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| Number | Title | Issue Date |
| 5763608 | Process for preparing pyrimidine derivatives The present invention provides a process for preparing a 5,6-dihydro-3H-pyrimidin-4-one derivatives which comprises the steps of (a) dehydrating a N-acyl beta amino acid in the presence of a dehydration agent and an organic solvent for a sufficient period... | 06/09/1998 |
| 5591809 | Process for preparing hyperbranched polymers The present invention provides novel one-step processes for preparing highly branched macromolecule polymers that have highly controlled molecular architectures. The process comprises the reaction of a branching monomer such as a substituted phenyl compou... | 01/07/1997 |
| 5578687 | Process for preparing poly(4-hydroxystyrene) A process for preparing a poly(hydroxystyrene) which comprises the steps of (a) heating a carbinol under decomposition conditions in the presence of a solvent for a sufficient period of time to form hydroxystyrene, said solvent having a boiling point in s... | 11/26/1996 |
| 5574196 | Process for preparing alkanols A process for preparing tertiary alkanols which comprises the step of oxidizing with ozone a saturated hydrocarbon having a tertiary carbon center in the presence of a carboxylic acid and for a sufficient period of time and at suitable temperature and pre... | 11/12/1996 |
| 5567795 | Process for preparing hyperbranched polymers The present invention provides novel one-step processes for preparing highly branched macromolecule polymers that have highly controlled molecular architectures. The process comprise the reaction of a branching monomer such as a substituted phenyl compoun... | 10/22/1996 |
| 5567299 | Process for the electrochemical oxidation of arylketones The present invention provides a process for preparing arylglyoxals which comprise the steps of (a) electrochemically oxidizing an arylketone at a pH of less than about seven and at a temperature of from about -20° C. to about 120° C. in the presence of... | 10/22/1996 |
| 5565544 | Process for preparing polyhydroxystyrene with a novolak type structure A process for preparing a polyhydroxystyrene having a novolak type structure which comprises the step of polymerizing a mixture of carboxylic acid and at least one substituted phenyl carbinol whose formula is: ##STR1## wherein (a) R1 is se... | 10/15/1996 |
| 5563300 | Process for preparing 4-hydroxyphenylmethylcarbinol The present invention provides a unique and novel way of producing carbinols such as 4-hydroxyphenylmethylcarbinol (HPMC). In this new process, a ketone such as 4-hydroxyacetophenone (4-HAP) is heated under suitable hydrogenation conditions of temperature... | 10/08/1996 |
| 5563289 | Process for preparing acetoxystyrene The present invention provides a unique and novel way of producing an acetoxystyrene. In this new process which comprises a single step, a mixture of (a) a carbinol, (b) an acetylating agent, and (c) an acid catalyst is dehydrated under suitable dehydrati... | 10/08/1996 |
| 5563263 | D4 -symmetric porphyrin-based catalysts, processes for preparing same, and processes for using same The present invention provides novel D4 -symmetric chiral porphyrins derived from 1R-(+)-nopinone. The simplicity and flexibility of this synthetic protocol provides an attractive route to this novel class of porphyrins starting from cyclic ket... | 10/08/1996 |
| 5554719 | Polyhydroxystyrene with a novolak type structure A new polyhydroxystyrene having a novolak type structure which is prepared by the process which comprises the step of polymerizing a mixture of carboxylic acid and at least one substituted phenyl carbinol whose formula is: ##STR1## wherein (a) R... | 09/10/1996 |
| 5536874 | Process for preparing arylacetic acid and arylpropionic acid derivatives There is provided a process for preparing an arylacetic acid or arylpropionic acid divative from an arylcarbinol which comprises the step of subjecting said arylcarbinol to suitable carbonylation conditions for a sufficient period of time and under suitab... | 07/16/1996 |
