Nitrogen Bonded Directly To Each Of The Carbocyclic Rings Patents (Class 549/309)
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Patent number: 6872839Abstract: Benzofuran-2-ones, compositions comprising benzofuranones, processes for preparing them, and their use as colorants for high or low molecular mass organic material.Type: GrantFiled: March 3, 2000Date of Patent: March 29, 2005Assignee: Cibaspecialty Chemicals Corp.Inventors: Leonhard Feiler, Thomas Ruch, Olof Wallquist, Peter Nesvadba
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Publication number: 20030220511Abstract: A dibenzofuranonylium methylate compound represented by the following formula (I), having maximum absorption wavelength of over 1 &mgr;m, high thermal stability and good solubility in organic solvents, and a production method thereof are provided: 1Type: ApplicationFiled: April 2, 2003Publication date: November 27, 2003Applicant: Fuji Xerox Co., Ltd.Inventors: Minquan Tian, Makoto Furuki, Lyong Sun Pu, Yasuhiro Sato, Izumi Iwasa, Satoshi Tatsuura
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Patent number: 6133184Abstract: A carrier containing silicon carbide, inorganic bonding component, and at least one oxide selected from the group consisting of a niobium oxide, an antimony oxide, and a tungsten oxide carries at least one oxide selected from the group consisting of a vanadium oxide and a molybdenum oxide as catalytically active component. An inexpensive catalyst for catalytic oxidation use can be thus offered that does not change its properties over a period of time, that boasts stable catalytic activity over a period of time, and that is suitable for, e.g., manufacture of an acid anhydride and a nitrile compound by conducting a catalytic gas-phase oxidation reaction (partial oxidation reaction) on a hydrocarbon.Type: GrantFiled: October 2, 1998Date of Patent: October 17, 2000Assignee: Nippon Shokubai Co., Ltd.Inventors: Yasushi Kiyooka, Masaaki Okuno
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Patent number: 5973168Abstract: A process for preparing a phthalide compound represented by the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are individually an alkyl group, and R.sup.1 and R.sup.2, R.sup.3 and R.sup.4, and R.sup.5 and R.sup.6 can respectively bond to each other to form a heterocyclic ring together with a nitrogen atom, comprising oxidizing a triphenylmethane compound represented by the formula (2) ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are the same as above, is oxidized in the presence of activated carbon in an aqueous solvent by an oxidizing agent.The process can provide a fast reaction that produces a high purity product with high yield.Type: GrantFiled: June 15, 1998Date of Patent: October 26, 1999Assignees: Mitsui Chemicals, Inc., Yamamoto ChemicalsInventors: Takeshi Nishimura, Masaru Wada, Yoshinobu Kanemura, Satoshi Nakao, Mansuke Matsumoto
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Patent number: 4732991Abstract: Process comprises the combination of the three steps of condensing 3-N(R).sub.2 -4-X-benzoic acid with an aromatic or heterocyclic aldehyde, Y-CHO, under acidic conditions to produce 3-Y-5-X-6-N(R).sub.2 phthalide (II), condensing said phthalide with a compound of the formula Z-H under alkaline or acid conditions to produce 2-(.alpha.-Y-.alpha.-Z)methyl-4-X-5-N(R).sub.2 benzoic acid (III), and oxidizing said benzoic acid to produce 3-Y-3-Z-5-X-6-N(R).sub.2 phthalide (I) where: R is hydrogen, non-tertiary alkyl of one to four carbon atoms, benzyl or substituted benzyl; X is hydrogen or halo; Y is 4-R.sup.1 -3-R.sup.2 -2-R.sup.1 -phenyl, 1-R.sup.5 -2-R.sup.6 -5/6-R.sup.4 -3-indolyl, 9-R.sup.7 -3-carbazolyl, 9-julolidinyl, 3,4-dioxymethylenephenyl, 2-thienyl, 1-R.sup.8 -2-pyrrolyl, or 4-pyridinyl; and Z is 4-R.sup.1 -3-R.sup.2 -2-R.sup.1 -phenyl, 1-R.sup.5 -2-R.sup.6 -5/6-R.sup.4 -3-indolyl or 1-R.sup.Type: GrantFiled: February 18, 1986Date of Patent: March 22, 1988Assignee: Hilton Davis Chemical Co.Inventors: Paul J. Schmidt, Nathan N. Crounse
