baber/WOPTO huggingface dataset:
Patent BR-0312925-A (BR)
Title: Processo de conectar plástico a uma seção de metal e peça fabricada por meio deste
Inventor: STAARGAARD JAMES E
IPC: B60R13/00
Filed: 2003-07-25
Abstract: "PROCESSO DE CONECTAR PLáSTICO A UMA SEçãO DE METAL E PEçA FABRICADA POR MEIO DESTE". A presente invenção refere-se um processo de conectar um plástico a um substrato de metal e uma peça feita por meio deste processo. é provida uma seção de metal hidroformado que apresenta aberturas superior e inferior. Um componente de plástico é moldado em torno do componente de metal e através da abertura inferior. O componente de plástico inclui um flange em um lado do mesmo para prender o componente de plástico com o componente de metal.
Patent BR-0314481-A (BR)
Title: Método de produção de uma composição enriquecida com isoquercitrina, composição enriquecida com isoquercitrina e processo para a preparação de uma composição enriquecida com rutina de biomassa que contém rutina
Inventor: CHANG PETER R
IPC: A61Q17/04
Filed: 2003-09-23
Abstract: "MéTODO DE PRODUçãO DE UMA COMPOSIçãO ENRIQUECIDA COM ISOQUERCITRINA, COMPOSIçãO ENRIQUECIDA COM ISOQUERCITRINA E PROCESSO PARA A PREPARAçãO DE UMA COMPOSIçãO ENRIQUECIDA COM RUTINA DE BIOMASSA QUE CONTéM RUTINA". Trata-se de um processo para a preparação de uma composição enriquecida com rutina de biomassa de planta, o qual compreende a extração com uma solução aquosa e a precipitação. Um preparado de enzima, tal como a naringinase, é utilizado para a transformação da rutina em composições de valor mais elevado que contêm proporções aumentadas de isoquercitrina e quercetina.
Patent BR-0314733-A (BR)
Title: Processo para reduzir o odor desagradável e sistema para reduzir o odor desagradável em um artigo para cuidado pessoal
Inventor: KRAUTKRAMER PATSY A
IPC: A61L9/014
Filed: 2003-06-10
Abstract: "PROCESSO PARA REDUZIR O ODOR DESAGRADáVEL E SISTEMA PARA REDUZIR O ODOR DESAGRADáVEL EM UM ARTIGO PARA CUIDADO PESSOAL". Processo e sistema (22) para reduzir o odor desagradável incluindo a provisão de uma quantidade operante de partículas de material adsorvente com uma estrutura transportadora (24) e configuração da estrutura transportadora para contatar pelo menos um líquido corpóreo viscoso, aquoso durante uso pretendido da estrutura transportadora. A estrutura transportadora (24) tendo sido configurada para reduzir o odor desagradável do líquido corpóreo viscoso. Nas concretizações específicas, as partículas de material adsorvente (28) tendo sido configuradas para incluir uma quantidade total de poros de partícula e pelo menos uma porção significativa de poros de partícula tendo sido configurada para prover uma quantidade operante de poros alvo. Em outras concretizações, os poros alvo foram configurados para retirar e manter água do líquido corpóreo, tendo sido configurados para manter a água de modo a tornar a mesma substancialmente inacessível aos organismos que causam o odor. Pm uma concretização adicional, os poros alvo podem ser configurados para prover um tamanho de poro alvo selecionado. Ainda em outra concretização, as partículas de material adsorvente podem ser configuradas para transportar uma quantidade operante de material de tratamento de odor.
Patent BR-0314808-A (BR)
Title: Tampões de ouvido e método de formação dos mesmos
Inventor: LIGON JAMES T SR
IPC: A61F11/08
Filed: 2003-09-09
Abstract: "TAMPõES DE OUVIDO E MéTODO DE FORMAçãO DOS MESMOS". Um processo para a formação de um tampão de ouvido de termoplástico de espuma, que compreende as etapas de extrusão de um corpo de espuma (10) de material termoplástico, para a formação de uma extrusão (24); conformação do material termoplástico de espuma em uma máquina de conformação adequada (26) e separação pelo menos parcial do material conformado resultante com um cortador adequado (34) para a formação dos tampões de ouvido individuais.
