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| Number | Title | Issue Date |
| 7605290 | Processes for the synthesis of O-desmethylvenlafaxine The present invention describes processes for the preparation of O-desmethylvenlafaxine and tridesmethylvenlafaxine, which may be used as an intermediate in preparing O-desmethylvenlafaxine. ... | 10/20/2009 |
| 7456319 | Para-alkylation of aromatic primary amines A method is provided for producing primarily para alkyl aromatic amines by alkylating a primary aromatic amine with an olefin in the presence of an acid activated clay. ... | 11/25/2008 |
| 7435854 | Methods for preparing O-desmethylvenlafaxine The present invention provides an efficient method of making O-desmethyl-venlafaxine. ... | 10/14/2008 |
| 7390928 | Alkylation of N′-phenyl-N-alkylphenylenediamines in ionic liquid, N′-phenyl-N-alkyl (alkylphenylene) diamines produced thereby, and lubricant compositions containing same A process for alkylation of a N′-phenyl-N-alkyl-p-phenylenediamine of specified formula in an ionic liquid unexpectedly produces a N′-phenyl-N-alkyl(alkylphenylene)diamine of a second specified formula. The use of an inorganic liquid permits convenient separatio... | 06/24/2008 |
| 7390927 | Process for preparing 3-aminophenylacetylenes A process for preparing a 3-aminophenylacetylene compound of formula (5), including: a) reacting a 3-haloaniline compound of formula (1) with an acetylene compound of formula (2) in the presence of a palladium compound, a copper compound, and an amine compound of fo... | 06/24/2008 |
| 7378554 | Ring alkylation of aniline or an aniline derivative using ionic liquid catalysts A process for ring-alkylating aniline or an aniline derivative in which aniline or an aniline derivative is reacted with an alkylating agent in the presence of an ionic liquid which includes a Lewis acid and a quaternary cation, to produce a ring-alkylated alkylanil... | 05/27/2008 |
| 7361788 | Direct alkylation of N-alkyl-N′-phenyl-p-phenylenediamine A single-step process is disclosed for the ring alkylation of at least one N-alkyl-N′-phenyl-phenylenediamine with at least one olefin wherein the process comprises heating a mixture of the N-alkyl-N′-phenyl-phenylenediamine(s) and olefin(s) in the presence of a... | 04/22/2008 |
| 7342133 | Substituted amino compounds as 5-HT/NA uptake inhibitors The invention relates to substituted amino compounds, to processes for their preparation, to pharmaceutical formulations containing these compounds and to the use of these substances in the preparation of pharmaceutical formulations, especially for the treatment or ... | 03/11/2008 |
| 7253321 | Process for the preparation of polyamines of the diphenylmethane series at a low degree of protonation The invention provides a process for the preparation of polyamines of the diphenylmethane series. This process comprises a) reacting aniline and formaldehyde in a molar ratio of 1.5:1 to 6:1, in the presence of an acid catalyst at ... | 08/07/2007 |
| 7189875 | Diphenylamine alkylated with olefin mixtures containing fractions with varying degrees of activity Disclosed herein is a process for the preparation of alkylated diarylamines comprising adding to said diarylamine an olefin mixture containing highly reactive fractions, as well as fractions exhibiting a relatively lower chemical reactivity, in the presence of an ac... | 03/13/2007 |
| 7145038 | Alkylation of a diphenylamine compound in ionic liquid A process for alkylation of a diphenylamine compound in an ionic liquid. The use of an ionic liquid permits convenient separation of the alkylated reaction product from the reaction mixture. ... | 12/05/2006 |
| 7081504 | Synthesis of 1,4-polybutadiene This invention is based upon the unexpected discovery that alkylated diphenylamines can be used in conjunction with nickel based catalyst systems which contain (a) an organonickel compound, (b) an organoaluminum compound, and (c) a fluorine containing compound to pr... | 07/25/2006 |
| 7005553 | Method for the nitration of phenolic compounds A method for the regioselective ortho-directed nitration of phenolic compounds useful for the preparation of ortho-nitro-phenols according to formula (I) is described. ... | 02/28/2006 |
