Patents by Inventor Panolil Raveendranath

Panolil Raveendranath 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: 7582771
    Abstract: A process for making the compound of formula (I) wherein Ac represents acetate; X represents O or CH2; Y represents C1-C6alkyl; and Z is selected from the group consisting of H, halogen, CN, CHO, CF3, OCF3, OH, C1-C6alkyl, C1-C6alkoxy, C1-C6thioalkyl, NH2, N(C1-C6alkyl)2, NH(C1-C6alkyl), NC(O)—(C1C6alkyl), and NO2. In his process, a compound of formula (II) is reacted with hydrazine to form a primary alkylamine, and then the primary alkylamine is reacted with acetic anhydride, to produce the compound of formula (I).
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: September 1, 2009
    Assignee: Wyeth
    Inventors: Christoph M. Dehnhardt, Sreenivasulu Megati, Ronald S. Michalak, Panolil Raveendranath, Jianxin Ren, Charles C. Wu, Yangzhong Wu
  • Patent number: 7557237
    Abstract: A process for making a compound of formula I and intermediate compounds thereof, wherein R1 is CN, F or Cl; R2 is H or Br; and R3 and R4 are each independently H or F. The compounds of formula I are useful in the treatment of chronic inflammatory diseases, such as rheumatoid arthritis.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: July 7, 2009
    Assignee: Wyeth
    Inventors: Yanzhong Wu, Jianxin Ren, Mousumi Ghosh, Mahmut Levent, Karen W. Sutherland, Panolil Raveendranath
  • Publication number: 20090023925
    Abstract: The present invention provides N?-(2-halobenzylidene)sulfonylhydrazides of formula I Compounds of formula I are useful for the manufacture of 1-arylsulfonylindazole 5-HT6 ligands.
    Type: Application
    Filed: June 27, 2008
    Publication date: January 22, 2009
    Applicant: Wyeth
    Inventors: Anita Wai-Yin Chan, Mahmut Levent, David Place, Panolil Raveendranath, Sanjay Raveendranth, Vijay Raveendranath, Girija Raveendranath, Xinxu Shi, Charles Wu
  • Publication number: 20090012308
    Abstract: The present invention provides a process for the manufacture of an arylmethyl-sulfonylarene, R1CH2SO2R2, wherein R1 and R2 are each independently an optionally substituted phenyl or naphthyl group which process comprises reacting an arylmethylhalide, R1CH2-Hal wherein R1 is as defined hereinabove and Hal is Cl, Br or I with a sodium arylsulfinate R2SO2Na wherein R2 is as defined hereinabove in the presence of a base optionally in the presence of a solvent. Also provided is the use of the inventive process in the manufacture of a 3-arylsulfonylindazole 5-HT6 ligand.
    Type: Application
    Filed: June 9, 2008
    Publication date: January 8, 2009
    Applicant: Wyeth
    Inventors: Mahmut Levent, Panolil Raveendranath, Sanjay Raveendranath, Vijay Raveendranath, Girija Raveendranath
  • Publication number: 20080194533
    Abstract: The present invention relates to processes for selective sulfation of an aromatic hydroxyl group over an aliphatic hydroxyl group where both are present in the same molecule. This invention also relates to processes for selective sulfation of the aromatic hydroxyl group of equilin, equilenin, estradiol, estra(1,3,5-triene)-3,16,17-triol, dihydroequilenin or dihydroequilin. This invention further relates to alkali metal salts of dihydroequilenin sulfates, dihydroequilin sulfates, estradiol sulfates, and estriol sulfates, processes for making thereof, stable compositions comprising thereof, and the use thereof.
    Type: Application
    Filed: February 7, 2008
    Publication date: August 14, 2008
    Applicant: WYETH
    Inventors: Sreenivasulu MEGATI, Panolil RAVEENDRANATH, Girija Raveendranath, Vijay Raveendranath, Sanjay Raveendranath
  • Publication number: 20080188545
    Abstract: Provided are methods for the preparation of certain substituted pyrrolidine compounds, forms of (2S,4R)-1-(2-aminoacetyl)-4-benzamidopyrrolidine-2-carboxylic acid hydrochloride, and methods for preparing and using these forms.
    Type: Application
    Filed: December 20, 2007
    Publication date: August 7, 2008
    Inventors: Asaf R. Alimardanov, Lalitha Krishnan, Maotang Zhou, Ting-Zhong Wang, Jianxin Ren, John Leo Considine, Charles C. Wu, Jason Brazzillo, Panolil Raveendranath, Girija Raveendranath, Vijay Raveendranath, Sanjay Raveeendranath, Karen Sutherland, Mahmoud Mirmehrabi, Subodh S. Deshmukh
  • Publication number: 20080177085
    Abstract: A process for making a substituted indole compound, including the steps of: reacting the compounds in a non-protic polar solvent in the presence of a catalyst to form the intermediate compound wherein Ph and X are as defined herein; and then, heating this intermediate compound in the solvent in the presence of the catalyst to form the substituted indole compound The invention also includes compounds formed by this process.