| 5523378 | Process for preparing vinylphenol polymers & copolymers The present invention provides a unique and novel way of producing polyhydroxystyrene which comprises the steps of (a) heating 4-hydroxyacetophenone under suitable hydrogenation conditions of temperature and pressure in the presence of a suitable palladiu... | 06/04/1996 |
| 5508458 | Chiral catalysts and processes for preparing the same A novel catalyst comprising the formula: ##STR1## and which has utility in areas such as epoxidation of olefins.... | 04/16/1996 |
| 5508451 | Process for the preparation of dialkali metal cromoglycates A process for preparing a dialkali metal cromoglycate which comprises (1) condensing a hydroxy substituted ketone with a condensing agent in the presence of a base material and an organic solvent; (2) subjecting the condensed material to ring-closure cond... | 04/16/1996 |
| 5500099 | Process for the electrochemical oxidation of arylketones The present invention provides a process for preparing arylglyoxals which comprise the steps of (a) electrochemically oxidizing an arylketone at a pH of less than about seven and at a temperature of from about -20° C. to about 120° C. in the presence of... | 03/19/1996 |
| 5498804 | Process for preparing 4-hydroxyphenylmethylcarbinol The present invention provides a unique and novel way of producing carbinols such as 4-hydroxyphenylmethylcarbinol (HPMC). In this new process, a ketone such as 4-hydroxyacetophenone (4-HAP) is heated under suitable hydrogenation conditions of temperature... | 03/12/1996 |
| 5498802 | Process for preparing omega-halo-ketones A process for preparing 6-chloro-2-hexanone which comprises the steps of (a) dehydrating cyclohexanol in the presence of a suitable catalyst and at a suitable temperature and for a sufficient period of time to form cyclohexene; (b) rearranging said cycloh... | 03/12/1996 |
| 5493062 | Process for preparing 4-hydroxystyrene The present invention provides a unique and novel way of producing vinyl phenols such as p-vinyl phenol (4-hydroxystyrene--HSM). In this new process, p--aminoethylphenol (AEP) is heated under suitable deamination conditions of temperature and press... | 02/20/1996 |
| 5491265 | Process for preparing 6-chloro-2-hexanone from 1-methylcyclopentane A process for preparing 6-chloro-2-hexanone which comprises the steps of (a) oxidizing methylcyclopentane with ozone in the presence of a carboxylic acid and for a sufficient period of time to form 1-methylcyclopentanol; (b) reacting said 1-methylcyclopen... | 02/13/1996 |
| 5489712 | Process for preparing cyclic ketones The present invention provides a novel process for preparing cyclic ketones, such as indanones, which comprises the steps of (a) subjecting a substituted ketone to suitable methylenation conditions in the presence of a methylene transfer agent and an acyl... | 02/06/1996 |
| 5466873 | Process for preparing arylketoamines Arylketoamines are prepared by reacting arylisonitrosoalkanones with hydrogen in the presence of a transition metal catalyst and a liquid carboxylic acid at a temperature of less than about 600° C.... | 11/14/1995 |
| 5466869 | Process for perparing 4-hydroxyacetophenone oxime A catalytic process for preparing 4-hydroxyacetophenone oxime by reacting 4-hydroxyacetophenone with NH3 and H2 O2 in the liquid phase, in the presence of a catalyst substantially consisting of a titanium-containing molecu... | 11/14/1995 |
| 5464941 | Biphenyl pyrazine compounds The present invention provides novel substituted biphenyl pyrazines or pyrazine derivatives ("BPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, pol... | 11/07/1995 |
| 5464923 | Polymer compositions containing substituted biphenyl pyrazines The present invention provides novel substituted biphenyl pyrazines or pyrazine derivatives ("BPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, pol... | 11/07/1995 |
| 5463141 | Process for preparing poly(4-hydroxystyrene) The present invention provides a unique and novel way of producing vinyl phenols such as poly(4-hydroxystyrene) (PHS). In this new process, p--aminoethylphenol (AEP) is heated under suitable conditions of temperature and pressure and for a sufficie... | 10/31/1995 |
| 5463108 | Process for preparing acetoxystyrene The present invention provides a unique and novel way of producing 4-acetoxystyrene. In this new process, 4-hydroxystyrene is acetylated, in the presence of an acetylation agent, under suitable conditions of temperature and pressure and for a sufficient p... | 10/31/1995 |
