Patents by Inventor Richard R. Tidwell

Richard R. Tidwell 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: 8188121
    Abstract: Novel aza analogues of dicationic terphenyl compounds for use in combating microbial infections are described. The compounds include those of Formula (III): wherein one of A1, Y1, and Z1 is N; Ar1 is phenylene; and Ar3 is a nitrogen-containing aromatic group.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: May 29, 2012
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: Richard R. Tidwell, David W. Boykin, W. David Wilson, Reto Brun, Karl Werbovetz, Mohamed A. Ismail, Reem K. Arafa, Laixing Hu
  • Patent number: 8101636
    Abstract: Novel aza analogues of dicationic terphenyl compounds for use in combating microbial infections are described. Also described are processes for synthesizing the compounds.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: January 24, 2012
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: Richard R. Tidwell, David W. Boykin, W. David Wilson, Reto Brun, Karl Werbovetz, Mohamed A. Ismail, Reem K. Arafa
  • Publication number: 20110257199
    Abstract: Novel dicationic terphenyl compounds and their aza analogues. Methods for combating microbial infections with novel dicationic terphenyl compounds and their aza analogues. Processes for synthesizing novel dicationic terphenyl compounds and their aza analogues.
    Type: Application
    Filed: June 17, 2011
    Publication date: October 20, 2011
    Inventors: Richard R. Tidwell, David W. Boykin, W. David Wilson, Reto Brun, Karl Werbovetz, Mohamed A. Ismail, Reem K. Arafa, Laixing Hu
  • Patent number: 7964619
    Abstract: Disclosed herein are novel dicationic teraryl compounds and their aza analogues, including compounds of Formula (IIe): wherein p and q are each 0 and each A, Y and Z is CR4. An exemplary compound of Formula (IIe) is: Methods for combating microbial infections, such as parasitic Leishmania species, with novel dicationic terphenyl compounds and their aza analogues are included. Processes for synthesizing novel dicationic terphenyl compounds and their aza analogues are disclosed along with methods for evaluation of the compounds as potential anti-protozoan agents.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: June 21, 2011
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: Richard R. Tidwell, David W. Boykin, W. David Wilson, Reto Brun, Laixing Hu, Karl Werbovetz, Mohamed A. Ismail, Reem K. Arafa
  • Patent number: 7951827
    Abstract: Novel dicationic 3,5-diphenylisoxazole compounds are described. Synthetic routes to these novel compounds are provided. Several of the compounds displayed in vitro activity versus Trypanosoma brucei brucei and Plasmodium falciparum comparable to that of furamidine. A majority of the novel compounds also were less toxic to VERO cells than furamidine.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: May 31, 2011
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Richard R. Tidwell, Svetlana M. Bakunova, Stanislav Bakunov, Donald A. Patrick
  • Publication number: 20100331368
    Abstract: Novel dicationic 2,5-diaryl selenophene compounds are described. Also described are novel aza analogues of dicationic 2,5-diaryl thiophenes. The presently disclosed dicationic compounds exhibit in vitro activity versus Trypanosoma brucei rhodesiense, Plasmodium falciparum, and/or Leishmania donovani comparable to that of pentamidine and furamidine. Some of the novel dicationic compounds display good activity in vivo in a murine model of a Trypanosoma brucei rhodesiense infection.
    Type: Application
    Filed: October 17, 2008
    Publication date: December 30, 2010
    Inventors: Richard R. Tidwell, David W. Boykin, Chad E. Stephens, Mohamed A. Ismail, Arvind Kumar, W. David Wilson, Reto Brun, Karl Werbovetz
  • Patent number: 7825279
    Abstract: Novel fused ring dicationic anti-protozoan compounds. Representative protozoan species include but are not limited to Trypanosoma brucei rhodesiense (T.b.r.) and Plasmodium falciparum. Prodrugs of these compounds can be used as an oral treatment for malaria and human African trypanosomiasis.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: November 2, 2010
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: David W. Boykin, Richard R. Tidwell, W. David Wilson, Reto Brun, Reem K. Arafa, Chad E. Stephens
  • Publication number: 20100249175
    Abstract: Dicationic compounds that are highly selective for binding G-quadruplex DNA are described. Several compounds exhibit groove binding toward G-quadruplex DNA and in vitro and in vivo activity versus Trypanosoma brucei rhodesiense. The compounds represent novel drugs for the treatment of cancer, malaria, leishmania, and trypanosomiasis.
