Patents by Inventor Paul Helquist

Paul Helquist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9333222
    Abstract: Embodiments herein relate to the field of lysosomal storage disorders, and, more specifically, to methods of treating lysosomal storage disorders such as Niemann-Pick type C disease, for instance with inhibitors of histone deacetylases, particularly inhibitors of class 1 histone deacetylases. In various embodiments, methods of treating Niemann-Pick type C disease with inhibitors of class 1 histone deacetylases are described.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: May 10, 2016
    Assignees: University of Notre Dame du Lac, Cornell University
    Inventors: Olaf Wiest, Frederick R. Maxfield, Paul Helquist
  • Publication number: 20110237832
    Abstract: Embodiments herein relate to histone deacetylaces (HDACs) and HDAC inhibitors, such as trichostatin A (TSA) and TSA analogues. Embodiments provide simple methods of synthesizing TSA and TSA analogues. These methods provide routes of synthesis of TSA and TSA analogues that enable the production of the HDAC inhibitors at lower cost and in greater quantities than previously were available.
    Type: Application
    Filed: February 16, 2011
    Publication date: September 29, 2011
    Applicant: University of Notre Dame du Lac
    Inventors: Paul Helquist, Douglas Schauer, Casey C. Cosner, Vijaya B.R. Iska, Anamitra Chatterjee, Olaf Wiest
  • Publication number: 20110071109
    Abstract: Embodiments herein relate to the field of lysosomal storage disorders, and, more specifically, to methods of treating lysosomal storage disorders such as Niemann-Pick type C disease, for instance with inhibitors of histone deacetylases, particularly inhibitors of class 1 histone deacetylases. In various embodiments, methods of treating Niemann-Pick type C disease with inhibitors of class 1 histone deacetylases are described.
    Type: Application
    Filed: September 22, 2010
    Publication date: March 24, 2011
    Applicants: University of Notre Dame du Lac, Cornell University
    Inventors: Olaf Wiest, Frederick R. Maxfield, Paul Helquist
  • Patent number: 7235688
    Abstract: A process for preparing unsaturated esters useful as intermediates for HDAC inhibitors, by reacting an aldehyde or ketone having the following formula I: wherein R1 is an aromatic group or a combined aliphatic and aromatic group; X is —O—, —S—, —COO—, —OOC—, —CONR7—, or —R7NCO—; L1 an aliphatic linking group, an aromatic linking group, or a combined aliphatic and aromatic linking group; R2 and R3 are each independently hydrogen, a hydroxy group, an alkoxy group, an amino group, a carboxyl group, an amide group, an ester group, a carbamate group, an aliphatic group, an aromatic group, a combined aliphatic and aromatic group, R2 and R3 together are ?O, or one of R2 and R3 form a double bond with one of R4 and R5; R4 and R5 are each independently hydrogen, a hydroxy group, an alkoxy group, an amino group, a carboxy group, an amide group, an ester group, a carbamate group, an aliphatic group, an aromatic group, a combined aliphatic and aromatic group, or one of R4 and R5 form a double bond with one of R2 and
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: June 26, 2007
    Assignee: University of Notre Dame Du Lac
    Inventors: Paul Helquist, Joakim Löfstedt
  • Publication number: 20070021612
    Abstract: Processes for preparing unsaturated esters useful as intermediates for HDAC inhibitors, by reacting an aldehyde or ketone with compounds having the following formula XX: wherein R8 is an aliphatic group, an aromatic group, or a combined aliphatic and aromatic group; R9 and R10 are each independently hydrogen, an aliphatic group, an aromatic group, a combined aliphatic and aromatic group, or R10 forms a double bond with L2 or X3; R11 and R12 are each independently an aliphatic group, an aromatic group, or a combined aliphatic and aromatic group; L2 is an aliphatic linking group, an aromatic linking group, or a combined aliphatic and aromatic linking group; A is P or As; L2 being selected so that the number of carbon atoms directly in the carbon chain between the R8 and R9 groups is at least 4, X1 and X2 are each independently O or a single bond, and X3 is O or forms R13 and double bond with R10, wherein R13 is an aliphatic group, an aromatic group, or a combined aliphatic and aromatic group.
    Type: Application
    Filed: September 29, 2006
    Publication date: January 25, 2007
    Applicant: University of Notre Dame du Lac
    Inventors: Paul Helquist, Joakim Lofstedt
  • Patent number: 6730788
    Abstract: Process for preparing 1,10-phenanthroline ligands represented by the formula which comprises coupling a 1,10-phenanthroline of the formula with a ketone e.g. a dialkyl, cycloalkyl or bicycloalkyl ketone with a metal coupling reagent, preferably a lanthanide II e.g. samarium II, wherein R is hydrogen, alkyl, cycloalkyl, bicycloalkyl or aryl e.g. phenyl. The hydroxy group of the product may be converted to derivatives e.g. esters and ethers to form additional ligands. The hydroxy group of the product also may be converted to a reducible group e.g. the methoxy ether and the ether replaced by hydrogen in the reduction. The reduction product wherein R of the starting material is hydrogen can be coupled with a ketone in the process to provide 2,9-disubstituted 1,10-phenanthroline ligands. The ligands provided are preferably in chiral form and complex with metals, e.g. transition metals, which serve as catalysts in many processes such as addition and substitution reactions.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: May 4, 2004
    Assignee: University of Notre Dame
    Inventor: Paul Helquist
  • Patent number: 5587475
    Abstract: Derivatized type A virginiamycins having a reactive functionalized side chain, and a process for making the virginiamycin derivatives. The side chain contains a thioether linkage and a reactive group, such as a carboxylate ester or free carboxylic acid group.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: December 24, 1996
    Assignee: University of Notre Dame
    Inventors: Paul Helquist, Carlo Cocito