Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7361789 | Dihydronaphthalene compounds, compositions, uses thereof, and methods for synthesis The present invention relates to novel dihydronaphthalene compounds, compositions, methods for using the same, and processes for preparing the same. The present invention also relates to novel total synthesis approaches for preparing these compounds. In addition, th... | 04/22/2008 |
| 7235694 | Process for preparing 4-aminodiphenylamine A process for preparing 4-aminodiphenylamine having the steps of reacting nitrobenzene and aniline in the presence of a complex base catalyst, hydrogenating the reaction mixture with hydrogen, a powdery composite catalyst, and a hydrogenation solvent; separating, re... | 06/26/2007 |
| 7230134 | Method for the production of amines by reductive amination of carbonyl compounds under transfer-hydrogenation conditions This application claims the benefit of German priority Application No. 10138140.9, filed on Aug. 9, 2001, and International Application No. PCT/EP02/08748, filed on Aug. 6, 2002. The invention relates to the production of amines by the reaction of aldehydes or keton... | 06/12/2007 |
| 7196033 | Advances in amination catalysis Provided herein are catalysts useful in reductive amination, which include nickel, copper, zirconium and/or chromium, oxygen, and tin. The presence of the tin increases the selectivity of the catalyst in reductive aminations over the catalysts of the prior art. ... | 03/27/2007 |
| 7183438 | Catalysts and method for the production of amines Disclosed are catalysts, the catalytically active mass of which contains 22 to 40 percent by weight of oxygen-containing compounds of zirconium, calculated as ZrO2, 1 to 30 percent by weight of oxygen-containing compounds of copper, calculated as CuO, 15 ... | 02/27/2007 |
| 7183439 | Process for preparing 4-aminodiphenylamine intermediates The invention is directed to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps: a. bringing an aniline or aniline derivative and nitrobenzene into reactive contact; and b. re... | 02/27/2007 |
| 7176333 | Process for preparing 4-aminodiphenylamine The present invention discloses a process for preparing 4-aminodiphenylamine, which process uses nitrobenzene and aniline as raw materials, a complex base catalyst as condensation catalyst and a powdery composite catalyst as hydrogenation catalyst, and comprises fiv... | 02/13/2007 |
| 7176332 | Methods for the synthesis of amines such as ephedrine and intermediates A method for the preparation of a compound of formula (VI): in which R2 is an optionally substituted C1–C6 alkyl; R4 is H, OH, an optionally substituted C1–C6 alkyl or an optionally substituted C1–C6 alkoxy; R5 is an optionally... | 02/13/2007 |
| 7084302 | Process for preparing 4-aminodiphenylamine A process for preparing 4-aminodiphenylamine using nitrobenzene and aniline as raw materials, a complex base catalyst as the condensation catalyst, and a powdery composite catalyst as the hydrogenation catalyst. The process has 5 process stages including condensatio... | 08/01/2006 |
| 7074963 | Preparation of secondary amines Disclosed herein is a process for the reductive alkylation of primary amines to form secondary amines, by high pressure reaction of the primary amine with an alkylating agent and hydrogen in the presence of a catalyst which comprises metallic palladium. A process of... | 07/11/2006 |
| 7034186 | Preparation of an amine Process for preparing an amine by reacting a primary or secondary alcohol, aldehyde or ketone with hydrogen and a nitrogen compound selected from the group consisting of ammonia and primary and secondary amines in the presence of a catalyst whose preparation has inv... | 04/25/2006 |
| 7030053 | Catalyst composition comprising ruthenium and a treated silica support component and processes therefor and therewith for preparing high molecular weight hydrocarbons such as polymethylene A catalyst composition and a process of using a catalyst composition for preparing high molecular weight hydrocarbons, such as polymethylene, from a fluid containing hydrogen and carbon monoxide are disclosed. The catalyst composition contains ruthenium and a treate... | 04/18/2006 |
| 6822118 | Process for the hydrogenation of imines A process for the hydrogenation of imines with hydrogen under elevated pressure in the presence of iridium catalysts and with or without an inert solvent, wherein the reaction mixture contains an ammonium or metal chloride, bromide or iodide and additionally an acid... | 11/23/2004 |
| 6696608 | Transfer hydrogenation process A catalytic transfer hydrogenation process is provided. The process can be employed to transfer hydrogenate N-substituted imines and iminium salts, which are preferably prochiral. The catalyst employed in the process is preferably a metal complex with one... | 02/24/2004 |
| 6696609 | Process for producing diamines A process for producing diamines which comprises the steps of: (1) reacting a dialdehyde with ammonia and hydrogen in the presence of an alcohol and a hydrogenation catalyst to synthesize the corresponding diamine; (2) separating and recovering the alcoho... | 02/24/2004 |
| 6689914 | Preparation of amines The preparation of amines of the formula (I): R1 R2 CH--N R3 R4 (I) in which R1, R2, R3 and R4, independently of one another, are hydrogen, straight-chain or branched C1 | 02/10/2004 |
| 6642420 | Method for producing aldehydes and/or alcohols or amines A process for the preparation of aldehydes and/or alcohols or amines by reacting olefins in the liquid phase with carbon monoxide and hydrogen, a part of these gases being dispersed in the form of gas bubbles in the reaction liquid and another part being ... | 11/04/2003 |
| 6583320 | Process for preparing 4-aminodiphenylamine intermediates The invention is directed-to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact and reacting the aniline and nitrobenzene in a confi... | 06/24/2003 |