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Patent number: 4533499Abstract: A process for the production of a compound of formula ##STR1## which comprises reacting a compound of formula ##STR2## or a mixture of the compounds (2a) and (2b) with a compound ZH or a compound of formula ##STR3## or a mixture of the compounds (2c) and (2d) with a compound YH, both reactions under acidic conditions, wherein X and Y are the same or different and each represents an aromatic carbocyclic radical having an unsubstituted or substituted amino group in the para position to the indicated bond, or a heterocyclic group, and Z represents an aryl radical of formula ##STR4## wherein R.sub.1 and R.sub.2 independently of one another represent hydrogen, C.sub.1 -C.sub.12 alkyl, C.sub.2 -C.sub.8 -alkoxyalkyl, cycloalkyl, aralkyl, aryl, or substituted alkyl, cycloalkyl, aralkyl or aryl, or R.sub.1 and R.sub.Type: GrantFiled: April 6, 1984Date of Patent: August 6, 1985Assignee: Ciba-Geigy CorporationInventors: Malcolm C. Clark, John B. Henshall, Derrick A. Hart
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Patent number: 4455435Abstract: Leuco Crystal Violet Lactone is prepared by condensing one molar proportion of each of N,N-dimethylaniline, p-dimethylaminobenzaldehyde, and m-dimethylaminobenzoic acid with 0-1 molar proportion of urea and 1-4 molar proportions of a strong acidic condensing agent.Type: GrantFiled: January 22, 1979Date of Patent: June 19, 1984Assignee: American Cyanamid CompanyInventors: John P. Dundon, Erwin Klingsberg
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Patent number: 4439610Abstract: A process is described for preparing triarylmethane derivatives of a high purity in an extremely high yield from 3-phenylphthalide derivatives and aniline derivatives or indole derivatives with Friedel-Crafts type catalyst or Friedel-Crafts type catalyst and an oxidizing agent.Type: GrantFiled: March 4, 1977Date of Patent: March 27, 1984Assignee: Kanzaki Paper Manufacturing Company, Ltd.Inventors: Mitsuru Kondo, Kiyoshi Yasui, Makoto Miyake, Hiroshi Iwasaki, Tetsuo Shiraishi
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Patent number: 4414399Abstract: Dialkylamino-substituted 2-anilino-5'/6'-carboxyfluorans, 2-amino and substituted amino-5'-6'-carboxyfluorans, 1,3-dialkyl-5'/6'-carboxyfluorans, esterified dialkylamino-substituted 2-anilino-5'/6'-carboxyfluorans, 2-amino and substituted amino-5'/6'-carboxyfluorans, 1,3-dialkyl-5'/6'-carboxyfluorans and 3,3-(corresponding-substituted-diaryl)-5/6-carboxyphthalides useful as color formers, particularly in carbonless duplicating and thermal marking systems, are prepared by the interaction of 4/5-carboxy-2-(4-dialkylamino-substituted-2-hydroxybenzoyl)benzoic acids and substituted diphenylamines to produce the phthalides which are then subjected to ring closure to produce the carboxyfluorans and by the interaction of 4/5-carboxy-2-(4-dialkylamino-substituted-2-hydroxybenzoyl)benzoid acids and substituted 4-hydroxyacetanilides or alkyl phenols which are esterified with alkyl halides or dialkyl sulfates.Type: GrantFiled: April 15, 1983Date of Patent: November 8, 1983Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, William M. Hung
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Patent number: 4399291Abstract: Process comprises the combination of the two steps of condensing Y-benzaldehyde with N--R.sup.2 --N--R.sup.3 -aniline and 3--N--R--N--R.sup.1 -benzoic acid, under acidic conditions to produce 2-[(Y-phenyl) (4--N--R.sup.2 --N--R.sup.3 -aminophenyl)methyl]-5--N--R--N--R.sup.1 -aminobenzoic acid, and oxidizing said benzoic acid to produce 3-(Y-phenyl)-3-(4--N--R.sup.2 --N--R.sup.3 -aminophenyl)-6--N--R--N--R.sup.1 -aminophthalide.Type: GrantFiled: December 9, 1981Date of Patent: August 16, 1983Assignee: Sterling Drug Inc.Inventors: Paul J. Schmidt, Patrick J. Jefferies