Patent BR-0317306-A (BR)
Title: Freio da caixa de câmbio acionável eletromagneticamente
Inventor: RENNER STEFAN
IPC: F16D65/18
Filed: 2003-12-03
Abstract: "FREIO DA CAIXA DE CâMBIO ACIONáVEL ELETROMAGNETICAMENTE". A presente invenção refere-se a um freio da caixa de câmbio (1), com o qual um eixo da caixa de câmbio (3) pode ser freado, por exemplo, para a realização de um processo de engate superior. A tarefa da invenção consiste no fato de apresentar um freio da caixa de câmbio, que seja equipado sem dispositivos de acionamento hidráulicos ou pneumáticos, e, além disso, que necessite somente de muito pouco espaço de construção axial. De acordo com a invenção, um freio da caixa de câmbio (1) desse tipo dispõe de um dispositivo de acionamento (6, 7; 8) eletromagnético, com o qual os elementos de fricção (4, 5) do freio da caixa de câmbio (1) podem ser pressionados um no outro, para o acionamento do freio.
Patent BR-0317841-A (BR)
Title: Correia para processo e método para a produção de uma correia para processo
Inventor: DAVIS TRENT
IPC: B32B5/02
Filed: 2003-11-17
Abstract: "CORREIA PARA PROCESSO E MéTODO PARA A PRODUçãO DE UMA CORREIA PARA PROCESSO". Método para produzir uma correia para prensa de sapara para a fabricação de papel ou outra correia para processo industrial e uma correia feita de acordo com tal método. A correia é produzida através de distribuição de uma mistura de polímero e fibra solta sobre um mandril cilíndrico, através de extrusão ou através de co-extrusão. De preferência, a variação da concentração e/ou orientação da fibra solta dentro do polímero é controlada de modo que a correia acabada tem propriedades desejadas.
Patent BR-8000946-A (BR)
Inventor: GILL P
IPC: F01L1/22
Filed: 1980-02-15
Abstract: An automatic tappet adjuster for a valve operating mechanism has two components 12, 14 with co-operating buttress thread form screw threads 32. The axial free play in the threads 32 sets the valve clearance. Excess clearance 56 is taken up by movement of one component, 14 acted on by a spring 40, relative to the other component 12. The buttress thread form 32 exhibits higher friction against rotation in one direction than in the other.
Patent BR-8005978-A (BR)
Inventor: BAUMERT J
IPC: C21C5/30
Filed: 1980-09-18
Abstract: A steel refining system has a crucible having an upwardly open mouth and containing a steel melt covered by slag, an oxygen lance directed downwardly into the mouth at the melt, a hood fitting downwardly over the mouth and having a hood wall formed by a multiplicity of coolant tubes, and an arrangement for circulating a coolant through these tubes. The tubes form a tubular hood-wall extension that has an outer end and is centered on an axis trained on the melt on the crucible. A holder is mounted on the outer end of this extension and contains a sound transducer carried by the holder and directed along the axis at the melt. A circuit is connected to this transducer for determining slag thickness by means of the sound detected by the transducer. The holder itself comprises a circularly annular hollow cell fixed by means of a collar to the extension and a transducer housing that is fixed to this cell and therethrough to the extension. The cell defines a passage aligned with the axis and is connected to a separate coolant circuit to prevent overheating of the transducer.
Patent BR-8207961-A (BR)
Inventor: SHAW HERBERT JOHN
IPC: G01C19/00
Filed: 1982-11-05
Abstract: A fiber optic rotation sensor utilizes multimode optical fiber to improve power coupling and reduce coherent back scattering. A multimode light source such as a light emitting diode can be used. The system is economical and environmentally stable.
Patent BR-8300569-A (BR)
Inventor: MAY ADOLF
IPC: C11D1/645
Filed: 1983-02-04
Abstract: Concentrated fabric softeners consisting substantially of 12 to 50 weight % of a quaternary ammonium compound customary for softeners, 2 to 20 weight of a fatty amine polyglycol ether of the formulae <IMAGE>  (IV)  in which R1 is alkyl or alkenyl having from 8 to 22, preferably 16 to 18, carbon atoms, x and y each are hydrogen or methyl with the proviso that x and y are not simultaneously methyl, n1 and n2 together are an integer of from 2 to 50, preferably 25, and p and m either are simultaneously zero, or p is 1 and m is 1, 2 or preferably 3, 3 to 30 weight % of a C1-C3 alcohol, an acid in an amount which is equimolar to component (b), and water and optionally further usual auxiliaries in amounts remaining to complete 100%.
