino group represented by ##STR6## in which R.sup.4 and R.sup.5 independently represent an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group, and R.sup.4 and R.sup.5 may form a ring in combination, and m is an integer of 0 through 3 and n is an integer of 0 or 1, provided that, when R.sup.1 is hydrogen and n=0, A is ##STR7## in which R.sup.Type: GrantFiled: August 9, 1988Date of Patent: August 22, 1989Assignee: Ricoh Company, Ltd.Inventor: Masaomi Sasaki
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Patent number: 4707553Abstract: A 5-hydroxy-N-substituted indole derivative and the process for producing the indole derivative are described the indole derivative is produced by a process comprising reacting a phenol derivative having an unsaturated double bond in the m-position with a diazonium salt.Type: GrantFiled: December 28, 1984Date of Patent: November 17, 1987Assignee: Fuji Photo Film Co., Ltd.Inventor: Masato Satomura
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Patent number: 4656182Abstract: Substituted trans-1,2-diaminocyclohexyl amide compounds demonstrating selective opioid receptor binding possess utility as analgesic, diuretic, and psychotherapeutic agents. A method of preparing the compounds, pharmaceutical compositions employing the compounds, and a method of alleviating pain employing the compounds are also disclosed.Type: GrantFiled: November 13, 1984Date of Patent: April 7, 1987Assignee: Warner-Lambert CompanyInventor: David Horwell
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Patent number: 4628106Abstract: The invention relates to a process for the preparation of 2-hydroxy-(9H)-carbazole. In this process, 1,2,3,4-tetrahydro-7-hydroxy-(9H)-carbazole is dehydrogenated in an inert organic solvent.Type: GrantFiled: March 19, 1985Date of Patent: December 9, 1986Assignee: Hoechst AktiengesellschaftInventors: Otto E. Schweikert, Walter Reimann, Werner Wykypiel, Karl E. Mack
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Patent number: 4599410Abstract: Methine dyes are disclosed which contain a 2-halo or pseudohalo substituted 1,2,5-oxatellurazole ring fused with an aromatic nucleus, the aromatic nucleus being substituted with a methine linkage terminating in an auxochrome providing a conjugated resonance chromophore. The dyes can be formed by condensing a methine linkage precursor with a compound containing an oxatellurazole ring fused with an aromatic nucleus. The dyes are useful in optical recording elements and in photographic elements.Type: GrantFiled: February 19, 1985Date of Patent: July 8, 1986Assignee: Eastman Kodak CompanyInventor: Wolfgang H. H. Gunther
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Patent number: 4558043Abstract: Benzofurans or 2,3-dihydrobenzofurans of the formula ##STR1## in which R.sub.1 represents hydrogen or an aliphatic radical,R.sub.2 represents an amino group disubstituted by a bivalent aliphatic radical which is optionally interrupted by at least one hetero atom,and the aromatic ring may be additionally substituted,and the salts thereof, have anti-inflammatory and/or analgesic activities.Type: GrantFiled: July 11, 1984Date of Patent: December 10, 1985Assignee: Ciba Geigy CorporationInventors: Paul Wenk, Werner Breitenstein, Marcus Baumann
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Patent number: 4551536Abstract: A class of N,N',N"-trisubstituted bis-(p-aminobenzyl) anilines are found to be effective antioxidants in a broad spectrum of petroleum and petroleum related products. N,N',N"-Tri(arylmethyl) and tri(heteroarylmethyl) substituted materials of the parent compound are especially effective at concentrations as low as about 0.0005 percent by weight.Type: GrantFiled: July 15, 1983Date of Patent: November 5, 1985Assignee: UOP Inc.Inventor: John T. Roberts
