Two Carbocyclic Rings Bonded Directly To The Same Ring Atom Of The Lactone Ring Patents (Class 549/308)
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Patent number: 7915430Abstract: A method of producing a phenolphthalein comprises reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group, and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises a metal oxide composition in combination with a porous support, wherein the metal is molybdenum, tungsten, or a combination comprising at least one of the foregoing metals.Type: GrantFiled: September 29, 2008Date of Patent: March 29, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Venkata Rama Narayanan Ganapathy Bhotla, Shivappa Basappa Halligudi, Gurram Kishan, Salkod Parameshwar Mallika, Bhaskar Veldurthy
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Patent number: 7868190Abstract: A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group; and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises, on a porous support, a calcination product of a heteropolyacid composition.Type: GrantFiled: September 29, 2008Date of Patent: January 11, 2011Assignee: Sabic Innovative Plastics IP B.V.Inventors: Venkata Rama Narayanan Ganapathy Bhotla, Shivappa Basappa Halligudi, Gurram Kishan, Salkod Parameshwar Mallika, Bhaskar Veldurthy
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Patent number: 7838689Abstract: A method for producing a phenolphthalein compound is disclosed, comprising: reacting a phenolic compound of the formula: wherein Ra is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of an ionic liquid catalyst composition and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each Ra is independently a hydrogen or a C1-C12 hydrocarbyl group, and Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the ionic liquid catalyst composition comprises a combination of an ionic liquid and a metal halide wherein the metal is selected from the group consisting of a Group IIB, IIIA, VIII, or IVA metal, and a combination thereof.Type: GrantFiled: September 29, 2008Date of Patent: November 23, 2010Assignee: Sabic Innovative Plastics IP B.V.Inventors: Venkata Rama Narayanan Ganapathy Bhotla, Dwairath Dhar, Gurram Kishan, Salkod Parameshwar Mallika
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Patent number: 7709663Abstract: Boron chelate complexes of the general formula are described, where X is either —C(R1R2)— or —C(R1R2)—C(?O)—, in which R1, R2 independently of one another denote H, alkyl (with 1 to 5 C atoms), aryl, silyl or a polymer, and one of the alkyl radicals R1 or R2 may be bonded to a further chelatoborate radical, or X denotes 1,2-aryl with up to two substituents S in the positions 3 to 6 in which S1, S2 independently of one another denote alkyl (with 1 to 5 C atoms), fluorine or a polymer, as well as M+ denotes Li+, Na+, K+, Rb+, Cs+ or [(R3R4R5R6)N]+ or H+, where R3, R4, R5, R6 independently of one another denote H or alkyl with preferably 1 to 4 C atoms.Type: GrantFiled: February 16, 2006Date of Patent: May 4, 2010Assignee: Chemetall GmbHInventors: Ulrich Wietelmann, Uwe Lischka, Klaus Schade, Jan-Christoph Panitz
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Publication number: 20100081829Abstract: A method for producing a phenolphthalein compound comprises: reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group; and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises, on a porous support, a calcination product of a heteropolyacid composition.Type: ApplicationFiled: September 29, 2008Publication date: April 1, 2010Inventors: Venkata Rama Narayanan Ganapathy BHOTLA, Shivappa Basappa HALLIGUDI, Gurram KISHAN, Salkod Parameshwar MALLIKA, Bhaskar VELDURTHY
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Publication number: 20100081831Abstract: A method for producing a phenolphthalein compound is disclosed, comprising: reacting a phenolic compound of the formula: wherein Ra is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of an ionic liquid catalyst composition and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each Ra is independently a hydrogen or a C1-C12 hydrocarbyl group, and Rb is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the ionic liquid catalyst composition comprises a combination of an ionic liquid and a metal halide wherein the metal is selected from the group consisting of a Group IIB, IIIA, VIII, or IVA metal, and a combination thereofType: ApplicationFiled: September 29, 2008Publication date: April 1, 2010Inventors: Venkata Rama Narayanan Ganapathy BHOTLA, Dwairath DHAR, Gurram KISHAN, Salkod Parameshwar MALLIKA