    Type: Application
    Filed: March 4, 2008
    Publication date: July 24, 2008
    Inventors: Christoph M. Dehnhardt, Sreenivasulu Megati, Ronald S. Michalak, Panolil Raveendranath
  • Publication number: 20080161581
    Abstract: A process for the reductive alkylation at the C-3 position of an indole compound in which the indole is treated with an aldehyde in the presence of a Lewis acid and a silicon hydride reducing agent. The process is useful for alkylating the C-3 position of indoles that contain acid-sensitive substituents at the N-1 position.
    Type: Application
    Filed: October 15, 2007
    Publication date: July 3, 2008
    Inventors: Ronald S. Michalak, Panolil Raveendranath
  • Publication number: 20080146645
    Abstract: Processes are disclosed for preparing indolinone phenylaminopropanol derivatives, particularly chiral indolinone phenylaminopropanol derivatives of the general formula: The processes disclosed may be used to prepare, inter alia, 7-fluoro-1-[(1S, 2R)-1-(3-fluorophenyl)-2-hydroxy-3-(methylamino)propyl]-3,3-dimethyl-1,3-dihydro-2H-indol-2-one and 7-fluoro-1-[(1S, 2R)-1-(3,5-difluorophenyl)-2-hydroxy-3-(methylamino)propyl]-3,3-dimethyl-1,3-dihydro-2H-indol-2-one. Intermediates of the processes are also disclosed.
    Type: Application
    Filed: August 22, 2007
    Publication date: June 19, 2008
    Applicant: Wyeth
    Inventors: Anita Wai-Yin Chan, Zhixian Ding, Mousumi Ghosh, Mahmut Levent, Panolil Raveendranath, Jianxin Ren, Maotang Zhou, Asaf Alimardanov, Alexander V. Gontcharov, Antonia A. Nikitenko, John R. Potoski, Girija Raveendranath, Vijay Raveendranath, Sanjay Raveendranath
  • Patent number: 7342119
    Abstract: A process for making a substituted indole compound, including the steps of: reacting the compounds in a non-protic polar solvent in the presence of a catalyst to form the intermediate compound wherein Ph and X are as defined herein; and then, heating this intermediate compound in the solvent in the presence of the catalyst to form the substituted indole compound The invention also includes compounds formed by this process.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: March 11, 2008
    Inventors: Christoph M. Dehnhardt, Sreenivasulu Megati, Ronald S. Michalak, Panolil Raveendranath
  • Publication number: 20080039639
    Abstract: Methods of preparing compounds of formula I or pharmaceutically acceptable salts thereof are provided: wherein each of R1, R2, R3, R4, x, m, n, and Ar are as defined, and described in classes and subclasses herein, which are agonists or partial agonists of the 2C subtype of brain serotonin receptors. The compounds, and compositions containing the compounds, can be used to treat a variety of central nervous system disorders such as schizophrenia.
    Type: Application
    Filed: April 18, 2007
    Publication date: February 14, 2008
    Applicant: Wyeth
    Inventors: Alexander Gontcharov, Antonia Nikitenko, Panolil Raveendranath, Chia-Cheng Shaw, Bogdan Wilk, Dahui Zhou
  • Publication number: 20070265335
    Abstract: Substantially pure polymorphic forms of 5-cyclopropyl-2-(4-fluorophenyl)-6-[(2-hydroxyethyl)(methylsulfonyl)amino]-N-methyl-1-benzofuran-3-carboxamide are produced by recrystallization in an organic solvent.
    Type: Application
    Filed: November 9, 2006
    Publication date: November 15, 2007
    Applicants: WYETH, VIROPHARMA INCORPORATED
    Inventors: WEIGUO LIU, QIUXIA WANG, WEI TONG, PANOLIL RAVEENDRANATH, SILVIO IERA
  • Publication number: 20070249869
    Abstract: A method of selectively preparing a chiral 2S-amino alcohol useful in preparation of an amide sulfonated or acylated with alkyl, substituted aryl or substituted heteroaryl is described. The method involves reacting a di-tert-butyl diazene-1,2-dicarboxylate with a (4S)-4-benzyl-3-[(S)-trifluoromethyl-alkyl substituted alkanoyl]-1,3-oxazolidin-2-one to afford a di-tert-butyl 1-(1S,2S)-([(4S)-4-benzyl-2-oxo-1,3-oxazolidine-3-yl]-carbonyl}-trifluoromethyl-alkyl substituted alkyl)hydrazine-1,2-dicarboxylate. This dicarboxylate is then reduced to yield di-tert-butyl 1-(1S,2S)-[trifluoromethyl-alkyl substituted alkyl]hydrazine-1-(hydroxymethyl)-1,2-dicarboxylate. The resulting product is deblocked with an acid to yield the acid addition salt of (2S,3S)-trifluoro-hydrazino-methyl alkan-1-ol. The acid addition salt of (2S,3S)-trifluor-2-hydrazino-methyl alkan-1-ol is hydrogenated in the presence of a suitable metal catalyst to yield the amino alcohol (2S,3S)-2-amino-trifluoro-methyl alkan-1-ol HCl.
