Patents by Inventor Lijun Sun

Lijun Sun 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: 20050107436
    Abstract: The invention relates to compounds of formula (I): or a pharmaceutically acceptable salt, solvate, clathrate, or prodrug thereof wherein X, Y, A, Z, L and n are defined herein. These compounds are useful as immunosuppressive agents and for treating and preventing inflammatory conditions and immune disorders.
    Type: Application
    Filed: July 22, 2004
    Publication date: May 19, 2005
    Inventors: Yu Xie, Mats Holmqvist, Jerome Mahiou, Mitsunori Ono, Lijun Sun, Shoujun Chen, Shijie Zhang, Jun Jiang, Dinesh Chimmanamada, Chih-Yi Yu
  • Patent number: 6861436
    Abstract: Disclosed is a compound represented by Structural Formula (I): Ring A is substituted or unsubstituted and optionally fused to an aryl group. Z1 and Z2 are independently ?O, ?S, ?N—OR12 or ?NR12 R1 and R2 are independently —H, an aliphatic group, a substituted aliphatic group, an unsubstituted non-aromatic heterocylic group, a substituted non-aromatic heterocylic group, an aryl group or a substituted aryl group, provided that R1 and R2 are not both —H. Alternatively, —NR1R2, taken together, is a substituted or unsubstituted non-aromatic nitrogen-containing heterocyclic group or a substituted or unsubstituted nitrogen-containing heteroaryl group. R3 is a substituted or unsubstituted aryl group or a substituted or unsubstituted aliphatic group. X is a covalent bond, —C(R4R5)—, —N(R4)—, —O—, —S—, —S(O)—, —S(O)2—, —C(?O)—, —C(?O)—N(R4)—, or —N(R4)—C(?O)—. R4 and R5 are independently —H or a substituted or unsubstituted aliphatic group. R12 is —H or a substituted or unsubstituted alkyl group.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: March 1, 2005
    Assignee: Synta Pharmaceuticals Corp.
    Inventors: Keizo Koya, Lijun Sun, Mitsunori Ono, Weiwen Ying, Hao Li
  • Patent number: 6858606
    Abstract: This invention features pyrimidine compounds of formula (I): R1 is in which one of Ra and Rb is H or alkyl, and the other is aryl or heteroaryl optionally substituted with Rd and Rem; each of R2 and R4 is H; R3 is H, alkyl, aryl, heteroaryl, cyclyl, heterocyclyl, or alkylcarbonyl; R5 is H or alkyl; n is 0, 1, 2, 3, 4, 5, or 6; X is NRc; Y is covalent bond, CH2, C(O), C?N—Rc, C?N—ORc, C?N—SRc, O, S, S(O), S(O2), or NRc; Z is N or CH; one of U and V is N, and the other is CRc; and W is O, S, S(O), S(O2), NRc, or NC(O)Rc; in which Rc is H, alkyl, aryl, heteroaryl, cyclyl, heterocyclyl, or alkylcarbonyl; Rd is halogen, CN, alkyl alkyloxy, alkylcarbonyl, alkyloxycarbonyl, aryloxycarbonyl, heteroaryloxycarbonyl, hydroxyalkyl, alkylamino, or alkylaminocarbonyl; Re is halogen, CN, hydroxyl, alkyl, aryl, heteroaryl, alkoxyl, aryloxyl, or heteroaryloxyl; and m is 0, 1, 2, 3, or 4. The pyrimidine compounds can be used to treat an IL-12 overproduction-related disorder (e.g.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: February 22, 2005
    Assignee: Synta Pharmaceutical Corp.
    Inventors: Lijun Sun, Mitsunori Ono, Elena Kostik, Yumiko Wada
  • Publication number: 20050014754
    Abstract: This invention relates to fused pyrrole compounds of Formula (I): and pharmaceutically acceptable salts and prodrugs thereof, wherein V1, V2, V3, V4, R1, R2, R3, W1 and W2 are as defined herein. The compounds of this invention may be used to prevent or treat cancer, inflammatory disorders, autoimmune diseasesand other conditions involving PDE4 or elevated levels of cytokines. The invention also provides methods of using the compounds to treat or prevent such disorders and pharmaceutical compositions containing the compounds.