Patent BR-8503427-A (BR)
Inventor: NOVAK RONALD WILLIAM
IPC: C08F4/00
Filed: 1985-07-18
Abstract: Aldehydes and/or imines of the formula  R3Qn wherein n is 1-4; R3 is an organic radical having a valence of 1-4 or hydrogen; Q is of the formula <CHEM> wherein A is O or NR4; R1, R2, and R4 are independently selected C1-6 alkyl or aryl radicals or mixtures thereof are useful, especially in mixtures with transition metal ions selected from Co<+><+>, Cu<+><+> and Mn<+><+>, as oxygen scavengers in the curing of monomers, oligomers and polymers containing vinyl unsaturation which is inhibited by the presence of oxygen. A preferred composition is a mixture of aldehydes which are the reaction product of (a) ethylene urea, (b) formaldehyde, (c) isobutyraldehyde, and (d) 2-ethylhexanal in a molar ratio of (a):(b) of 1:2 and of (a) to the sum of (c) and (d) of 1:2.
Patent BR-8701747-A (BR)
Inventor: GRAG GUENTER DR
IPC: F16J15/32
Filed: 1987-04-13
Abstract: In a method for manufacturing a sealing ring with a sealing lip, the material forming the sealing lip is fabricated in plastically deformable condition into the shape of a column-like hollow body. Prior to solidification, the column-like hollow body is twisted between axially spaced cross-sectional planes. This forms return elements with hydrodynamic action. Subsequently, the hollow body is solidfied and its diameter is enlarged axially outside the region of the sealing lip and it is then secured in a sealing ring housing.
Patent BR-8703542-A (BR)
Inventor: DEHENNAU CLAUDE
IPC: A61J1/00
Filed: 1987-07-10
Abstract: 1. Flexible thermoplastic structures with multiple coextruded polymeric layers comprising a vinylidene chloride copolymer layer bonded to a plasticized vinyl chloride polymer layer, characterized in that the vinylidene chloride copolymer layer is bonded to the plasticized vinyl chloride polymer layer through the intermediacy of a mixture of polymeric adhesives consisting of 10 to 90 parts by weight of a copolymer of vinyl acetate and ethylene and of 90 to 10 parts by weight of a copolymer of vinyl chloride and vinyl acetate and whose shear elastic modulus G' at 121 degrees C and 10**-4 cycles/second is greater than 0.5 10**3 Pa.
Patent BR-8703883-A (BR)
Inventor: BIGGS IAN STEDMAN
IPC: B32B5/26
Filed: 1987-07-27
Abstract: A method of making laminated reinforced thermoplastic sheets which includes preparing first and second porous sheets each comprising 20% to 60% by weight of reinforcing fibres having a high modulus of elasticity as herein defined and 40% to 80% by weight of a thermoplastics material differing from the thermoplastic material in the other sheet and applying heat and pressure to cause the sheets to consolidate and adhere together to form a laminate.
Patent BR-8704839-A (BR)
Inventor: PETTMAN ROGER BRUCE
IPC: A01N43/84
Filed: 1987-09-21
Abstract: Fungicidal compositions comprise at least one morpholine-type fungicide and at least one imidazole derivative of general formula (I):- <CHEM> or a salt thereof; where R represents an optionally substituted phenyl group, R<1> represents an optionally substituted alkyl, cycloalkyl, alkenyl, aryl or aralkyl group, R<2> represents an optionally substituted alkyl, cycloalkyl, cycloalkylalkyl, alkenyl, alkynyl, aryl or aralkyl group, and X represents an oxygen or sulphur atom or a group -NR<3>-, where R<3> represents a hydrogen atom or an optionally subtituted alkyl group or R<2> and R<3> together with the interjacent nitrogen atom represent a 5- or 6- member saturated or unsaturated heterocyclic ring optionally containing one or two further heteroatoms. The compositions are particularly useful in combating wheat leaf spot and powdery mildews.
Patent BR-8706325-A (BR)
Inventor: LISLE RONALD J
IPC: G06F5/00
Filed: 1987-11-24
Abstract: A text compression method and apparatus are disclosed that enable overall compression ratios of more than six or eight to one for normal language text. Plural multiple-word dictionaries that are specialized for the particular field of use are employed together with a header transmission format that identifies which dictionaries are to be used. In addition, entries in these dictionaries are categorized by a weighted frequency of use ranking in which the product of the word length in characters and the frequency of occurrence of that word in the text is taken as the weighted figure of merit for ranking words to be placed in the individual dictionaries.
