Patents by Inventor Yao-Ling Qiu

Yao-Ling Qiu 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).

  • Publication number: 20080039406
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Application
    Filed: July 26, 2007
    Publication date: February 14, 2008
    Inventors: Yao-Ling Qiu, Tongzhu Liu, Yat Or, Ly Phan
  • Publication number: 20070244160
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Application
    Filed: June 5, 2007
    Publication date: October 18, 2007
    Inventors: Yat Sun Or, Wang Guoqiang, Ly Tam Phan, Deqiang Niu, Nha Huu Vo, Yao-Ling Qiu, Yanchun Wang, Marina Busuyek, Ying Hou, Yulin Peng, Heejin Kim, Tongzhu Liu, Jay Judson Farmer, Guoyou Xu
  • Patent number: 7273853
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: September 25, 2007
    Assignee: Enanta Pharmaceuticals, Inc.
    Inventors: Yat Sun Or, Guoqiang Wang, Ly Tam Phan, Deqiang Niu, Nha Huu Vo, Yao-Ling Qiu, Yanchun Wang, Marina Busuyek, Ying Hou, Yulin Peng, Heejin Kim, Tongzhu Liu, Jay Judson Farmer, Guoyou Xu
  • Patent number: 7265094
    Abstract: The present invention discloses compounds of formula I, II, III, or IV, or a racemate, enantiomer, regioisomer, salt, ester or prodrug thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: September 4, 2007
    Assignee: Enanta Pharmaceuticals, Inc.
    Inventors: Yao-Ling Qiu, Deqiang Niu, Zhe Wang, Ly Tam Phan, Yat Sun Or
  • Publication number: 20060252710
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes processes by which to make the compounds of the present invention.
    Type: Application
    Filed: May 4, 2005
    Publication date: November 9, 2006
    Inventors: Guoqiang Wang, Ly Phan, Yat Or, Yao-Ling Qiu, Deqiang Niu, Yulin Peng, Marina Busuyek, Yanchun Wang, Suanne Nakajima
  • Publication number: 20060252712
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes processes by which to make the compounds of the present invention.
    Type: Application
    Filed: May 3, 2006
    Publication date: November 9, 2006
    Inventors: Guoqiang Wang, Ly Phan, Yat Or, Yao-ling Qiu, Deqiang Niu, Yulin Peng, Marina Busuyek, Yanchun Wang, Suanne Nakajima
  • Publication number: 20060247440
    Abstract: The present invention relates generally to novel methods for the synthesis of O-(6-pyrazol-1-yl-pyridin-3-ylmethyl)-hydroxylamine which is an essential reagent in the synthesis of one of the bridged erythromycin derivatives and their respective pharmaceutically acceptable salts in PCT Application WO 03/097659 A1.
    Type: Application
    Filed: August 17, 2005
    Publication date: November 2, 2006
    Inventors: Datong Tang, Yao-Ling Qiu, Heejin Kim, Yat Or, Zhe Wang
  • Patent number: 7129221
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: October 31, 2006
    Assignee: Enanta Pharmaceuticals, Inc.
    Inventors: Yat Sun Or, Guoqiang Wang, Ly Tam Phan, Deqiang Niu, Yao-Ling Qiu, Nha Huu Vo, Jay Judson Farmer, Ying Hou
  • Patent number: 7064110
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: June 20, 2006
    Assignee: Enanta Pharmaceuticals, Inc.
    Inventors: Yat Sun Or, Wang Guoqiang, Ly Tam Phan, Deqiang Niu, Nha Huu Vo, Yao-Ling Qiu, Yanchun Wang, Marina Busuyek, Ying Hou, Yulin Peng, Heejin Kim, Tongzhu Liu, Jay Judson Farmer, Guoyou Xu
  • Publication number: 20060122203
    Abstract: Compounds which are active against viruses have the following Formulas: wherein B is a purine or pyrimidine heterocyclic ring and is preferably selected from the group consisting of 6-aminopurine (adenine), 2,6-diaminopurine, 2-amino-6-azidopurine, 2-amino-6-cyclopropylaminopurine, 6-hydroxypurine (hypoxanthine), 2-amino-6-halo substituted purines, 2-amino-6-alkoxy substituted purines, 2-amino-6-hydroxypurine (guanine), 3-deazapurines, 7-deaza-purines, 8-azapurines, cytosine, 5-halo substituted cytosines, 5-alkyl substituted cytosines, thymine, uracil and 6-azapyrimidines; X is O; and, R1 and R2 are alkyl or aryl groups. The compounds of the present invention also include the R- and S-enantiomers of the above compounds. The R1X and/or R2X can also be amino acid residues with X as NH.