| 7002053 | Method for preparing high-purity diisobutene The invention relates to a process for preparing high-purity diisobutene by reaction of isobutene or isobutene-containing hydrocarbon mixtures over a solid acidic ion-exchange resin containing sulfonic acid groups whose protons have been partly replaced by metal ion... | 02/21/2006 |
| 6930183 | Alkylated iminodibenzyls as antioxidants Disclosed herein is an antioxidant that is an alkylated iminodibenzyl of the general formula: wherein: R1, R2, R3, and R4 are independently... | 08/16/2005 |
| 6689912 | Methods for preparing O-desmethylvenlafaxine The present invention provides an efficient method of making O-desmethyl-venlafaxine.... | 02/10/2004 |
| 6639102 | Process for producing polyisocyanates of the diphenyl methane series having a reduced color value Polyisocyanates of the diphenyl methane series having reduced color values are obtained by a) reacting aniline and formaldehyde in the presence of an acid catalyst to form a polyamine, b) neutralizing the reaction mixture containing polyamine with a base,... | 10/28/2003 |
| 6624201 | HIGH PURITY (1R,2S,4R)-(-)-2-[(2'-{N,N-DIMETHYLAMINO}-ETHOXY)]-2-[PHENYL]-1,7,7 -TRI-[METHYL]-BICYCLO [2.2.1]HEPTANE AND PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS THEREOF AND A PROCESS FOR THE PREPARATION OF THESE COMPOUNDS AS WELL AS MEDICAMENTS CONTAINING 1 OR MORE OF THESE COMPOUNDS AND THEIR USE The invention relates to high purity (1R,2S,4R)-(-)-2-[(2'-{N,N-dimethylamino}-ethoxy)]-2-[phenyl]-1,7,7-tri-[m ethyl]-bicyclo[2.2.1]heptane and pharmaceutically acceptable acid addition salts thereof containing not more than 0.2% of (1R,3S,4R)-3-[(2'... | 09/23/2003 |
| 6600074 | Perfluoroalkylated aniline compound and process for producing the same The present invention provides an aniline derivative represented by the formula (I) ##STR1## wherein R1 and R2 are each H, (C1-12)alkyl, (C3-8)cycloalkyl, hydroxy(C1-12)alkyl, hydroxycarbonyl (C | 07/29/2003 |
| 6566571 | Method of producing biaryls Process for preparing monofunctional, bifunctional and/or polyfunctional biaryls of the formula (I) Ar--Ar' (I) by reacting haloaromatics of the formula (II) Ar--X (II) with boron compounds of the formula (IIIa), (IIIb) and/or (IIIc) ##STR1## in the presence... | 05/20/2003 |
| 6392111 | Method for producing olefins Olefins containing aromatic substituents are synthesized without the addition of phosphonium salts or phosphanes with the aid of a PdII compound as a catalyst in the presence of nitrogen-containing additives such as N,N-dimethylglycine and a ba... | 05/21/2002 |
| 6355839 | Alkylation of diphenylamine with polyisobutylene oligomers A process for preparation of alkylated diphenylamine antioxidant which comprises alkylating diphenylamine with a polyisobutylene in the presence of a clay catalyst, wherein the polyisobutylene has an average molecular weight in the range of 120 to 600 and... | 03/12/2002 |
| 6315925 | Nonylated diphenylamines The invention relates to a mixture of nonylated diphenylamines, especially dinonylated diphenylamines, and to a technically advantageous methodological process for the preparation of that mixture by using acid catalysts in small quantities. The mixture is... | 11/13/2001 |
| 6215035 | Process for the preparation of aralkylated aromatic compounds using heterogeneous catalyst The invention relates to a process for the preparation of aralkylated aromatic compound with both small and large size aralkylating agents; wherein the catalyst used is heterogeneous solid catalyst removable from the reaction products by simple filtration... | 04/10/2001 |
| 6204412 | Method of manufacturing alkylated diphenylamine compositions and products thereof A method of manufacturing an alkylated diphenylamine composition to generate an alkylated diphenylamine composition with relatively low amounts of unsubstituted diphenylamine, based on the total weight of substituted and unsubstituted diphenylamine in the... | 03/20/2001 |
| 6028225 | Method of making hydroxy-substituted hydroxylamines and color developers containing same Hydroxy-substituted hydroxylamine antioxidants can be prepared by reacting hydroxylamine or a mono-substituted hydroxylamine, in free base form, with an epoxide. The antioxidant reaction product can be used without isolation from the reaction solution, an... | 02/22/2000 |
| 5962739 | Process for the preparation of N,N- dialkylaminophenyl alkanols The present invention provides a process for the production of an N,N-dialkylaminophenyl alkanol having the formula: ##STR1## in which R1 and R2, independently, are C1 -C4 alkyl, R3 is hydrogen, ... | 10/05/1999 |