Patent BR-8807758-A (BR)
Inventor: HUNT WILLIAM JOSEPH
IPC: A47G25/44
Filed: 1988-10-21
Abstract: PCT No. PCT/GB88/00919 Sec. 371 Date Apr. 17, 1990 Sec. 102(e) Date Apr. 17, 1990 PCT Filed Oct. 21, 1988 PCT Pub. No. WO89/03652 PCT Pub. Date May 5, 1989.The garment hanger is disclosed having a body and a hook mounted on the body to suspend the hanger on a rail. A movable arm is conveniently slidably mounted in the body for free movement in at least one direction, preferably the outward direction. A locking device is mounted on the body to lock the movable arm relative to the body against movement in an inwardly direction preferably by the interengagement of teeth on the locking device with ratchet teeth along the top edge of the corresponding movable arm. The locking means is releasable by a lever mechanism operated remotely from the locking device to allow free movement of the arm in either an outward or inward direction. Conveniently, the releasable lever mechanism is mounted on a garment engagable portion at the outermost end of the movable arm. In one preferred embodiment of a garment hanger two arms are slidably simultaneously in the hanger body in mutually opposite directions, and the locking means is mounted for engagement with one of the movable arms.
Patent BR-9100863-A (BR)
Inventor: HAUSER THOMAS WILHELM
IPC: A23L7/109
Filed: 1991-03-04
Abstract: In order to prepare dried pasta, the pasta is formed from a mixture of water and ground cereal, the pasta thus formed is given a preliminary heat treatment, then it is precooked and dried.
Patent BR-9101912-A (BR)
Inventor: SCHELL LONI
IPC: C09K23/42
Filed: 1991-05-09
Abstract: The invention relates to a fountain solution or fountain solution concentrate for use in offset printing. The ready-for-use product contains 0.001 to 0.08% by weight of at least one alkanol or alkenol or of an alkanediol or alkenediol having 5 to 15 carbon atoms, which has been converted with ethylene oxide and/or propylene oxide into polyether structures having 3 to 12 ethylene oxide and/or propylene oxide units.
Patent BR-9103761-A (BR)
Inventor: PAYNE DONALD N JR
IPC: C08L23/00
Filed: 1991-08-30
Abstract: A lubricious polymeric composition which is stable toward sterilizing radiation includes a semicrystalline polyolefin of narrow molecular weight distribution having incorporated therein a liquid mobilizing additive, a radiation stabilizing amount of a hindered amine, a lubricating amount of an erucic acid derivative and a clarifying amount of a sorbitol derivative. The invention includes a sterilized article fabricated from the composition and a method to radiation sterilize the article.
Patent BR-9106882-A (BR)
Inventor: ROGERS BRIAN A
IPC: B26B21/44
Filed: 1991-09-20
Abstract: A shaving unit comprises at least one blade and a shaving composite that has a surface for engaging the user's skin adjacent the blade edge. The shaving unit may be of a disposable cartridge type adapted for coupling to and uncoupling from a razor handle or may be integral with a handle so that the complete razor is discarded as a unit when the blade or blades become dulled. The blade edge (or edges) cooperate with skin engaging surfaces to define shaving geometry. The shaving aid composite is a mixture of water insoluble matrix material, an effective amount of shaving aid material, and a water soluble low molecular weight release enhancing agent that enhances the releasability of the shaving aid material from the matrix material.
Patent BR-9302449-A (BR)
Inventor: VONKEMAN KOERT ALENXANDER
IPC: C01B32/40
Filed: 1993-06-23
Abstract: A process for the catalytic partial oxidation of a hydrocarbon feedstock comprises contacting a feed comprising the hydrocarbon feedstock, an oxygen-containing gas and, optionally, steam at an oxygen-to-carbon molar ratio in the range of from 0.45 to 0.75, at elevated pressure with a catalyst in a reaction zone under adiabatic conditions, which catalyst comprises a metal selected from Group VIII of the Periodic Table supported on a carrier and which catalyst is retained within the reaction zone in a fixed arrangement having a high tortuosity. The fixed arrangement of the catalyst is preferably a fixed bed of a particulate catalyst or a ceramic foam.
