Patents by Inventor Chandrashekar Aswathanarayanappa

Chandrashekar Aswathanarayanappa 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: 20180339964
    Abstract: The present invention provides an industrial method for production of silodosin, which is useful for a therapeutic agent for dysuria associated with benign prostatic hyperplasia. The production of silodosin is characterized by mixing (R)-1-(3-hydroxypropyl)-5-(2-(2-(2-(2, 2, 2-trifluoroethoxy) phenoxy) ethyl amino) propyl) indoline-7-carbonitrile (V) and N-acetyl-L-glutamic acid to yield the N-acetyl-L-glutamate salt, subsequently neutralising the N-acetyl-L-glutamate salt and hydrolyzing the same, and manufacturing intermediates used therefore. The invention also provides an industrial production method of silodosin alpha, beta and gamma crystalline forms.
    Type: Application
    Filed: September 21, 2016
    Publication date: November 29, 2018
    Inventors: Chandrashekar ASWATHANARAYANAPPA, Thilak Gregory SOUNDARARAJAN, Nooka Appa Rao GORLI V, Surendra Babu JAGABATHUNI, Palle Venkata Raghavendra CHARYULU
  • Patent number: 9815772
    Abstract: The present disclosure relates to processes for the preparation of 2-amino-1,3-propane diol compounds and their hydrochloride salts. Particularly, the present disclosure relates to processes for synthesizing 2-amino-2-(2-(4-octylphenyl)ethyl)-1,3-propanediol and its hydrochloride salt 2-amino-2-(2-(4-octylphenyl)ethyl)-1,3-propanediol hydrochloride respectively. The said process is safe, commercially feasible for large-scale synthesis and has improved efficacy along with many other advantages. The present disclosure also relates to the novel polymorphs of 2-amino-1,3-propane diol compound and its hydrochloride salt, where in 2-amino-1,3-propane diol compound is 2-amino-2-(2-(4-octylphenyl)ethyl)-1,3-propanediol, and its hydrochloride salt is 2-amino-2-(2-(4-octylphenyl)ethyl)-1,3-propanediol hydrochloride.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: November 14, 2017
    Assignee: Biocon Limited
    Inventors: Kothakonda Kiran Kumar, Chandrashekar Aswathanarayanappa, Dharshan Jakkali Chandregowda, Chandrasekhar Duvva, Venkata Srinivas Pullela
  • Publication number: 20160009634
    Abstract: The present disclosure relates to processes for the preparation of 2-amino-1,3-propane diol compounds and their hydrochloride salts. Particularly, the present disclosure relates to processes for synthesizing 2-amino-2-(2-(4-octylphenyl)ethyl)-1,3-propanediol and its hydrochloride salt 2-amino-2-(2-(4-octylphenyl)ethyl)-1,3-propanediol hydrochloride respectively. The said process is safe, commercially feasible for large-scale synthesis and has improved efficacy along with many other advantages. The present disclosure also relates to the novel polymorphs of 2-amino-1,3-propane diol compound and its hydrochloride salt, where in 2-amino-1,3-propane diol compound is 2-amino-2-(2-(4-octylphenyl)ethyl)-1,3-propanediol, and its hydrochloride salt is 2-amino-2-(2-(4-octylphenyl)ethyl)-1,3-propanediol hydrochloride.