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Publication number: 20100081828Abstract: A method of producing a phenolphthalein comprises reacting a phenolic compound of the formula: wherein R1 is a hydrogen or a C1-C12 hydrocarbyl group, with a phthalic anhydride compound of the formula: wherein R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen, in the presence of a heterogeneous catalyst and a promoter to form a reaction mixture comprising a phenolphthalein compound of the formula: wherein each R1 is independently a hydrogen or a C1-C12 hydrocarbyl group, and R2 is a hydrogen, a C1-C12 hydrocarbyl group, or a halogen; wherein the heterogeneous catalyst comprises a metal oxide composition in combination with a porous support, wherein the metal is molybdenum, tungsten, or a combination comprising at least one of the foregoing metals.Type: ApplicationFiled: September 29, 2008Publication date: April 1, 2010Inventors: Venkata Rama Narayanan Ganapathy BHOTLA, Shivappa Basappa HALLIGUDI, Gurram KISHAN, Salkod Parameshwar MALLIKA, Bhaskar VELDURTHY
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Patent number: 7683187Abstract: The present invention relates to a process for preparing a lactone. The process comprises the steps of reacting an aldehyde with an organic halide in a carbon chain extension reaction to form an alcohol compound comprising a functional group capable of allowing for carbonylation of said alcohol compound, and then reacting said alcohol compound in a carbonylation reaction to form an hydroxycarboxylic acid; and cyclizing the hydroxycarboxylic acid to produce the lactone.Type: GrantFiled: April 20, 2007Date of Patent: March 23, 2010Assignee: Danisco A/SInventors: Lars Wiebe, Thomas Schmidt
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Patent number: 7408016Abstract: A composition comprising a polycarbonate, wherein the polycarbonate has a weight average molecular weight of greater than 15,000, comprises more than 15 mole percent structural units derived from a 2-aryl-3,3-bis(4-hydroxyaryl)phthalimide: wherein R1 is selected from the group consisting of aryl groups having 6 to 25 carbon atoms and aralkyl groups having 7 to 25 carbon atoms, and R2 is selected from the group consisting of a hydrogen, a hydrocarbyl group, and a halogen; and further wherein the polycarbonate has a yellowness index of less than 10 as measured on a 3 millimeter thick plaque in accordance with ASTM D1925 is disclosed.Type: GrantFiled: October 31, 2005Date of Patent: August 5, 2008Assignee: SABIC Innovative Plastics IP B.V.Inventors: Gautam Chatterjee, Anantharaman Dhanabalan, Katherine Glasgow, Vinod Kumar Rai, Suresh Shanmugam, Veeraraghavan Srinivasan
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Publication number: 20080177091Abstract: A phthalic anhydride, a phenol, a catalyst, and a promoter are reacted to form a reaction mixture comprising phenolphthalein. The reaction mixture is treated with a first solvent system to form a slurry. The first solvent system comprises a first polar organic solvent. In some embodiments the first solvent system additionally comprises a non-polar organic solvent. Use of the solvent system to treat the reaction mixture simplifies subsequent purification.Type: ApplicationFiled: January 24, 2007Publication date: July 24, 2008Applicant: GENERAL ELECTRIC COMPANYInventors: Rajshekhar Madhukar Basale, Balakrishnan Ganesan, Ashok S Shyadligeri, Veeraraghavan Srinivasan
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Patent number: 7214823Abstract: Described are tri-, tetra-, and penta-metal complex salts of hydroxycitric acid, compositions containing the same, and methods of making the same, where the salt comprises at least three different metals selected from zinc, magnesium, sodium, potassium, and calcium.Type: GrantFiled: April 13, 2004Date of Patent: May 8, 2007Assignee: Indfrag LimitedInventors: Philip Samuel, Somasundaram Saravanan, Meyyappan Thangaraj
