Patents by Inventor Palle Venkata Raghavendra CHARYULU

Palle Venkata Raghavendra CHARYULU 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: 11629120
    Abstract: The present invention provides for methyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt, a novel process for the preparation of crystalline Form B of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenylmethyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: April 18, 2023
    Assignee: BIOCON LIMITED
    Inventors: Palle Venkata Raghavendra Charyulu, Pratik Rameshchandra Patel, Thirunelimada Devaiah Venu, Reddy Avathu Vidyasagar, Rajmahendra Shanmughasamy
  • Patent number: 11066439
    Abstract: The present invention relates to the efficient solid-phase synthesis of liraglutide represented by Formula-I. The present invention relates to an efficient process for the preparation of liraglutide by sequential coupling employing solid phase approach. It involves sequential coupling of protected amino acids to prepare backbone of liraglutide and upon completion of linear sequence, synthesis was extended from lysine side chain by adding ?-glutamic acid and palmitic acid, followed by removal of protective groups, cleavage of the peptide from solid support and purification of crude liraglutide obtained. The present invention also involves the usage of inorganic salts during the coupling, wash with HOBt in DMF solution after Fmoc-deprotection step to suppress the aggregation of peptides and ensure reactions are going for completion, and thus avoid deletion sequences and improve the process yield.
    Type: Grant
    Filed: December 9, 2017
    Date of Patent: July 20, 2021
    Assignee: Biocon Limited
    Inventors: Ramu Vasanthakumar Ganga, Nitin Patil, Palle Venkata Raghavendra Charyulu, Castelino Roopa Jasmine, Rambabu Machani, Deepa Shankar Suvarna
  • Patent number: 10995060
    Abstract: The present invention provides for crystalline Form B1 of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenyl-methyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt, crystalline Form B2 of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenylmethyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt, a novel process for the preparation of crystalline Form B of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenylmethyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt.
    Type: Grant
    Filed: October 28, 2017
    Date of Patent: May 4, 2021
    Assignee: BIOCON LIMITED
    Inventors: Palle Venkata Raghavendra Charyulu, Pratik Rameshchandra Patel, Thirunelimada Devaiah Venu, Reddy Avathu Vidyasagar, Rajmahendra Shanmughasamy
  • Publication number: 20210122708
    Abstract: The present invention provides for crystalline Form B1 of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenyl-methyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt, crystalline Form B2 of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenylmethyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt, a novel process for the preparation of crystalline Form B of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenylmethyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt. The present invention also provides for crystalline Form B of (S)—N-(1-Carboxy-2-Methyl-Prop-1-yl)-N-Pentanoyl-N-[2?-(1H-Tetrazol-5-yl)-Biphenyl-4-yl-Methyl]-Amine disodium salt, crystalline Form P of (S)—N-(1-Carboxy-2-Methyl-Prop-1-yl)-N-Pentanoyl-N-[2?-(1H-Tetrazol-5-yl)-Biphenyl-4-yl-Methyl]-Amine disodium salt and processes for their preparation thereof. The present invention further provides an industrial method production of Amorphous Form of Sacubitril valsartan trisodium.