    Type: Application
    Filed: March 4, 2014
    Publication date: January 14, 2016
    Inventors: Kothakonda Kiran Kumar, Chandrashekar Aswathanarayanappa, Dharshan Jakkali Chandregowda, Chandrasekhar Duvva, Venkata Srinivas Pullela
  • Patent number: 9040723
    Abstract: The present invention relates to methods of synthesizing oligomeric compounds, and more particularly, to methods of synthesizing oligomer compounds comprising polyethylene glycol moieties. The present invention provides improved methods for synthesizing oligomers comprising polyethylene glycol moieties. Methods according to embodiments of the present invention may utilize reaction conditions that are milder, efficacious than those taught by conventional methods.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: May 26, 2015
    Assignee: BIOCON LIMITED
    Inventors: Reena Vijayaraghavan, Srinivas Pullela Venkata, Chandrashekar Aswathanarayanappa
  • Publication number: 20120209011
    Abstract: This invention relates to novel process for the preparation of prostaglandin compounds having formula (K), wherein R is selected from the group consisting of C1-C7 alkyl; C7-C17 aralkyl wherein the aryl group is unsubstituted or substituted with one to three substituents selected from the group consisting of C1-C6 alkyl, halo and CF3; and (CH2)nOR2 wherein n is from 1 to 3 and R2 represents a C6-C10 aryl group which is unsubstituted or substituted with one to three substituents selected from the group consisting of C1-C6 alkyl, halo and CF3; and R1 is selected from OR3 and NHR3 wherein R3 is C1-C6 alkyl, H; and dashed lines represents a double bond or a single bond, is disclosed. Novel intermediates are also disclosed.
    Type: Application
    Filed: December 21, 2009
    Publication date: August 16, 2012
    Inventors: Chandrashekar Aswathanarayanappa, Pullela Venkata Srinivas, Divya Kangath, Thilak Gregory Soundararajan, Anegondi Sreenivasa Prasad, Suriyan Masinaickenpatty Raghavendran
  • Publication number: 20120022274
    Abstract: The present disclosure provides a crystalline form of orlistat, particularly form A of orlistat. The characterization of said form is performed using X-ray diffraction studies, IR and Differential Scanning calorimetry melting endotherm studies. Also, the disclosure provides a simple process to arrive at said crystalline form.
    Type: Application
    Filed: March 6, 2009
    Publication date: January 26, 2012
    Inventors: Umesh Sannachikkanna, Chandrashekar Aswathanarayanappa, Pullela Venkata Srinivas
  • Publication number: 20110118480
    Abstract: The present invention relates to methods of synthesizing oligomeric compounds, and more particularly, to methods of synthesizing oligomer compounds comprising polyethylene glycol moieties. The present invention provides improved methods for synthesizing oligomers comprising polyethylene glycol moieties. Methods according to embodiments of the present invention may utilize reaction conditions that are milder, efficacious than those taught by conventional methods.
    Type: Application
    Filed: August 28, 2008
    Publication date: May 19, 2011
    Applicant: BIOCON LIMITED
    Inventors: Reena Vijayaraghavan, Srinivas Pullela Venkata, Chandrashekar Aswathanarayanappa
  • Publication number: 20100168201
    Abstract: Crystalline and amorphous polymorphic forms of Atorvastatin magnesium and processes for their preparation are claimed.
    Type: Application
    Filed: November 29, 2005
    Publication date: July 1, 2010
    Applicant: BIOCAN LIMITED
    Inventors: Joy Mathew, Chandrashekar Aswathanarayanappa, Tom Thomas Puthiaparampil
  • Patent number: 7232920
    Abstract: In one aspect, the invention provides a process for the preparation of compounds of Formula I wherein R1 is —CN, —OP, alkyl, aryl or heteroaryl; wherein P represents any suitable protecting group; and R2 is alkyl or aryl; by reacting a compound of Formula II wherein R1 is —CN, —OP, alkyl, aryl or heteroaryl; wherein P represents any suitable protecting group; and R2 is alkyl or aryl; with a reducing agent (e.g. sodium borohydride) in the presence of a metal halid (e.g. CeCl3) or a metal alkoxid (e.g. Ti(OiPr)4).
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: June 19, 2007
    Assignee: Biocon
    Inventors: Tom Thomas Puthiaparampil, Acharya Poornaprajna, Chandrashekar Aswathanarayanappa, Madhavan Sridharan, Sambasivam Ganesh
  • Publication number: 20040259946
    Abstract: In one aspect, the invention provides a process for the preparation of compounds of Formula I 1
    Type: Application
    Filed: August 12, 2004
    Publication date: December 23, 2004
    Inventors: Tom Thomas Puthiaparampil, Acharya Poornaprajna, Chandrashekar Aswathanarayanappa, Madhavan Sridharan, Sambasivam Ganesh