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Patent number: 7135577Abstract: Disclosed herein is a method for producing a 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. The method comprises forming a reaction mixture comprising at least one substituted or unsubstituted phenolphthalein compound, at least one substituted or unsubstituted primary hydrocarbyl amine, and an acid catalyst; and heating the reaction mixture to form 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. An adduct of the 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine is formed either by using an excess of the primary hydrocarbyl amine in the first heating step, or by isolating crude 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine after the heating step and then reacting with a further amount of the primary hydrocarbyl amine. The 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine has a formula: where R1 is selected from the group consisting of a hydrogen and a hydrocarbyl group, and R2 is selected from the group consisting of a hydrogen, a hydrocarbyl group, and a halogen.Type: GrantFiled: June 28, 2004Date of Patent: November 14, 2006Assignee: General Electric CompanyInventors: Vinod Kumar Rai, Radhakrishna Srinivasarao Arakali
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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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Patent number: 6479704Abstract: The present invention relates to an improved for the hydrogenation of an immiscible mixture of an organic reactant in water. The immiscible mixture can result from the generation of water by the hydrogenation reaction itself or, by the addition of, water to the reactant prior to contact with the catalyst. The improvement resides in effecting the hydrogenation reaction in a monolith catalytic reactor from 100 to 800 cpi, at a superficial velocity of from 0.1 to 2 m/second in the absence of a cosolvent for the immiscible mixture. In a preferred embodiment, the hydrogenation is carried out using a monolith support which has a polymer network/carbon coating onto which a transition metal is deposited.Type: GrantFiled: April 20, 2001Date of Patent: November 12, 2002Assignee: Air Products and Chemicals, Inc.Inventors: Andrew Francis Nordquist, Frederick Carl Wilhelm, Francis Joseph Waller, Reinaldo Mario Machado
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Publication number: 20020019545Abstract: Lactone compounds of formula (1) are useful as monomers to form base resins for use in chemically amplified resist compositions adapted for micropatterning lithography.Type: ApplicationFiled: May 31, 2001Publication date: February 14, 2002Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Takeshi Kinsho, Koji Hasegawa, Takeru Watanabe, Tsunehiro Nishi, Mutsuo Nakashima, Seiichiro Tachibana, Jun Hatakeyama
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Patent number: 5997891Abstract: This invention relates to novel compositions containing temporary visual indicators and methods for using these compositions. Specifically, this invention relates to a sunscreen composition containing an indicator that is visible when the substance is applied to the skin, but becomes invisible shortly after application. The continued presence of the indicator allows the indicator to be reactivated temporarily to the visible form so that a user can verify the presence of the sunscreen. The visible indicator ensures that the sunscreen is applied evenly and completely to the area to be protected, but becomes invisible so as not to interfere with the action of the sunscreen or discolor the skin.Type: GrantFiled: August 18, 1998Date of Patent: December 7, 1999Assignee: IPA, LLCInventors: Ronnie S. Fuerst, Richard Melker, Christopher D. Batich
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Patent number: 5886196Abstract: Hydrogen bis(oxalato)borate of the formula ##STR1## is used as a protonic acid catalyst in condensation reactions, such as Friedel-Crafts condensations, vinyl ether condensations of acetals with vinyl or propenyl ethers and acylations of phenols. The products of such condensations are, for example, dihydro-vitamin K.sub.1 monobenzoate, d,l-.alpha.-tocopherol, various intermediates in the synthesis of carotenoids as well as d,l-.alpha.-tocopherol acetate. As a result of the use in accordance with the invention of hydrogen bis(oxalato)borate various disadvantages associated with the use of other protonic acid catalysts, e.g. problems with corrosion, toxicity and environmental contamination, are avoided. The novel catalyst has advantages with respect to selectivity, yields, amounts required as well as working up after completion of the respective condensation.Type: GrantFiled: December 18, 1996Date of Patent: March 23, 1999Assignee: Roche Vitamins Inc.Inventor: Claude Furbringer