Patent BR-9307779-A (BR)
Inventor: PLEHN JUERGEN DR
IPC: H04Q7/20
Filed: 1993-10-15
Abstract: PCT No. PCT/EP93/02846 Sec. 371 Date Sep. 29, 1995 Sec. 102(e) Date Sep. 29, 1995 PCT Filed Oct. 15, 1993 PCT Pub. No. WO94/17640 PCT Pub. Date Aug. 4, 1994In a process of allocating frequencies to base stations of a mobile radiotelephone network, which process is based on input information containing at least the number of frequencies required for each base station, the frequencies permissible in the mobile radiotelephone network and information on possible disturbance effects among the base stations in the case of identical and/or adjacent frequencies, the following steps are executed alternatingly: (a) selection of a base station from the number of those base stations to which not all contemplated frequencies have yet been allocated, according to a first base station selection criterion and, if necessary, further base station selection criteria, (b) selection of a frequency according to a first frequency selection criterion and, if necessary, further frequency selection criteria, (c) identification of the frequency from (b) as allocated to the base station from (a).
Patent BR-9508347-A (BR)
Inventor: POWELL RICHARD LIEWELLYN
IPC: C09K5/04
Filed: 1995-07-24
Abstract: A composition for use in a heat transfer device such as a refrigeration or air conditioning system is described which comprises: (A) at least one hydrofluorocarbon selected from the group consisting of difluoromethane (R-32) and 1,1,1-trifluoroethane (R-143a), (B) pentafluoroethane (R-125), (C) at least one hydrocarbon, and optionally (D) at least one hydrofluorocarbon selected from the group consisting of 1,1,1,2-tetrafluoroethane (R-134a) and 1,1,2,2-tetrafluoroethane (R-134).
Patent BR-9600279-A (BR)
Inventor: KAWAMURA MAKOTO
IPC: H04N19/44
Filed: 1996-01-31
Abstract: A method of and apparatus for reverse playback, slow-reverse playback, and frame-by-frame-reverse playback of a time-division-multiplexed signal is compatible with fixed-rate and variable-rate data compression schemes, including digital video signals encoded according to MPEG systems. <IMAGE>
Patent BR-9611623-A (BR)
Inventor: PANACCIO MICHAEL
IPC: A61K31/70
Filed: 1996-11-29
Abstract: The present invention relates generally to therapeutic compositions for the treatment and/or prophylaxis of intestinal disease conditions in animals and birds caused or exacerbated by Lawsonia intracellularis or similar or otherwise related microorganism. The present invention also contemplates methods for the treatment and/or prophylaxis of such intestinal disease conditions and to diagnostic agents and procedures for detecting Lawsonia intracellularis or similar or otherwise related microorganism.
Patent BR-9704093-A (BR)
Title: Sistema de mensagem em espera em ligaçõestelefÈnicas
Inventor: LOUREIRO MAURO RICARDO BRAS
IPC: H04M3/50
Filed: 1997-08-13
Abstract: "SISTEMA DE MENSAGEM EM ESPERA EM LIGAçõESTELEFÈNICAS". A presente invenção é uma solução paraproblemas de geração de mensagens em espera para centraistelefónicas privadas. O dito sistema deve ser ligado a uma CentralTelefónica Privada (A). Ele é constituído por um Microcontrolador(1) que acessa um Cartucho de Memória (2) lendo byte a byte amensagem previamente gravada nesta memória. OMicrocontrolador (1) envia ainda estes bytes a um Decodificador(3) que decodifica, descompacta, filtra e converte de digital paraanalógico o sinal de áudio. Este sinal analógico vai para umControle de Volume (4) e em seguida para um Amplificador deáudio (5) que amplifica o sinal antes de entregá-lo à CentralTelefónica Privada (A). O Cartucho de Memória (2) é montado emum invólucro removível de fácil acesso de forma a permitir que amensagem seja facilmente regravada ou substituída.