| 6508753 | Chiral ligands for asymmetric catalysis A novel phosphine ligand is an enantiomerically enriched compound of formula 5 ##STR1## or the opposite enantiomer thereof, wherein Ar1 and Ar2 represent the same or different aromatic groups of up to 20 C atoms. A transition me... | 01/21/2003 |
| 6479704 | Hydrogenation with monolith reactor under conditions of immiscible liquid phases 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 ... | 11/12/2002 |
| 6462236 | Preparation of amines Amines of the formula (I) R1 R2 CH--NR3 R4 (I) where R1, R2, R3 and R4 are each, independently of one another, hydrogen, straight-chain or branched C1 -C12 | 10/08/2002 |
| 6429335 | Reductive amination of aldehydes The present invention relates to a process for preparing amines of formula (I) R1 --CH2 --NH2 (I), wherein R1 represents optionally branched C1 -C12 -alkyl, C3 -C8 -cycloa... | 08/06/2002 |
| 6395933 | Process for preparing 4-aminodiphenylamine intermediates The invention is directed to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact; and reacting the aniline and nitrobenzene in a conf... | 05/28/2002 |
| 6331649 | Process for producing trifluoromethylbenzylamines The present invention relates to a process for producing a trifluoromethylbenzylamine represented by the general formula (1). This process includes the step of reducing an oxime represented by the general formula (2), ##STR1## where R1 rep... | 12/18/2001 |
| 6323370 | Catalytic process The present invention relates to methods for the reductive amination of a carbonyl-containing compound. R1 R2 CO where R1 and R2 are either H, alkyl, aryl or heterocyclic etc with an amine NHR3 R... | 11/27/2001 |
| 6130332 | Method of alkylating triazine derivatives The object of the present invention is to provide a method for producing substituted-1,3,5-triazine derivatives at high yield, in which at least one of carbon atoms in the ring thereof is substituted by a secondary amine group having at leat one of alkyl ... | 10/10/2000 |
| 6100430 | Alicyclic polyamines and process for the preparation thereof An alicyclic polyamine of the formula (1) ##STR1## wherein Y1 represents a saturated aliphatic hydrocarbon group and R1 through R4 are the same or different and each represents hydrogen atom, an alkyl group, a cycloal... | 08/08/2000 |
| 6046359 | Catalysts for the amination of alkylene oxides, alcohols, aldehydes and ketones A catalyst comprises, based on the total weight of the catalyst, 0.1-6% by weight of cobalt, nickel or a mixture thereof, 0.001-25% by weight of ruthenium, 0-10% by weight of copper and 0-5% by weight of promoters on a porous metal oxide carrier. It preferably comprises... | 04/04/2000 |
| 5977411 | Catalytic hydrogeneration of nitrobenzene to 4-aminodiphenylamine in the presence of a hydroxyl compound and a solvent This invention provides a method for preparing 4-ADPA by charging nitrobenzene into a reaction zone under hydrogen pressure in the presence of a strong organic base and a catalyst for hydrogenation. The method provides the convenience and economy of a one... | 11/02/1999 |
| 5861535 | Reductive alkylation process to prepare tertiary aminoaryl compounds Tertiary aminoaryl compounds, such as N,N'dialkylaminoaryl compounds, are prepared using successive reductive steps without isolation therebetween, at high temperature and pressure. A nitroaryl compound is reduced using a ketone as both solvent and reacta... | 01/19/1999 |
| 5817876 | Preparation of N-alkyl-arylamines Preparation of an N-alkyl-arylamine of the formula ##STR1## in which Ar represents an aryl radical which is optionally monosubstituted or polysubstituted by at least one of halogen and in each case optionally substituted alkyl, alkoxy or alkoxycarbon... | 10/06/1998 |
| 5719298 | Methods of producing pantothenic acid derivative and its starting materials for producing the same A method of producing a pantothenic acid derivative of formula (I): ##STR1## wherein each of R1 and R2 is different, and is a branched aliphatic hydrocarbon group having 3 to 5 carbon atoms, or a phenyl group; or a straight chai... | 02/17/1998 |
| 5686616 | Process for preparing an optically active amine A novel process for preparing an optically active amine by asymmetric hydrogenation of an imine compound, such as an imine compound prepared by condensing benzylamine and acetophenone, in the presence of a catalytic amount of an iridium-optically active p... | 11/11/1997 |
| 5654483 | Process for producing alkoxy-substituted triphenylamines A process for producing an alkoxy-substituted tri-phenylamine comprising reacting an alkoxy-substituted cyclohexanone with a diphenylamine or an aniline, while forming said cyclohexanone in the same system from an alkoxy-substituted phenol by using said p... | 08/05/1997 |
| 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 |
| 5625097 | Process for preparing diphenylamines and catalysts usable for this purpose The preparation of optionally substituted diphenylamine by reaction of optionally substituted aniline with optionally substituted cyclohexanone using a supported Rh catalyst containing rhodium or a combination of rhodium with another platinum metal from t... | 04/29/1997 |
| 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 |
| 5616804 | Process for the preparation of dibenzylamine The present process involves preparing dibenzylamine through the hydrogenation of benzaldehyde in the presence of ammonia and a catalyst containing palladium using a small amount of solvent or dispersion medium. With the present process, dibenzylamine can... | 04/01/1997 |
| 5616799 | Process for the preparation of glycoloylanilides A process for the preparation of glycoloylanilide of the formula (G) ##STR1## is recited that involves reacting a nitrobenzene with hydrogen and, if desired, with a carbonyl compound, in the presence of a noble metal catalyst and a solvent, reacting ... | 04/01/1997 |
| 5608111 | Method of preparing 4-aminodiphenylamine A method of producing 4-ADPA is disclosed wherein aniline or substituted aniline derivatives and nitrobenzene are reacted under suitable conditions to produce 4-nitrodiphenylamine or substituted derivatives thereof and/or 4-nitrosodiphenylamine or substit... | 03/04/1997 |