    Type: Application
    Filed: June 29, 2006
    Publication date: September 30, 2010
    Inventors: W. David Wilson, David W. Boykin, Elizabeth W. White, Mohamed A. Ismail, Arvind Kumar, Rupesh Nanjunda, Richard R. Tidwell
  • Patent number: 7745456
    Abstract: The present invention relates to novel 2,5-bis{[alkyl (or aryl) imino] aminophenyl}furans and thiophenes of the general formula in which R1, R2, R3 and R4 are each independently selected from the group consisting of H, alkyl, alkoxy, halide, and alkylhalide groups; R5 is H, alkyl or aryl; R6 is H, alkyl, aryl, or NR7R8, in which R7 and R8 are each independently selected from the group consisting of H, alkyl and aryl; and X is O, S or NR9, in which R9 is H or alkyl, and to the use of such compounds.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: June 29, 2010
    Assignees: The University of North Carolina at Chapel Hill, Duke University, Georgia State University Research Foundation, Inc.
    Inventors: David W. Boykin, Richard R. Tidwell, W. David Wilson, John R. Perfect, Chad F. Stephens
  • Patent number: 7517893
    Abstract: Novel dicationic bichalcophene compounds are described. The presently disclosed novel dicationic bichalcophene compounds exhibit in vitro activity versus Trypanosoma brucei rhodesiense, Plasmodium falciparum, or Leishmania donovani comparable to that of pentamidine and furamidine. Some of the novel dicationic bichalcophene compounds displayed good activity in vivo in a murine model of a Trypanosoma brucei rhodesiense infection.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: April 14, 2009
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: Richard R. Tidwell, David W. Boykin, Chad Stephens, Mohamed A. Ismail, W. David Wilson, Reto Brun, Karl Werbovetz
  • Patent number: 7432278
    Abstract: A method for treating a microbial infection, including an infection from a protozoan pathogen, such as Trypanosoma brucei rhodesiense and Plasmodium falciparum, in a subject in need thereof by administering to the subject an effective amount of a dicationic imidazopyridine compound or a dicationic tetrahydro-imidazopyridine compound. Processes for synthesizing dicationic imidazopyridines and dicationic tetrahydro-imidazopyridines and the novel dicationic imidazopyridine and dicationic tetrahydro-imidazopyridine compounds themselves.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: October 7, 2008
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: David W. Boykin, Richard R. Tidwell, W. David Wilson, Mohamed A. Ismail
  • Publication number: 20080221191
    Abstract: A method of treating a Mycobacterium tuberculosis infection in a subject in need thereof by administering to the subject an effective amount of a cationic substituted benzofuran compound. Methods of treating microbial infections, including infections from protozoan pathogens, such as Leishmania donovani, Trypanosoma brucei rhodesiense, a Trypanosoma cruzi, and Plasmodium falciparum, and fungal pathogens, such as Candida albicans, Aspergillus fumigatus, and Cryptococcus neoformans, in a subject in need thereof by administering to the subject an effective amount of a cationic substituted benzofuran compound. Methods of synthesizing novel cationic substituted benzofuran compounds and the novel compounds themselves.
    Type: Application
    Filed: October 31, 2007
    Publication date: September 11, 2008
    Inventors: Richard R. Tidwell, Karl Werbovetz, Scott Gary Franzblau, Svetlana Bakunova, Stanislav Bakunov
  • Patent number: 7417158
    Abstract: A method of treating a Mycobacterium tuberculosis infection in a subject in need thereof by administering to the subject an effective amount of a cationic substituted benzofuran compound. Methods of treating microbial infections, including infections from protozoan pathogens, such as Leishmania donovani, Trypanosoma brucei rhodesiense, a Trypanosoma cruzi, and Plasmodium falciparum, and fungal pathogens, such as Candida albicans, Aspergillus fumigatus, and Cryptococcus neoformans, in a subject in need thereof by administering to the subject an effective amount of a cationic substituted benzofuran compound. Methods of synthesizing novel cationic substituted benzofuran compounds and the novel compounds themselves.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: August 26, 2008
    Assignee: The University of North Carolina at Chapel Hill
    Inventors: Richard R. Tidwell, Karl Werbovetz, Scott Gary Franzblau, Svetlana Bakunova, Stanislav Bakunov
  • Patent number: 7410989
    Abstract: The present invention relates to novel compounds and methods that are useful in treating members of the Flaviviridae family of viruses. Compounds of the present invention will have a structure according to Formulas (I)-(VI) as recited throughout the application.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: August 12, 2008
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc., Auburn University
    Inventors: Christine C. Dykstra, Maurice Daniel Givens, David A. Stringfellow, Kenny Brock, David Boykin, Arvid Kumar, W. David Wilson, Richard R. Tidwell, Chad F. Stephens