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Patent number: 5837645Abstract: This invention relates to novel compositions containing temporary visual indicators and methods for using these compositions. Specifically, this invention relates to a sunscreen composition containing an indicator that is visible when the substance is applied to the skin, but becomes invisible shortly after application. The continued presence of the indicator allows the indicator to be reactivated temporarily to the visible form so that a user can verify the presence of the sunscreen. The visible indicator ensures that the sunscreen is applied evenly and completely to the area to be protected, but becomes invisible so as not to interfere with the action of the sunscreen or discolor the skin.Type: GrantFiled: July 1, 1996Date of Patent: November 17, 1998Inventors: Ronnie S. Fuerst, Richard Melker, Christopher D. Batich
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Patent number: 5532029Abstract: This invention relates to novel compositions containing temporary visual indicators and methods for using these compositions. Specifically, this invention relates to a sunscreen composition containing an indicator that is visible when the substance is applied to the skin, but becomes invisible shortly after application. The continued presence of the indicator allows the indicator to be reactivated temporarily to the visible form so that a user can verify the presence of the sunscreen. The visible indicator ensures that the sunscreen is applied evenly and completely to the area to be protected, but becomes invisible so as not to interfere with the action of the sunscreen or discolor the skin.Type: GrantFiled: February 14, 1995Date of Patent: July 2, 1996Inventors: Ronnie S. Fuerst, Richard Melker, Christopher D. Batich
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Patent number: 5231195Abstract: Phenolphthaleinic bis(acrylate), phenolphthaleinic bis(methacrylate), and phenolphthaleinic (acrylate) (methacrylate) may be polymerized to form polymerizates especially useful for lenses and lens blanks.Type: GrantFiled: November 18, 1992Date of Patent: July 27, 1993Assignee: PPG Industries, Inc.Inventors: Vaikunth S. Prabhu, Charles R. Coleman
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Patent number: 5210232Abstract: Pyran-containing phthalides of the formula ##STR1## in which R is hydrogen, alkyl which has not more than 12 carbon atoms and is unsubstituted or substituted by halogen, cyano, hydroxyl or lower alkoxy, or is cycloalkyl, phenalkyl or phenyl each of which is unsubstituted or substituted, or an unsubstituted or substituted heterocyclic radical, R' is hydrogen, or R together with R' is C.sub.2 -C.sub.3 alkylene which is unsubstituted or substituted by methyl,X is hydrogen, alkyl having 1 to 12 carbon atoms or a monocyclic or polycyclic aromatic or heteroaromatic radical and the ring A is a benzene or naphthalene ring which is unsubstituted or monosubstituted or polysubstituted by halogen, lower alkyl, lower alkoxy or lower alkoxycarbonyl, and the ring B is an aromatic or heteroaromatic radical which has 6 ring atoms and which can contain an aromatic fused ring, it being possible for both the ring B and the fused ring to be substituted.Type: GrantFiled: January 2, 1992Date of Patent: May 11, 1993Assignee: Ciba-Geigy CorporationInventor: Rox Phaff
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Patent number: 5011967Abstract: Bischloroformate oligomer compositions are prepared by passing phosgene into a heterogeneous aqueous-organic mixture containing at least one dihydroxyaromatic compound, with simultaneous introduction of a base at a rate to maintain a specific pH range and to produce a specific volume ratio of aqueous to organic phase. By this method, it is possible to employ a minimum amount of phosgene. The reaction may be conducted batchwise or continuously. The bischloroformate composition may be employed for the preparation of cyclic polycarbonate oligomers or linear polycarbonate, and linear polycarbonate formation may be integrated with bischloroformate composition formation in a batch or continuous process.Type: GrantFiled: December 4, 1987Date of Patent: April 30, 1991Assignee: General Electric CompanyInventors: James M. Silva, Robert A. Pyles
