Patents by Inventor Pasit Phiasivongsa

Pasit Phiasivongsa 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: 7790746
    Abstract: Quinoline derivatives, particularly 4-anilinoquinoline derivatives of formula (I), are provided: Such quinoline derivatives can be used for modulation of DNA methylation, such as effective inhibition of methylation of cytosine at the C-5 position, for example via selective inhibition of DNA methyltransferase DNMT 1. Methods for synthesizing numerous 4-anilinoquinoline derivatives and for modulating DNA methylation are provided. Also provided are methods for formulating and administering these compounds or compositions to treat conditions such as cancer and hematological disorders.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: September 7, 2010
    Assignee: SuperGen, Inc.
    Inventors: Pasit Phiasivongsa, Sanjeev G. Redkar, Swarna Gamage, Darby Brooke, William Denny, David J. Bearss, Hariprasad Vankayalapati
  • Publication number: 20100215729
    Abstract: Oligonucleotide analogues are provided that incorporate 5-aza-cytosine in the oligonucleotide sequence, e.g., in the form of 5-aza-2?-deoxycytidine (decitabine) or 5-aza-cytidine. In particular, oligonucleotide analogues rich in decitabine-deoxyguanosine islets (DpG and GpD) are provided to target the CpG islets in the human genome, especially in the promoter regions of genes susceptible to aberrant hypermethylation. Such analogues can be used for modulation of DNA methylation, such as effective inhibition of methylation of cytosine at the C-5 position. Methods for synthesizing these oligonucleotide analogues and for modulating nucleic acid methylation are provided. Also provided are phosphoramidite building blocks for synthesizing the oligonucleotide analogues, methods for synthesizing, formulating and administering these compounds or compositions to treat conditions, such as cancer and hematological disorders.
    Type: Application
    Filed: February 9, 2010
    Publication date: August 26, 2010
    Inventors: Pasit Phiasivongsa, Sanjeev Redkar
  • Publication number: 20100129320
    Abstract: Quinoline derivatives, particularly 4-anilinoquinoline derivatives, are provided. Such quinoline derivatives can be used for modulation of DNA methylation, such as effective inhibition of methylation of cytosine at the C-5 position, for example via selective inhibition of DNA methyltransferase DNMT1. Methods for synthesizing numerous 4-anilinoquinoline derivatives and for modulating DNA methylation are provided. Also provided are methods for formulating and administering these compounds or compositions to treat conditions such as cancer and hematological disorders.
    Type: Application
    Filed: September 9, 2009
    Publication date: May 27, 2010
    Applicant: SUPERGEN, INC.
    Inventors: Pasit Phiasivongsa, Sanjeev G. Redkar, Swarna Gamage, Darby Brooke, William Denny, David J. Bearss, Hariprasad Vankayalapati
  • Patent number: 7700567
    Abstract: Oligonucleotide analogues are provided that incorporate 5-aza-cytosine in the oligonucleotide sequence, e.g., in the form of 5-aza-2?-deoxycytidine (decitabine) or 5-aza-cytidine. In particular, oligonucleotide analogues rich in decitabine-deoxyguanosine islets (DpG and GpD) are provided to target the CpG islets in the human genome, especially in the promoter regions of genes susceptible to aberrant hypermethylation. Such analogues can be used for modulation of DNA methylation, such as effective inhibition of methylation of cytosine at the C-5 position. Methods for synthesizing these oligonucleotide analogues and for modulating nucleic acid methylation are provided. Also provided are phosphoramidite building blocks for synthesizing the oligonucleotide analogues, methods for synthesizing, formulating and administering these compounds or compositions to treat conditions, such as cancer and hematological disorders.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: April 20, 2010
    Assignee: Supergen, Inc.
    Inventors: Pasit Phiasivongsa, Sanjeev Redkar
  • Publication number: 20100062992
    Abstract: The present invention relates to salts of 5-azacytidine as well as methods for synthesizing the salts described herein. Pharmaceutical compositions and methods of using the 5-azacytidine salts are also provided, including methods of administering the salts or pharmaceutical compositions thereof to treat conditions, such as cancer and hematological disorders.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 11, 2010
    Applicant: SuperGen, Inc.
    Inventors: Sanjeev Redkar, Pasit Phiasivongsa
  • Publication number: 20090285772
    Abstract: Quinoline derivatives, particularly 4-anilinoquinoline derivatives, are provided. Such quinoline derivatives can be used for modulation of DNA methylation, such as effective inhibition of methylation of cytosine at the C-5 position, for example via selective inhibition of DNA methyltransferase DNMT1. Methods for synthesizing numerous 4-anilinoquinoline derivatives and for modulating DNA methylation are provided. Also provided are methods for formulating and administering these compounds or compositions to treat conditions such as cancer and hematological disorders.