    Type: Application
    Filed: March 12, 2004
    Publication date: January 20, 2005
    Inventors: Mitsunori Ono, Lijun Sun, ZhiQiang Xia, Elena Kostik, Keizo Koya, Masazumi Nagai, Yaming Wu
  • Publication number: 20050009920
    Abstract: Disclosed is a compound represented by the Structural Formula (I): Y is a covalent bond, a phenylene group or a substituted or unsubstituted straight chained hydrocarbyl group. In addition, Y, taken together with both >C?Z groups to which it is bonded, is a substituted or unsubstituted aromatic group. Preferably, Y is a covalent bond or —C(R7R8)—. R1 and R2 are independently an aryl group or a substituted aryl group, R3 and R4 are independently —H, an aliphatic group, a substituted aliphatic group, an aryl group or a substituted aryl group. R5-R6 are independently —H, an aliphatic group, a substituted aliphatic group, an aryl group or a substituted aryl group. R7 and R8 are each independently —H, an aliphatic or substituted aliphatic group, or R7 is —H and R8 is a substituted or unsubstituted aryl group, or, R7 and R8, taken together, are a C2-C6 substituted or unsubstituted alkylene group. Z is ?0 or ?S.
    Type: Application
    Filed: May 14, 2004
    Publication date: January 13, 2005
    Applicant: Synta Pharmaceuticals Corp.
    Inventors: Keizo Koya, Lijun Sun, Shoujun Chen, Noriaki Tatsuta, Yaming Wu, Mitsunori Ono
  • Patent number: 6825235
    Abstract: Disclosed is a method of preparing a thiohydrazide product compound from a hydrazide starting compound. The hydrazide starting compound is represented by Structural Formula (I): The thiohydrazide product compound is represented by Structural Formula (II): In Structural Formulas (I)-(II), R1 and R2 are independently an aliphatic group, a substituted aliphatic group, an aryl group or a substituted aryl group, or R1 and R2 taken together with the carbon and nitrogen atoms to which they are bonded, form a non-aromatic heterocyclic ring optionally fused to an aromatic ring. When R2 is an aryl group or a substituted aryl group, then R5 is a hydrazine protecting group; and when R2 is an aliphatic or substituted aliphatic group, then R5 is —H or a hydrazine protecting group. R10 is —H or a substituted or unsubstituted alkyl group. The method comprising the step of reacting the starting compound with a thionylating reagent.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: November 30, 2004
    Assignee: Synta Pharmaceuticals Corp.
    Inventors: Shoujun Chen, Lijun Sun, Zhi-Qiang Xia, Keizo Koya, Mitsunori Ono
  • Publication number: 20040235909
    Abstract: One embodiment of the present invention is a compound represented by the Structural Formula (I): 1
    Type: Application
    Filed: March 18, 2004
    Publication date: November 25, 2004
    Applicant: Synta Pharmaceuticals, Inc.
    Inventors: Keizo Koya, Lijun Sun, Shoujun Chen, Noriaki Tatsuta, Yaming Wu, Mitsunori Ono, Zhi-Qiang Xia
  • Publication number: 20040229952
    Abstract: Disclosed is a method of preparing a thiohydrazide product compound from a hydrazide starting compound.
    Type: Application
    Filed: March 24, 2004
    Publication date: November 18, 2004
    Applicant: Synta Pharmaceuticals Corp.
    Inventors: Shoujun Chen, Lijun Sun, Zhi-Qiang Xia, Keizo Koya, Mitsunori Ono
  • Publication number: 20040225016
    Abstract: One embodiment of the present invention is a method of treating a subject with a multi-drug resistant cancer.
    Type: Application
    Filed: January 15, 2004
    Publication date: November 11, 2004
    Applicant: Synta Pharmaceuticals Corporation
    Inventors: Keizo Koya, Lijun Sun, Yaming Wu, Timothy Korbut, Dan Zhou, Zhenjian Du, Shoujun Chen, Noriaki Tatsuta, Guiqing Liang, Mitsunori Ono
  • Publication number: 20040214850
    Abstract: Disclosed is a compound represented by Structural Formula (I): 1
    Type: Application
    Filed: May 20, 2004
    Publication date: October 28, 2004
    Applicant: Synta Pharmaceuticals Corp.
    Inventors: Keizo Kova, Lijun Sun, Mitsunori Ono, Weiwen Ying, Hao Li
  • Publication number: 20040204594
    Abstract: This invention relates to preparation of enantio-enriched compounds, and more particularly to enantio-enriched kavalactone compounds and derivatives thereof. The methods provide compounds that are useful as reagents, or building blocks, in the construction of other enantio-enriched compounds.
