Patents Represented by Attorney James J. Mullen
  • Patent number: 5763608
    Abstract: 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 of time and under suitable temperature and pressure conditions to form an oxazone (b) adding a carboxylic acid and a primary amine salt of a carboxylic acid to said oxazone to form a mixture, (c) distilling azeotropically said mixture for a suitable period of time and under suitable temperature and pressure conditions to substantially remove said dehydration agent and said organic solvent, and (d) heating the product of step (c) for a sufficient period of time and under suitable temperature and pressure conditions to form said pyrimidin derivatives.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: June 9, 1998
    Assignee: Hoechst Celanese Corporation
    Inventors: Apurba Bhattacharya, Diane E. Allen
  • Patent number: 5739330
    Abstract: The present invention provides a process for preparing a quinazolone 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 of time and under suitable temperature and pressure conditions to form an oxazone (b) adding a carboxylic acid and a primary amine salt of a carboxylic acid to said oxazone to form a mixture, (c) distilling azeotropically said mixture for a suitable period of time and under suitable temperature and pressure conditions to substantially remove said dehydration agent and said organic solvent, and (d) heating the product of step (c) for a sufficient period of time and under suitable temperature and pressure conditions to form said quinazolone.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: April 14, 1998
    Assignee: Hoechst Celanese Corporation
    Inventors: Apurba Bhattacharya, Diane E. Allen
  • Patent number: 5710282
    Abstract: The present invention provides a novel one-step process for preparing substituted aryls which can be used as end-capping monomers for preparing highly branched macromolecule polymers that have highly controlled molecular architectures. The process comprises the steps of (a) reacting an aromatic acid with an activating carbodiimide for a sufficient period of time and under suitable conditions of temperature and pressure to form an activated aromatic intermediate, and (b) reacting said intermediate with a suitable nucleophile for a sufficient period of time and under suitable conditions of temperature and pressure to form said substituted aryl compound.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: January 20, 1998
    Assignee: Hoechst Celanese Corporation
    Inventors: Kathleen Nelson Juneau, Richard Vicari, Carl David Murphy
  • Patent number: 5618958
    Abstract: A novel catalyst comprising the formula:LRE(O)nwhereinL is selected from the group consisting of(a) (R.sub.1)(AL)wherein R.sub.1 is an alkyl side chain containing at least one carbon-rhenium covalent bond, andAL is a molecule having C.sub.2 to C.sub.50, and has at least one hetero atom selected from the group consisting of N, O, S, and P wherein there is at least one hetero-rhenium dative bond, and has at least one chiral center. and(b) R.sub.AL is a straight or branched chain alkyl or arylalkyl group containing C.sub.2 to C.sub.50 and containing at least one heteroatom selected from the group consisting of N, O, S, and P, with the proviso that said alkyl group contains at least one carbon-rhenium covalent bond and at least one hetero-rhenium dative bond, and has at least one chiral center:and n is an integer which is 2, 3, 4, or 5 and which has utility in areas such as epoxidation of olefins.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: April 8, 1997
    Assignee: Hoechst Celanese Corporation
    Inventors: Charles E. Tucker, Kenneth G. Davenport
  • Patent number: 5602267
    Abstract: Asymmetric synthesis using a novel catalyst comprising the formula: ##STR1## and which has utility in areas such as epoxidation of olefins.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: February 11, 1997
    Assignee: Hoechst Celanese
    Inventor: Shu-Hai Zhao
  • Patent number: 5591809
    Abstract: 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 compound having the formula: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are defined herein, with a core monomer and an end-capping monomer, such as a phenolic ester, for a sufficient period of time and at a sufficient temperature to directly produce the highly branched polymer, in a single processing step.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: January 7, 1997
    Assignee: Hoechst Celanese Corporation
    Inventors: Richard Vicari, Kathleen N. Juneau, Carl D. Murphy
  • Patent number: 5578687
    Abstract: 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 substantially the same range as said hydroxystyrene; and (b) polymerizing said hydroxystyrene under suitable polymerization conditions of pressure and temperature and for a sufficient period of time to form poly(hydroxystyrene).