    Type: Application
    Filed: April 10, 2009
    Publication date: November 19, 2009
    Applicant: SuperGen, Inc.
    Inventors: Pasit Phiasivongsa, Sanjeev G. Redkar, Swarna Gamage, Darby Brooke, William Denny, David J. Bearss, Hariprasad Vankayalapati, Yong Xu, Krzysztof Swierczek
  • Publication number: 20090105156
    Abstract: The invention relates to crystalline peptide keto epoxide compounds, methods of their preparation, and related pharmaceutical compositions. This invention also relates to methods for the preparation of amino acid keto-epoxides. Specifically, allylic ketones are stereoselectively converted to the desired keto epoxides.
    Type: Application
    Filed: October 3, 2008
    Publication date: April 23, 2009
    Applicant: Proteolix, Inc.
    Inventors: Pasit Phiasivongsa, Louis C. Sehl, William Dean Fuller, Guy J. Laidig
  • Publication number: 20090099106
    Abstract: Quinoline derivatives, particularly 4-anilinoquinoline derivatives, are provided. Such quinoline derivatives can be used for modulation of DNA methylation, such as effective inhibition of methylation of cytosine at the C-5 position, for example via selective inhibition of DNA methyltransferase DNMT1. Methods for synthesizing numerous 4-anilinoquinoline derivatives and for modulating DNA methylation are provided. Also provided are methods for formulating and administering these compounds or compositions to treat conditions such as cancer and hematological disorders.
    Type: Application
    Filed: December 18, 2007
    Publication date: April 16, 2009
    Applicant: SUPERGEN, INC.
    Inventors: Pasit Phiasivongsa, Sanjeev G. Redkar, Swarna Gamage, Darby Brooke, William Denny, David J. Bearss, Hariprasad Vankayalapati
  • Publication number: 20080226747
    Abstract: The present invention relates to pharmaceutical formulations comprising the protein kinase inhibitor, MP470, and methods of using same in treating conditions involving undesirable cell proliferation, such as cancer.
    Type: Application
    Filed: March 3, 2008
    Publication date: September 18, 2008
    Applicant: SUPERGEN, INC.
    Inventors: David J. Bearss, Rajashree Joshi-Hangal, Xiao-Hui Liu, Pasit Phiasivongsa, Sanjeev G. Redkar, Hariprasad Vankayalapati
  • Publication number: 20080175814
    Abstract: Quinoline derivatives, particularly 4-anilinoquinoline derivatives, are provided. Such quinoline derivatives can be used for modulation of DNA methylation, such as effective inhibition of methylation of cytosine at the C-5 position, for example via selective inhibition of DNA methyltransferase DNMT1. Methods for synthesizing numerous 4-anilinoquinoline derivatives and for modulating DNA methylation are provided. Also provided are methods for formulating and administering these compounds or compositions to treat conditions such as cancer and hematological disorders.
    Type: Application
    Filed: October 12, 2007
    Publication date: July 24, 2008
    Applicant: SUPERGEN, INC.
    Inventors: Pasit Phiasivongsa, Sanjeev Redkar, Swarna Gamage, Darby Brooke, William Denny, David J. Bearss, Hariprasad Vankayalapati
  • Patent number: 7250416
    Abstract: Compounds and compositions of azacytosine analogs and derivatives are provided. In one aspect of the invention, analogs or derivatives of decitabine and azacitidine are provided with modification at the 4- and 6-position of the triazine ring, at the 1?–6? position of the ribose ring, or combinations thereof. Methods of synthesizing and manufacturing these analogs and derivatives are also provided. These compounds can be formulated into pharmaceutical compositions that can be used for treating any disease that is sensitive to the treatment with decitabine or azacitidine, such as hematological disorders and cancer.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: July 31, 2007
    Assignee: SuperGen, Inc.