Patent BR-9706142-A (BR)
Inventor: BRENDEL JOACHIM
IPC: C07D311/70
Filed: 1997-12-15
Abstract: N-(Bicyclic aryl or heteroaryl)-sulphonamide or sulphamide derivatives of formula (I) and their salts are new: X = O, S, SO, SO2, NR7, CR'8R"8 or C=O; R7 = H or -CaH2a-R9, where one CH2 is optionally replaced by O, CH=CH, C  IDENTICAL  C, CO, CO2, OCO, S, SO, SO2, NR10 or CONR10; R10 = H or A; a = 0-8; R9 = H, CF3, C2F5, C3F7, 3-8 C cycloalkyl, NMe2, NEt2, 1-piperidyl, pyrrolidino, morpholino or 4-methyl-piperazin-1-yl, pyridyl, thienyl, imidazolyl or phenyl (the latter four all optionally substituted by 1 or 2 F, Cl, Br, I, CF3, NO2, CN, NH2, OH, Me, Et, OMe, NMe2, SO2NH2, SO2Me and NHSO2Me); or R1+R7 = bond; R'8 = H, CF3, C2F5, C3F7, 1-6 C alkyl or phenyl (optionally substituted by 1 or 2 F, Cl, Br, I, CF3, NO2, CN, NH2, OH, Me, Et, OMe, NMe2, SO2NH2, SO2Me and NHSO2Me); R"8 = H, A, OR10, CO2R10 or COR10; R10 = H or A; or R'8+R1 or R"8+R1 = bond if Y = N; Y = N or CR11; R11 = H or A; R1, R2 = H, CF3, C2F5, C3F7, F, Cl, OMe, 1-6 C alkyl or phenyl (optionally substituted by 1 or 2 F, Cl, Br, I, CF3, NO2, CN, NH2, OH, Me, Et, OMe, NMe2, SO2NH2, SO2Me and NHSO2Me); or CR1R2 = 2-10 C alkylene chain; R3 = R12-CnH2n-N(R13)- or R12-CnH2n-, where one CH2 of CnH2n is optionally replaced by O, CO, S, SO, SO2 or R'10; R'10 = H, Me or Et; R12 = H, Me, 3-8 C cycloalkyl, CF3, C2F5 or C3F7; n = 0-10; R13 = H or 1-6 C alkyl; or R12+R13 = bond if n ≥ 3; or R3+R4 = 3-8 C alkylene chain, where one CH2 is optionally replaced by O, CO, S, SO, SO2 or NR'10; R4 = R14-CrH2r-, where one CH2 of CrH2r is optionally replaced by O, CH=CH, C  IDENTICAL  C, CO, CO2, OCO, S, SO, SO2, NR"10 or CONR"10; R"10 = H or A; R14 = Me, CF3, C2F5, C3F7, 3-8 C cycloalkyl, OH, CO2H, NR23R24, 1-piperidyl, 1-pyrrolidinyl, 4-morpholinyl or 4-methylpiperazin-1-yl, pyridyl, thienyl, imidazolyl or phenyl (the latter four all optionally substituted by 1 or 2 F, Cl, Br, I, CF3, NO2, CN, NH2, OH, Me, Et, OMe, NMe2, SO2NH2, SO2Me and NHSO2Me); R23, R24 = H or A; or NR23R24 = (CH2)k, where one CH2 is optionally replaced by O, S, NH, NMe or N(CH2Ph); k = 4 or 5; r = 0-20; R5+R6 = -CR15=CR16CR17=CR18-, -CR15=CR16CR17=N-, -CR15=CR16N=CR18-, -CR15=N-CR17=N-, -CR15=NN=CR18-, -N=CR16CR17=N- or -SCR15=CR16-, all bonded in either direction; R15-R18 = H, F, Cl, Br, I, 1-5C alkyl, 3-8 C cycloalkyl, CN, CF3, C2F5, C3F7, N3, NO2, -Z-CsH2s-R22, thienyl or phenyl (optionally substituted by 1 or 2 F, Cl, Br, I, CF3, NO2, CN, NH2, OH, Me, Et, OMe, NMe2, SO2NH2, SO2Me and NHSO2Me); Z = O, CO, CO2, OCO, S, SO, SO2, SO2O, SO2NR'"10, NR'"10 or CONR'"10; R'"10 = H or A; s = 0-6; R22 = H, CF3, C2F5, C3F7, 3-8 C cycloalkyl, NR19R20, CO2R21, 1-piperidyl, 1-pyrrolidinyl, 4-morpholinyl or 4-methylpiperazin-1-yl, pyridyl, thienyl, imidazolyl, quinolyl, isoquinolyl or phenyl (the latter six all optionally substituted by 1 or 2 F, Cl, Br, I, CF3, NO2, CN, NH2, OH, Me, Et, OMe, NMe2, SO2NH2, SO2Me and NHSO2Me); R19, R20 = H or A; or NR19R20 = (CH2)k, where one CH2 is optionally replaced by O, S, NH, NMe or N(CH2Ph); R21 = H or A; and A = 1-3 C alkyl; provided that Y is not CR11 if X = O.
Patent BR-9706981-A (BR)
Inventor: BAGLEY MELVIN R
IPC: C25B3/29
Filed: 1997-01-16
Abstract: Electrolytic hydrodimeric coupling of dialkyl maleates in alkanol solutions containing an alkanol-soluble alkali metal acetate/quaternary ammonium tetrafluoroborate mixed supporting electrolyte yields tetraalkyl 1,2,3,4-butanetetracarboxylates.