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: November 26, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: James R. Sounik, Keith M. Russ
  • Patent number: 5574196
    Abstract: 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 pressure to form said alkanols.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: November 12, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Charles E. Tucker, Diane E. Allen, Charles C. Hobbs
  • Patent number: 5567299
    Abstract: 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.degree. C. to about 120.degree. C. in the presence of an electrolyte for a sufficient period of time to form an arylacetal, and (b) subjecting said acetal to hydrolysis for a sufficient period of time and under suitable temperature and pressure conditions to form said arylglyoxal.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: October 22, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Ricardo E. Borjas, Carina Araullo-McAdams, Steven R. Alexander, George A. Blay, Yaw-Hwa Liu
  • Patent number: 5567795
    Abstract: 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 compound having the formula: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are defined herein, with a second monomer (an end-capping monomer) such as a phenolic ester for a sufficient period of time and at a sufficient temperature to directly produce the highly branched polymer, in a single processing step.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: October 22, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Richard Vicari, Kathleen N. Juneau, Carl D. Murphy
  • Patent number: 5565544
    Abstract: 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) R.sub.1 is selected from the group consisting of H, alkyl C.sub.1 -C.sub.20, substituted and unsubstituted phenyl, and C(O)R.sub.8 (where R.sub.8 is alkyl C.sub.1 -C.sub.20); (b) R.sub.2 is selected from the group consisting of H and alkyl C.sub.1 -C.sub.20 ; and (c) R.sub.3 -R.sub.7 are each independently selected from the group consisting of H, alkyl C.sub.1 -C.sub.20, OR.sub.9 (where R.sub.9 is H, alkyl C.sub.1 -C.sub.20, esters thereof, or substituted and unsubstituted phenyl), halogen, BZT, nitro, or amino, with the proviso that at least one of R.sub.3 -R.sub.7 is OR.sub.9, in the presence of a suitable catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form said novolak type polymer.
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: October 15, 1996
    Assignee: Hoechst Celanese Corporation
    Inventor: James R. Sounik
  • Patent number: 5563300
    Abstract: 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 and pressure in the presence of a suitable catalyst and a basic material, and for a sufficient period of time to form HPMC.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: October 8, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: James R. Sounik, Graham N. Mott, Charles B. Hilton, Mohammad Aslam
  • Patent number: 5563263
    Abstract: The present invention provides novel D.sub.4 -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 ketones. For example, the chloromanganese (III) derivatives of the new macrocycles have utility as catalysts for the asymmetric epoxidation of aromatic alkenes.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: October 8, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Thomas J. Kodadek, John F. Barry
  • Patent number: 5563289
    Abstract: 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 dehydration conditions of temperature and pressure to form said acetoxystyrene.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: October 8, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: James R. Sounik, Keith M. Russ
  • Patent number: 5554719
    Abstract: 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.sub.1 is selected from the group consisting of H, alkyl C.sub.1 -C.sub.20, substituted and unsubstituted phenyl, and C(O)R.sub.8 (where R.sub.8 is alkyl C.sub.1 -C.sub.20); (b) R.sub.2 is selected from the group consisting of H and alkyl C.sub.1 -C.sub.20 ; and (c) R.sub.3 -R.sub.7 are each independently selected from the group consisting of H, alkyl C.sub.1 -C.sub.20, OR.sub.9 (where R.sub.9 is H, alkyl C.sub.1 -C.sub.20, esters thereof, or substituted and unsubstituted phenyl), halogen, BZT, nitro, or amino, with the proviso that at least one of R.sub.3 -R.sub.7 is OR.sub.9, in the presence of a suitable catalyst for a sufficient period of time and under suitable conditions of temperature and pressure to form said polyhydroxystyrene.
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: September 10, 1996
    Assignee: Hoechst Celanese Corporation
    Inventor: James R. Sounik
  • Patent number: 5536874
    Abstract: 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 suitable pressure and temperature to form said acid derivative, with the proviso that said carbonylation conditions include conducting the reaction in a two-phase system wherein one phase is an aqueous medium which contains (1) a catalyst which is a water-soluble metal complex consisting essentially of a Group VIII metal and a hydrophilic ligand such as palladium complexed with trisulfonated triphenylphosphine, and (2) optionally an acid, and wherein the second phase comprises said arylcarbinol.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: July 16, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Roger A. Sheldon, Leendert Maat, Georgios Papadogianakis
  • Patent number: 5523378
    Abstract: 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 palladium catalyst and a basic material and for a sufficient period of time to form 4-hydroxyphenylmethylcarbinol; (b) heating 4-hydroxyphenylmethylcarbinol under suitable conditions of temperature and pressure and for a sufficient period of time to form said polyhydroxystyrene.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: June 4, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: James R. Sounik, Graham N. Mott, Charles B. Hilton
  • Patent number: 5508451
    Abstract: 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 conditions, first in the presence of an alkali metal alkoxide and a suitable organic solvent, then followed by the addition of substantially dry mineral acid and a suitable organic solvent; and (3) hydrolyzing the ring-closed material in the presence of a base material and a suitable organic solvent to form said cromoglycate.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: April 16, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Apurba Bhattacharya, Boyd A. Keys
  • Patent number: 5508458
    Abstract: A novel catalyst comprising the formula: ##STR1## and which has utility in areas such as epoxidation of olefins.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: April 16, 1996
    Assignee: Hoechst Celanese Corporation
    Inventor: Shu-Hai Zhao
  • Patent number: 5500099
    Abstract: 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.degree. C. to about 120.degree. C. in the presence of an electrolyte for a sufficient period of time to form an arylacetal, and (b) subjecting said acetal to hydrolysis for a sufficient period of time and under suitable temperature and pressure conditions to form said arylglyoxal.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: March 19, 1996
    Assignee: Hoechst Celanese Corporation
    Inventors: Ricardo E. Borjas, Carina Araullo-McAdams, Steven R. Alexander, George A. Blay, Yaw-Hwa Liu