  • Patent number: 7410999
    Abstract: The present invention relates to novel compounds and methods that are useful in treating members of the Flaviviridae family of viruses. Compounds of the present invention will have a structure according to Formulas (I)-(VI) as recited throughout the application.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: August 12, 2008
    Assignees: University of North Carolinia at Chapel Hill, Georgia State University Research Foundation, Inc., Auburn University
    Inventors: Christine C. Dykstra, Maurice Daniel Givens, David A. Stringfellow, Kenny Brock, David Boykin, Arvid Kumar, W. David Wilson, Richard R. Tidwell, Chad F. Stephens
  • Patent number: 7256203
    Abstract: A compound of Formula (I): wherein: X is selected from the group consisting of O, S, and NR17, where R17 is hydrogen or lower alkyl; A and Y are CH, N, NR17, O, or S; C1 and C2 are each C or N, wherein C1 and C2 are the same or different; D1 and D2 are each C or N, wherein D1 and D2 are the same or different; B and Z are CH, N, or NR17, provided that B, Z, or both B and Z are not present when A, Y, or both A and Y are O, S, or NR17; R13, R14, R1 and R8 can be present or absent, and when present are selected from the group consisting of H, lower alkyl, halogen, alkoxyl, aryloxyl, aralkoxy and hydroxyl; R15 and Rare selected from the group consisting of H, lower alkyl, halogen, alkoxyl, aryloxyl, aralkoxy and hydroxyl; R3 and R6 are each independently selected from the group consisting of H, hydroxy, lower alkyl, cycloalkyl, aryl, aralkyl, alkoxyl, hydroxycycloalkyl, alkoxycycloalkyl, hydroxyalkyl, aminoalkyl, acyloxy, acetoxy, and alkylaminoalkyl; and R2, R4, R5 and R7 are each independently selected fr
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: August 14, 2007
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: David W. Boykin, Richard R. Tidwell, Mohamed A. Ismail, Reto Brun
  • Patent number: 7241795
    Abstract: The present invention relates to novel 2,5-bis{[alkyl (or aryl) imino]aminophenyl}furans and thiophenes of the general formula in which R1, R2, R3 and R4 are each independently selected from the group consisting of H, alkyl, alkoxy, halide, and alkylhalide groups; R5 is H, alkyl or aryl; R6 is H, alkyl, aryl, or NR7R8, in which R7 and R8 are each independently selected from the group consisting of H, alkyl and aryl; and X is O, S or NR9, in which R9 is H or alkyl, and to the use of such compounds.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: July 10, 2007
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc., Duke University
    Inventors: David W. Boykin, Richard R. Tidwell, W. David Wilson, John R. Perfect, Chad F. Stephens
  • Patent number: 7183286
    Abstract: The present invention relates to novel compounds and methods that are useful in treating members of the Flaviviridae family of viruses. Compounds of the present invention will have a structure according to Formulas (I)–(VI) as recited throughout the application.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: February 27, 2007
    Assignees: The University of North Carolina at Chapel Hill, Auburn University, Georgia State University Research Foundation, Inc.
    Inventors: Christine C. Dykstra, Maurice Daniel Givens, David A. Stringfellow, Kenny Brock, David W. Boykin, Arvid Kumar, W. David Wilson, Richard R. Tidwell, Chad F. Stephens
  • Patent number: 7163955
    Abstract: The present invention relates to novel compounds and methods that are useful in treating members of the Flaviviridae family of viruses. Compounds of the present invention will have a structure according to Formulas (I)–(VI) as recited throughout the application.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: January 16, 2007
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc., Auburn University
    Inventors: Christine C. Dykstra, Maurice Daniel Givens, David A. Stringfellow, Kenny Brock, David Boykin, Arvid Kumar, W. David Wilson, Richard R. Tidwell, Chad F. Stephens
  • Patent number: 7160914
    Abstract: Asymmetric derivatives of furamidines with one of the phenyl rings of furamidine replaced with a benzimidazole have been found by quantitative footprinting analyses to bind GC containing sites on DNA more strongly than to pure AT sequences. These compounds have been shown to bind in the minor groove at specific GC containing sequences of DNA in a highly cooperative manner as a stacked dimer. Compounds of the present invention find use in selectively binding mixed sequence DNA, and may also be used in methods of regulating gene expression, methods of treating opportunistic infections and cancer, as well as in methods of detecting certain sequences of DNA.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: January 9, 2007
    Assignees: The University of North Carolina at Chapel Hill, Georgia State University Research Foundation, Inc.
    Inventors: W. David Wilson, David W. Boykin, Richard R. Tidwell