    Inventors: Pasit Phiasivongsa, Sanjeev Redkar
  • Publication number: 20070072796
    Abstract: Oligonucleotide analogues are provided that incorporate 5-aza-cytosine in the oligonucleotide sequence, e.g., in the form of 5-aza-2?-deoxycytidine (decitabine) or 5-aza-cytidine. In particular, oligonucleotide analogues rich in decitabine-deoxyguanosine islets (DpG and GpD) are provided to target the CpG islets in the human genome, especially in the promoter regions of genes susceptible to aberrant hypermethylation. Such analogues can be used for modulation of DNA methylation, such as effective inhibition of methylation of cytosine at the C-5 position. Methods for synthesizing these oligonucleotide analogues and for modulating nucleic acid methylation are provided. Also provided are phosphoramidite building blocks for synthesizing the oligonucleotide analogues, methods for synthesizing, formulating and administering these compounds or compositions to treat conditions, such as cancer and hematological disorders.
    Type: Application
    Filed: September 29, 2005
    Publication date: March 29, 2007
    Inventors: Pasit Phiasivongsa, Sanjeev Redkar
  • Publication number: 20060205685
    Abstract: Compounds and compositions of azacytosine analogs and derivatives are provided. In one aspect of the invention, analogs or derivatives of decitabine and azacitidine are provided with modification at the 4- and 6-position of the triazine ring, at the 1?-6?position of the ribose ring, or combinations thereof. Methods of synthesizing and manufacturing these analogs and derivatives are also provided. These compounds can be formulated into pharmaceutical compositions that can be used for treating any disease that is sensitive to the treatment with decitabine or azacitidine, such as hematological disorders and cancer.
    Type: Application
    Filed: March 11, 2005
    Publication date: September 14, 2006
    Inventors: Pasit Phiasivongsa, Sanjeev Redkar
  • Publication number: 20060205687
    Abstract: Compounds and compositions of azacytosine analogs and derivatives are provided. In one aspect of the invention, analogs or derivatives of decitabine and azacitidine are provided with modification at the 2-, 4-, or 6-position of the triazine ring, at the 1?-6?position of the ribose ring, or combinations thereof. Methods of using, synthesizing and manufacturing these analogs and derivatives are also provided. These compounds can be formulated into pharmaceutical compositions that can be used for treating any disease associated with aberrant DNA methylation, or a disease or condition that is sensitive to the treatment with decitabine or azacitidine, such as hematological disorders, tumors and cancers.
    Type: Application
    Filed: March 10, 2006
    Publication date: September 14, 2006
    Inventors: Pasit Phiasivongsa, Sanjeev Redkar
  • Publication number: 20060074046
    Abstract: The present invention relates to salts of decitabine as well as methods for synthesizing the salts described herein. Pharmaceutical compositions and methods of using the decitabine salts are also provided, including methods of orally administering the salts or pharmaceutical compositions thereof to treat conditions, such as cancer and hematological disorders.
    Type: Application
    Filed: September 27, 2005
    Publication date: April 6, 2006
    Inventors: Sanjeev Redkar, Pasit Phiasivongsa
  • Publication number: 20060069060
    Abstract: The present invention relates to salts of decitabine as well as methods for synthesizing the salts described herein. Pharmaceutical compositions and methods of using the decitabine salts are also provided, including methods of administering the salts or pharmaceutical compositions thereof to treat conditions, such as cancer and hematological disorders.
    Type: Application
    Filed: September 27, 2004
    Publication date: March 30, 2006
    Inventors: Sanjeev Redkar, Pasit Phiasivongsa
  • Publication number: 20060063735
    Abstract: The present invention relates to salts of 5-azacytidine as well as methods for synthesizing the salts described herein. Pharmaceutical compositions and methods of using the 5-azacytidine salts are also provided, including methods of administering the salts or pharmaceutical compositions thereof to treat conditions, such as cancer and hematological disorders.
    Type: Application
    Filed: September 17, 2004
    Publication date: March 23, 2006
    Applicant: SuperGen, Inc.
    Inventors: Sanjeev Redkar, Pasit Phiasivongsa
  • Publication number: 20050267056
    Abstract: Methods and compositions are provided for efficiently preparing and manufacturing pentostatin. Also provided are novel precursors of pentostatin, pentostatin analogs and derivatives. In one aspect of the invention, a method is provided for total chemical synthesis of pentostatin via a route of heterocyclic ring expansion. For example, a heterocyclic pharmaceutical intermediate for drugs such as pentostatin, e.g., the diazepinone precursor, can be obtained efficiently through a ring expansion of an O—C—N functionality in a hypoxanthine or 2?-deoxyinosine derivative. The methods and compositions can also be used to synthesize and manufacture heterocyclic compounds other than pentostatin, especially pharmaceutically important heterocyclic compounds.
    Type: Application
    Filed: September 15, 2004
    Publication date: December 1, 2005
    Inventors: Pasit Phiasivongsa, Sanjeev Redkar