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Patent number: 4521605Abstract: Carbazole compounds of formula (I) are disclosed, which are useful as photoconductors for electrophotography and fluorescent brightening agent in the field of paints, ##STR1## wherein R represents a C.sub.2.about.4 alkyl group, or a benzyl group; X.sup.1 represents hydrogen, a C.sub.1.about.4 alkyl group, a C.sub.1.about.4 alkoxyl group, a halogen atom, a nitro group, an amino group, a C.sub.1.about.4 alkylamino group or a benzylamino group; and n is an integer 1 or 2. A method of preparing a carbazole compound of formula (II) is also disclosed, in which a phenyl derivative of formula (III) is caused to react with an aldehyde of formula (IV), ##STR2## wherein R represents a C.sub.2.about.4 alkyl group, or a benzyl group; X.sup.2 represents hydrogen, a C.sub.1.about.4 alkyl group, a C.sub.1.about.4 alkoxyl group, a halogen atom, a nitro group; and m is an integer 0 or 1; ##STR3## wherein X.sup.Type: GrantFiled: September 24, 1982Date of Patent: June 4, 1985Assignees: Hodogaya Chemical Co., Ltd., Ricoh Company, Ltd.Inventors: Hideo Okazaki, Hiroshi Imagome, Susumu Suzuka, Kiyoshi Sakai
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Patent number: 4451545Abstract: An electrophotographic element comprising an electrically conductive substrate and a photosensitive layer, superposed thereon, containing a carbazole derivative compound having the following general formula (I): ##STR1## (wherein R is a lower alkyl group or a benzyl group; X is a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a nitro group, an amino group or a lower alkyl group- or benzyl group-substituted amino group; and n is an integer such as 1 or 2).Type: GrantFiled: September 23, 1982Date of Patent: May 29, 1984Assignee: Ricoh Co., Ltd.Inventors: Mitsuru Hashimoto, Kiyoshi Sakai
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Patent number: 4451548Abstract: Disclosed is an electrophotographic photoreceptor which comprises, on an electroconductive support, a light sensitive layer containing a carrier generation material, a carrier transport material consisting of a carbazole derivative represented by the following general formula I: ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4 and Ar are as defined in the specification.Type: GrantFiled: March 2, 1982Date of Patent: May 29, 1984Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Akira Kinoshita, Osamu Sasaki, Kiyoshi Sawada, Satoshi Goto
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Patent number: 4436920Abstract: Recording members having excellent light resistance are obtained by using as a dye precursor specific diarylaminofluoran compounds.Type: GrantFiled: March 11, 1982Date of Patent: March 13, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Sato, Ken Iwakura, Akira Igarashi
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Patent number: 4340540Abstract: To prepare basic dyestuffs of the general formula ##STR1## in which A and B independently of one another represent a hetero-aromatic radical or a radical of the general formula ##STR2## compounds of the general formulaA--CH.sub.2 --BA and B have the abovementioned meaning,are oxidized with oxygen in the presence of a nucleophilic compound of the general formulaD--Hand in the presence of catalytic amounts of benzoquinones substituted by halogen or cyano or of phenanthrenequinones substituted by nitro, and in the presence of catalytic amounts of nitrogen oxides--with the exception of dinitrogen monoxide--or of substances which produce such nitrogen oxides under the reaction conditions.Type: GrantFiled: June 26, 1980Date of Patent: July 20, 1982Assignee: Bayer AktiengesellschaftInventor: Karl H. Hermann
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Patent number: 4330476Abstract: To synthesize triarylmethane dyestuffs of the general formula ##STR1## in which R.sup.1 and R.sup.2 represent optionally substituted alkyl, aryl or aralkyl orR.sup.1 and R.sup.2, together or with the ortho-position of the phenyl ring, form a heterocyclic ring and R.sup.1 can additionally represent hydrogen,R.sup.3 and R.sup.4 denote hydrogen or non-ionic substituents,n represents an integer from 1 to 4 andX.sup.- denotes an anion,by a one-pot process, an aldehyde of the general formula ##STR2## in which R.sup.4 and n have the abovementioned meaning,is subjected to a condensation reaction with an aromatic amine of the general formula ##STR3## in which R.sup.1, R.sup.2, R.sup.Type: GrantFiled: June 26, 1980Date of Patent: May 18, 1982Assignee: Bayer AktiengesellschaftInventor: Karl H. Hermann