    Type: Application
    Filed: April 18, 2007
    Publication date: October 25, 2007
    Applicant: Wyeth
    Inventors: John Sellstedt, Gloria Cheal, Razzak Noureldin, Anita Wai-Yin Chan, Panolil Raveendranath, Thomas Joseph Caggiano
  • Patent number: 7282594
    Abstract: A process for the reductive alkylation at the C-3 position of an indole compound in which the indole is treated with an aldehyde in the presence of a Lewis acid and a silicon hydride reducing agent. The process is useful for alkylating the C-3 position of indoles that contain acid-sensitive substituents at the N-1 position.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: October 16, 2007
    Assignee: Wyeth
    Inventors: Ronald S. Michalak, Panolil Raveendranath
  • Publication number: 20070213526
    Abstract: Processes are provided for purifying a compound of the structure: wherein, A, B, T, Q and R1 are defined herein, and wherein the process includes dissolving the compound of formula I in a solution containing acetone, water and a base at about 30° C.; filtering the solution containing the compound of formula I at about 30° C.; and precipitating the purified compound of formula I by adjusting the filtered solution to an acidic pH. Desirably, the compound of formula I is 5-(2-thioxospiro[cyclohexane-1,3-[3H]indol]-5-yl)-1-methylpyrrole-2-carbonitrile or tanaproget.
    Type: Application
    Filed: March 5, 2007
    Publication date: September 13, 2007
    Applicant: Wyeth
    Inventors: Mahmut Levent, Panolil Raveendranath, Bogdan Wilk, Donald Carl Boop, Marinus Cornelis Hofman
  • Publication number: 20070197830
    Abstract: Processes for preparing amino alcohols or salts thereof and sulfonamide substituted alcohol compounds are provided. Desirably, the sulfonamide substituted alcohol compounds are heterocyclic sulfonamide trifluoroalkyl-substituted alcohol compounds or phenyl sulfonamide trifluoroalkyl-substituted alcohol compounds.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 23, 2007
    Applicant: Wyeth
    Inventors: Anita Wai-Yin Chan, Jianxin Ren, Mousumi Ghosh, Arkadiy Rubezhov, Panolil Raveendranath, Joseph Zeldis
  • Publication number: 20070197800
    Abstract: Processes for preparing sulfonamide trifluoroalkyl substituted alcohol compounds are provided. Desirably, the compounds are heterocyclic sulfonamide trifluoroalkyl substituted alcohol compounds or phenyl sulfonamide trifluoroalkyl substituted alcohol compounds.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 23, 2007
    Applicant: Wyeth
    Inventors: Anita Wai-Yin Chan, Jianxin Ren, Mousumi Ghosh, Panolil Raveendranath
  • Patent number: 7253291
    Abstract: The present invention describes a process for preparing N-substituted phthalimides of Formula I which are widely useful as intermediates in the preparation of organic compounds such as pharmaceuticals
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: August 7, 2007
    Assignee: Wyeth
    Inventors: Yanzhong Wu, Panolil Raveendranath
  • Patent number: 7202256
    Abstract: Methods for the synthesis of CCI-779 and proline-CCI-779 are described, including a method involving lipase-catalyzed acetylation of 42-hydroxy of rapamycin with a vinyl ester of 2,2-bis(hydroxymethyl) propionic acid in an organic solvent followed by deprotection. Also provided are products containing proline-CCI-779 and uses thereof.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: April 10, 2007
    Assignee: Wyeth
    Inventors: Jianxin Gu, Mark E. Ruppen, Panolil Raveendranath, Warren Chew, Chia-Cheng Shaw
  • Publication number: 20070027327
    Abstract: Processes for preparing oxindoles, which can be utilized in the preparation of a variety of useful compounds, and methods for minimizing or preventing N-alkylation of amide containing compounds, including oxindoles, are provided.
    Type: Application
    Filed: July 27, 2006
    Publication date: February 1, 2007
    Applicant: Wyeth
    Inventors: Yanzhong Wu, Bogdan Wilk, Zhixian Ding, Xinxu Shi, Charles Wu, Panolil Raveendranath, Haris Durutlic