| 5902902 | Process for the industrial preparation of aminoacetylenes A process for the preparation of 3-aminophenylacetylene derivatives of formula: ##STR1## wherein R1 is as defined in the disclosure ##STR2## wherein Y is as defined in the disclosure R--C.tbd.C--H wherein R is as defined in the disclo... | 05/11/1999 |
| 5840979 | Aliphatic propargylamines as cellular rescue agents The present invention relates to the use of a group of propargylamines of the general formula (I) ##STR1## wherein R1 is hydrogen or CH3 and R2 is (CH2)n CH3 and n is an integer from 0... | 11/24/1998 |
| 5817831 | Alkylation of aromatic amines using a heterpoly catalyst Aliphatic hydrocarbyl-substituted aromatic amines are prepared by reacting an aromatic amine and an aliphatic hydrocarbylating agent, such as an olefin, in the presence of a heteropolyacid catalyst such as Cs2.5 H0.5 PW12 ... | 10/06/1998 |
| 5750787 | Liquid alkylated diphenylamine antioxidant A process for monoalkylating diphenylamine using a clay catalyst is disclosed which results in a reaction product having substantial amounts of desirable monoalkylated diphenylamine and minimal amounts of less desirable disubstituted diphenylamine and uns... | 05/12/1998 |
| 5734084 | Synthesis of alkylated aromatic amines An improved method for making alkylated aromatic amines is disclosed. The method includes a new alkylating catalyst system comprising an aromatic amine alkylating catalyst and a non-catalyst solid such as silica. The method results in faster reaction rate... | 03/31/1998 |
| 5672752 | Liquid alkylated diphenylamine antioxidant A process for monoalkylating diphenylamine using clay catalyst is disclosed which results in a reaction product having substantial amounts of desirable monoalkylated diphenylamine and minimal amounts of less desirable disubstituted diphenylamine and unsub... | 09/30/1997 |
| 5659084 | Processes and intermediates for the preparation of 2-substituted benzaldehydes Processes for preparing 2-substituted benzaldehydes of general formula (I), wherein: R1 is CH2 CH2 --(L1)p --(CH2)q --(L2)r --CH2 --(T)2 --... | 08/19/1997 |
| 5633407 | Process for preparing substituted aromatic amines A process for preparing substituted aromatic azo compounds is provided which comprises contacting a nucleophilic compound and an azo containing compound in the presence of a suitable solvent system, and reacting the nucleophilic compound and the azo conta... | 05/27/1997 |
| 5618979 | Process for preparing substituted aromatic amines A process for preparing substituted aromatic amines which comprises contacting a nucleophilic compound and a substituted aromatic azo compound in the presence of a suitable solvent system, and reacting the nucleophilic compound and the substituted aromati... | 04/08/1997 |
| 5599995 | Electrophotographic photoconductor comprising pyrenylamine derivative, the pyrenylamine derivative, intermediate for preparation thereof, and method for preparing the pyrenylamine derivative and the intermediate An electrophotographic photoconductor comprises an electroconductive substrate and a photoconductive layer formed thereon comprising as an effective component at least one pyrenylamine derivative of formula (I): ##STR1## wherein R1, R... | 02/04/1997 |
| 5571453 | Stabilized polyether polyol and polyurethane foam obtained therefrom A stabilizer composition useful as an additive for polyether polyols, particularly those employed in the manufacture of polyurethane foams, is provided which comprises a diphenylamine:isobutylene:diisobutylene reaction product, a sterically hindered pheno... | 11/05/1996 |
| 5520848 | Mixtures and compositions containing phenothiazines A mixture containing phenothiazines which is obtainable by reacting a mixture of diphenylamines comprising ______________________________________ 1 to 5% by weight a) diphenylamine of 8 to 18% by b) 4-tert-butyldi... | 05/28/1996 |
| 5466871 | Process for preparing nitroaniline derivatives A process for preparing a nitroaniline derivative comprising a step of reacting an aromatic nitro compound with an O-alkylhydroxylamine or a salt thereof in the presence of a base and optionally a metallic catalyst, which process is industrially advantage... | 11/14/1995 |