    Type: Application
    Filed: October 25, 2005
    Publication date: June 8, 2006
    Inventors: Jiri Zemlicka, Yao-Ling Qiu, John Drach, Roger Ptak
  • Publication number: 20060069048
    Abstract: The present invention discloses compounds of formulae I and II, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Application
    Filed: September 27, 2005
    Publication date: March 30, 2006
    Inventors: Yat Or, Yao-Ling Qiu, Guoqiang Wang, Deqiang Niu, Ly Phan
  • Patent number: 6958345
    Abstract: Compounds which are active against viruses have the following Formulas: wherein B is a purine or pyrimidine heterocyclic ring and is preferably selected from the group consisting of 6-aminopurine (adenine), 2,6-diaminopurine, 2-amino-6-azidopurine, 2-amino-6-cyclopropylaminopurine, 6-hydroxypurine (hypoxanthine), 2-amino-6-halo substituted purines, 2-amino-6-alkoxy substituted purines, 2-amino-6-hydroxypurine (guanine), 3-deazapurines, 7-deaza-purines, 8-azapurines, cytosine, 5-halo substituted cytosines, 5-alkyl substituted cytosines, thymine, uracil and 6-azapyrimidines; X is O; and, R1 and R2 are alkyl or aryl groups. The compounds of the present invention also include the R- and S-enantiomers of the above compounds. The R1X and/or R2X can also be amino acid residues with X as NH.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: October 25, 2005
    Assignees: The Regents of the University of Michigan, Wayne State University
    Inventors: Jiri Zemlicka, Yao-Ling Qiu, John C. Drach, Roger G. Ptak
  • Publication number: 20050171033
    Abstract: The present invention discloses compounds of formula I, II, III, or IV, or a racemate, enantiomer, regioisomer, salt, ester or prodrug thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Application
    Filed: January 7, 2005
    Publication date: August 4, 2005
    Applicant: Enanta Pharmaceuticals, Inc.
    Inventors: Yao-Ling Qiu, Deqiang Niu, Zhe Wang, Ly Phan, Yat Or
  • Publication number: 20050159370
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Application
    Filed: January 25, 2005
    Publication date: July 21, 2005
    Applicant: Enanta Pharmaceuticals, Inc.
    Inventors: Yat Or, Guoqiang Wang, Ly Phan, Deqiang Niu, Nha Vo, Yao-Ling Qiu, Yanchun Wang, Marina Busuyek, Ying Hou, Yulin Peng, Heejin Kim, Tongzhu Liu, Jay Farmer, Guoyou Xu
  • Patent number: 6878691
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: April 12, 2005
    Assignee: Enanta Pharmaceuticals, Inc.
    Inventors: Yat Sun Or, Guoqiang Wang, Ly Tam Phan, Deqiang Niu, Nha Huu Vo, Yao-Ling Qiu, Yanchun Wang, Marina Busuyek, Ying Hou, Yulin Peng, Heejin Kim, Tongzhu Liu, Jay Judson Farmer, Guoyou Xu
  • Publication number: 20050037982
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: which exhibit antibacterial properties. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject in need of antibiotic treatment. The invention also relates to methods of treating a bacterial infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention. The invention further includes process by which to make the compounds of the present invention.
    Type: Application
    Filed: May 5, 2003
    Publication date: February 17, 2005
    Inventors: Yat Or, Guoqiang Wang, Ly Phan, Deqiang Niu, Nha Vo, Yao-Ling Qiu, Yanchun Wang, Marina Busuyek, Ying Hou, Yulin Peng, Heejin Kim, Tongzhu Liu, Jay Farmer, Guoyou Xu
  • Publication number: 20050020823
    Abstract: There are described novel 5-O-mycaminosyltylonide (OMT) analogs possessing increased antibacterial activity toward Gram positive and Gram negative bacteria as well as macrolide resistant Gram positives and pharmaceutically acceptable compositions comprising a therapeutically effective amount of a compound of the invention in combination with a pharmaceutically acceptable carrier.
    Type: Application
    Filed: May 7, 2004
    Publication date: January 27, 2005
    Inventors: Ly Phan, Yao-Ling Qiu, Yat Or, Nha Vo, Tianying Jian, Ying Hou, Marina BusuyeK
  • Publication number: 20050009842
    Abstract: Compounds which are active against viruses have the following Formulas: wherein B is a purine or pyrimidine heterocyclic ring and is preferably selected from the group consisting of 6-aminopurine (adenine), 2,6-diaminopurine, 2-amino-6-azidopurine, 2-amino-6-cyclopropylaminopurine, 6-hydroxypurine (hypoxanthine), 2-amino-6-halo substituted purines, 2-amino-6-alkoxy substituted purines, 2-amino-6-hydroxypurine (guanine), 3-deazapurines, 7-deaza-purines, 8-azapurines, cytosine, 5-halo substituted cytosines, 5-alkyl substituted cytosines, thymine, uracil and 6-azapyrimidines; X is 0; and, R1 and R2 are alkyl or aryl groups. The compounds of the present invention also include the R- and S-enantiomers of the above compounds. The R,X and/or R2X can also be amino acid residues with X as NH.
    Type: Application
    Filed: August 6, 2004
    Publication date: January 13, 2005
    Inventors: Jiri Zemlicka, Yao-Ling Qiu, John Drach, Roger Ptak
  • Publication number: 20040254126
    Abstract: The present invention discloses compounds of formula I, or pharmaceutically acceptable salts, esters, or prodrugs thereof: 1
    Type: Application
    Filed: March 23, 2004
    Publication date: December 16, 2004
    Inventors: Yao-Ling Qiu, Ly Tam Phan, Zhigang Chen, Tongzhu Liu, Yat Sun Or
  • Publication number: 20040235760
    Abstract: There are described novel 5-O-mycaminosyltylonide derivatives and pharmaceutically acceptable compositions comprising a therapeutically effective amount of a compound of the invention in combination with a pharmaceutically acceptable carrier. Also described are a method for treating bacterial infections by administering to an animal a pharmaceutical composition containing a therapeutically-effective amount of a compound of the invention, and processes for the preparation of such compounds.
    Type: Application
    Filed: March 9, 2004
    Publication date: November 25, 2004
    Inventors: Ly Tam Phan, Nha Vo, Yat Sun Or, Yao-Ling Qiu, Ying Hou