    Type: Application
    Filed: January 12, 2004
    Publication date: October 14, 2004
    Inventors: Shoujun Chen, Lijun Sun, Joel McCleary
  • Publication number: 20040198725
    Abstract: This invention features a compound of formula (I): 1
    Type: Application
    Filed: October 14, 2003
    Publication date: October 7, 2004
    Inventors: Lijun Sun, Mitsunori Ono, Yumiko Wada, Weiwen Ying, Teresa Przewloka, Elena Kostik
  • Patent number: 6800660
    Abstract: Disclosed is a compound represented by the Structural Formula (I): Y is a covalent bond, a phenylene group or a substituted or unsubstituted straight chained hydrocarbyl group. In addition, Y, taken together with both >C═Z groups to which it is bonded, is a substituted or unsubstituted aromatic group. Preferably, Y is a covalent bond or —C(R7R8)—. R1 and R2 are independently an aryl group or a substituted aryl group, R3 and R4 are independently —H, an aliphatic group, a substituted aliphatic group, an aryl group or a substituted aryl group. R5-R6 are independently —H, an aliphatic group, a substituted aliphatic group, an aryl group or a substituted aryl group. R7 and R8 are each independently —H, an aliphatic or substituted aliphatic group, or R7 is —H and R8 is a substituted or unsubstituted aryl group, or, R7 and R8, taken together, are a C2-C6 substituted or unsubstituted alkylene group. Z is ═O or ═S.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: October 5, 2004
    Assignee: Synta Pharmaceuticals Corp.
    Inventors: Keizo Koya, Lijun Sun, Shoujun Chen, Noriaki Tatsuta, Yaming Wu, Mitsunori Ono
  • Publication number: 20040186129
    Abstract: Disclosed is a compound represented by Structural Formula (I): 1
    Type: Application
    Filed: March 16, 2004
    Publication date: September 23, 2004
    Inventors: Keizo Koya, Lijun Sun, Mitsunori Ono, David James, Weiwen Ying, Shoujun Chen
  • Publication number: 20040152897
    Abstract: Disclosed are methods of preparing substituted indolizines represented by the following formula: 1
    Type: Application
    Filed: September 11, 2003
    Publication date: August 5, 2004
    Applicant: Synta Pharmaceuticals Corp.
    Inventors: Lijun Sun, Keizo Koya, Zhi-Qiang Xia, Teresa Przewloka, Shijie Zhang, Mitsunori Ono
  • Patent number: 6762204
    Abstract: One embodiment of the present invention is a compound represented by the Structural Formula (I): Y is a covalent bond of a substituted or unsubstituted straight chained hydrocarbyl group. In addition, Y, taken together with both >C═Z groups to which it is bonded, is a substituted or unsubstituted aromatic group. Preferably, Y is a covalent bond or —C(R7R8)—. R1 is an aliphatic group, a substituted aliphatic group, a non-aromatic heterocyclic group, or a substituted non-aromatic heterocyclic group, R2-R4 are independently —H, an aliphatic group, a substituted aliphatic group, a non-aromatic heterocyclic group, a substituted non-aromatic heterocyclic group, an aryl group or a substituted aryl group, or R1 and R3 taken together with the carbon and nitrogen atoms to which they are bonded, and/or R2 and R4 taken together with the carbon and nitrogen atoms to which they are bonded, form a non-aromatic heterocyclic ring optionally fused to an aromatic ring.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: July 13, 2004
    Assignee: Synta Pharmaceuticals, Inc.
    Inventors: Keizo Koya, Lijun Sun, Shoujun Chen, Noriaki Tatsuta, Yaming Wu, Mitsunori Ono, Zhi-Qiang Xia
  • Publication number: 20040116462
    Abstract: This invention relates to indolizine compounds having formula 1
    Type: Application
    Filed: December 12, 2002
    Publication date: June 17, 2004
    Inventors: Mitsunori Ono, Lijun Sun, Zhi Qiang Xia, Hao Li, Shojun Chen, Masazumi Nagai, Rongzhen Lu
  • Patent number: 6743919
    Abstract: Disclosed is a compound represented by Structural Formula (I): R1 is a substituted or unsubstituted 2-imidazolyl group which is optionally fused to a substituted or unsubstituted aryl group. Z1 is ═O, ═S, ═NOR11, or ═NR11. R is represented by a Structural Formula selected from (II)-(VII): The variables in Structural Formulas (II)-(VII) are described below.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: June 1, 2004
    Assignee: Synta Pharmaceuticals Corp.
    Inventors: Keizo Koya, Lijun Sun, Mitsunori Ono, David James, Weiwen Ying, Shoujun Chen
  • Publication number: 20040053937
    Abstract: This invention features pyrimidine compounds of formula (I): 1 2
    Type: Application
    Filed: September 5, 2003
    Publication date: March 18, 2004
    Applicant: Synta Pharmaceuticals Corp.
    Inventors: Lijun Sun, Mitsunori Ono, Teresa Przewloka, Elena Kostik, Yumiko Wada
  • Publication number: 20040053926
    Abstract: This invention relates to triazine compounds of formula (I): 1
    Type: Application
    Filed: September 5, 2003
    Publication date: March 18, 2004
    Applicant: Synta Pharmaceuticals Corp., a Delaware Corporation
    Inventors: M. Ono, Lijun Sun, Shijie Zhang, Teresa Przewloka, David A. James, Wenli Ding, Yumiko Wada