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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: 4855460Abstract: A process for the preparation of perfluoroalkylated ketones and/or perfluoroalkylated alcohols, comprising the step of contacting a perfluoroalkyl iodide or perfluoroalkyl bromide with an acid anhydride, in the presence of a metal chosen from zinc and cadmium.Type: GrantFiled: July 11, 1988Date of Patent: August 8, 1989Assignee: Rhone-Poulenc ChimieInventors: Marc Tordeux, Claude Wakselman, Catherine Francese
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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: 4695648Abstract: A compound having a potentially inhibitory effect on 15-hydroxy-prostaglandin dehydrognase (PGDH) and having the formula ##STR1## in which R.sub.1 and R.sub.2 are hydrogen or lower alkyl;R.sub.3 is hydrogen, lower alkyl or substituted or unsubstituted phenyl;R.sub.4, R.sub.5, and R.sub.6 are hydrogen, halogen, lower alkyl, lower alkoxy, cyano, carboxy or nitro; at least one of the groups R.sub.4 to R.sub.6 being hydrogen;R.sub.7 to R.sub.11 are hydrogen, halogen, cyano, lower alkyl, trifluoromethyl, lower alkoxy, hydroxy, lower acyl, lower alkoxycarbonyl, N,N,-diloweralkyl-aminocarbonyl or N,N-loweralkylene-aminocarbonyl; and R.sub.8 and R.sub.10 may in addition be carboxy; at least two of R.sub.7 to R.sub.11 always being hydrogen; and--A-- is --CO--, --CH.sub.2 --CO--, --CH.dbd.CH--, --CH.dbd.CH--CO-- or corresponding groups in which a hydrogen atom is replaced by a lower alkyl group.The invention comprises also lactones of those compounds in which R.sub.Type: GrantFiled: August 29, 1985Date of Patent: September 22, 1987Assignee: Pharmacia ABInventors: Karl H. Agback, Tamara Agback, Alf S. Nygren
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Patent number: 4588744Abstract: There is disclosed a method and composition of matter for treating mammalian inflammatory viral infections, acne, dermatitis, and arthritic conditions comprising the application of 3,3-Bis(p-hydroxyphenyl)-phthalide (phenolphthalein) by itself, or in combination with a carrier, or in a mixture with a bicarbonate salt of Group I of the Periodic Table, or in combination with both a carrier and bicarbonate salt. These mixtures can be anhydrous or aqueous solutions and can be applied either by injection, ingestion, or topically.Type: GrantFiled: January 27, 1981Date of Patent: May 13, 1986Inventor: John E. McHugh
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Patent number: 4535090Abstract: 3,5-diphenyl-1H-1,2,4-triazoles with contragestational activity of the following formula ##STR1## wherein R may be located on one or the other of the two adjacent nitrogen atoms and may represent hydrogen or a group R.sub.5 CO-- wherein R.sub.5 is an aliphatic saturated or unsaturated hydrocarbyl containing from 1 to 20 carbon atoms, R.sub.1, R.sub.2 and R.sub.3, each independently are selected from hydrogen, lower alkyl and lower alkoxy or R.sub.2 and R.sub.3 together may represent a methylenedioxy group, and R.sub.4 is an aliphatic saturated or unsaturated hydrocarbyl group of from 1 to 20 carbons, with the proviso that when R is hydrogen or an R.sub.5 CO-- group wherein R.sub.5 contains 4 or less carbon atoms, R.sub.4 must contain 5 or more carbons.These compounds have proven to be highly effective in terminating pregnancy in several animal species after a single parenteral injection.Type: GrantFiled: October 15, 1982Date of Patent: August 13, 1985Assignee: Gruppo Lepetit S.p.A.Inventors: Giulio Galliani, Amedeo Omodei-Sale, Pietro Consonni, Alessandro Assandri
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Patent number: 4520208Abstract: An aromatic polyester comprising two structural units represented by the following formulas A and B in a molar ratio of the structural unit A to the structural unit B being from 70:30 to 90:10 or four structural units represented by the following formulas A, B, C and D in a molar ratio of the total of the structural units A and C to the total of the structural units B and D being from 10:90 to 95:5 and the total of the structural units C and D being less than 50 molar %, and having a reduced viscosity .eta.sp/C of from 0.6 to 4 dl/g as measured at 30.degree. C. at a concentration of 1.Type: GrantFiled: June 17, 1983Date of Patent: May 28, 1985Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Masahiro Hayashi, Seiichi Nozawa, Takashi Oikawa
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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: 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