| 5459266 | Substituted pyrazines The present invention provides novel substituted pyrazines or pyrazine derivatives ("NPD") which are functional and have useful application as a monomer for a variety of high performance polymers such as polyester, polyarylate, polycarbonate, polyetherket... | 10/17/1995 |
| 5457231 | Process for preparing arylketoamines Arylketoamines are prepared by reacting arylisonitrosoalkanones with hydrogen in the presence of a transition metal catalyst and a liquid carboxylic acid at a temperature of less than about 60° C.... | 10/10/1995 |
| 5453483 | Process for preparing poly(4-hydroxystyrene) The present invention provides a unique and novel way of producing vinyl phenols such as poly(4-hydroxystyrene) (PHS). In this new process, 4-hydroxyphenylmethylcarbinol (HPMC) is heated under suitable conditions of temperature and pressure and for a suff... | 09/26/1995 |
| 5453481 | Process for preparing vinylphenol polymers and copolymers The present invention provides a unique and novel way of producing polyhydroxystyrene which comprises the steps of (a) heating 4-hydroxyacetophenone under suitable hydrogenation conditions of temperature and pressure in the presence of a suitable palladiu... | 09/26/1995 |
| 5430189 | Process for preparing substituted and unsubstituted arylalkylamines An arylisonitrosoalkanone is hydrogenated in the presence of a noble metal catalyst and a weak carboxylic acid to form an arylalkanolamine which is then hydrogenated in the presence of a strong mineral acid and the transition metal catalyst to form an ary... | 07/04/1995 |
| 5430123 | Polymer compositions containing substituted pyrazines The present invention provides new polymer compositions which contain novel substituted pyrazines or pyrazine derivatives ("NPD") which are functional and have useful application as a monomer (co-monomer) for a variety of high performance polymers such as... | 07/04/1995 |
| 5424387 | Di-amino compounds and processes for preparing the same Di-amines endowed with chain extension activity for formulations such as polyureas and polyurethanes are disclosed, and which have the general formula: ##STR1## wherein n is 0-1000 and m is 0-100; R1, R2, R5, and R | 06/13/1995 |
| 5422417 | Substituted phenyl compounds and processes for preparing the same Substituted phenyl compounds endowed with chain extension activity for formulations such as polyurethanes are disclosed, and which have the general formula: ##STR1## wherein n is 1-1000 and m is 1-100; and R1 and R2 are each ... | 06/06/1995 |
| 5420366 | Process for the preparation of optically active 2-arylcyclohexanols The present invention provides a process for preparing optically active 2-arylcyclohexanol and its esters and ethers and which process comprises the step of subjecting 1-aryl-cyclohexane-1,2 diol and its diethers and diesters to hydrogenolysis conditions ... | 05/30/1995 |
| 5417245 | Metering valve and new use thereof A novel metering valve is used to split the streams in which a continuous fluid stream passes unregulated through the valve along a primary flow path. A second stream is formed by passing a small portion of the fluid in the primary flow path through a pas... | 05/23/1995 |
| 5399766 | Amines and processes for preparing the same Amines endowed with chain extension activity for formulations such as polyureas and polyurethanes are disclosed, which have the general formula: ##STR1## wherein n is 1-1000 and m is 1-100; R1 and R2 are from the group --C2... | 03/21/1995 |
| 5399760 | Color control & stability in acetaminophen A method is provided for purifying crude N-acetyl-para-aminophenol (APAP) containing color bodies or their precursors, the method comprising: a) forming a solution of the crude APAP; and b) subsequently contacting the solution with substoichiometric quant... | 03/21/1995 |
| 5399707 | Selective precipitation of -aryl carboxylic acid salts A process is provided whereby S(+)-ibuprofen or R(-)-ibuprofen L-lysinate salt is produced by selective precipitation from a mixture containing enantiomers of ibuprofen and L-lysine. The quantity of L-lysine is not more than about a molar equivalent of th... | 03/21/1995 |