    Type: Application
    Filed: November 5, 2020
    Publication date: April 29, 2021
    Inventors: PALLE VENKATA RAGHAVENDRA CHARYULU, PRATIK RAMESHCHANDR PATEL, THIRUNELIMADA DEVAIAH VENU, REDDY AVATHU VIDYASAGAR, RAJMAHENDRA SHANMUGHASAMY
  • Patent number: 10927102
    Abstract: The present invention provides an industrial method production of amorphous posaconazole. The present invention also relates to a method for production of the posaconazole via and novel crystalline forms of posaconazole intermediate. More particularly the present invention relates to novel crystalline forms of posaconazole intermediate and methods for production of novel crystalline forms of posaconazole intermediate represented by the following structural formula III Which is key intermediate in the production of posaconazole. The present invention also provides for the one pot process for the preparation of amorphous posaconazole using novel crystalline forms of benzyl posaconazole.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: February 23, 2021
    Assignee: BIOCON LIMITED
    Inventors: Palle Venkata Raghavendra Charyulu, Dharshan Jakkali Chandre Gowda, Shanmughasamy Rajmahendra, Manikandan Raman
  • Publication number: 20200087289
    Abstract: The present invention provides an industrial method production of amorphous posaconazole. The present invention also relates to a method for production of the posaconazole via and novel crystalline forms of posaconazole intermediate. More particularly the present invention relates to novel crystalline forms of posaconazole intermediate and methods for production of novel crystalline forms of posaconazole intermediate represented by the following structural formula III Which is key intermediate in the production of posaconazole. The present invention also provides for the one pot process for the preparation of amorphous posaconazole using novel crystalline forms of benzyl posaconazole.
    Type: Application
    Filed: October 17, 2019
    Publication date: March 19, 2020
    Inventors: Palle Venkata Raghavendra CHARYULU, Dharshan Jakkali Chandre GOWDA, Shanmughasamy RAJMAHENDRA, Manikandan RAMAN
  • Publication number: 20200079817
    Abstract: The present invention relates to the efficient solid-phase synthesis of liraglutide represented by Formula-I. The present invention relates to an efficient process for the preparation of liraglutide by sequential coupling employing solid phase approach. It involves sequential coupling of protected amino acids to prepare backbone of liraglutide and upon completion of linear sequence, synthesis was extended from lysine side chain by adding ?-glutamic acid and palmitic acid, followed by removal of protective groups, cleavage of the peptide from solid support and purification of crude liraglutide obtained. The present invention also involves the usage of inorganic salts during the coupling, wash with HOBt in DMF solution after Fmoc-deprotection step to suppress the aggregation of peptides and ensure reactions are going for completion, and thus avoid deletion sequences and improve the process yield.
    Type: Application
    Filed: December 9, 2017
    Publication date: March 12, 2020
    Inventors: Ramu Vasanthakumar GANGA, Nitin PATIL, Palle Venkata Raghavendra CHARYULU, Castelino Roopa JASMINE, Rambabu MACHANI, Deepa Shankar SUVARNA
  • Patent number: 10457668
    Abstract: The present invention provides an industrial method production of amorphous posaconazole. The present invention also relates to a method for production of the posaconazole via and novel crystalline forms of posaconazole intermediate. More particularly the present invention relates to novel crystalline forms of posaconazole intermediate and methods for production of novel crystalline forms of posaconazole intermediate represented by the following structural formula III Which is key intermediate in the production of posaconazole. The present invention also provides for the one pot process for the preparation of amorphous posaconazole using novel crystalline forms of benzyl posaconazole.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: October 29, 2019
    Assignee: BIOCON LIMITED
    Inventors: Palle Venkata Raghavendra Charyulu, Dharshan Jakkali Chandre Gowda, Shanmughasamy Rajmahendra, Manikandan Raman
  • Publication number: 20190322615
    Abstract: The present invention provides for crystalline Form B1 of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenyl-methyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt, crystalline Form B2 of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenylmethyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt, a novel process for the preparation of crystalline Form B of N-(3-carboxyl-1-oxopropyl)-(4S)-(p-phenylphenylmethyl)-4-amino-2R-methyl butanoic acid ethyl ester sodium salt. The present invention also provides for crystalline Form B of (S)—N-(1-Carboxy-2-Methyl-Prop-1-yl)-N-Pentanoyl-N-[2?-(1H-Tetrazol-5-yl)-Biphenyl-4-yl-Methyl]-Amine disodium salt, crystalline Form P of (S)—N-(1-Carboxy-2-Methyl-Prop-1-yl)-N-Pentanoyl-N-[2?-(1H-Tetrazol-5-yl)-Biphenyl-4-yl-Methyl]-Amine disodium salt and processes for their preparation thereof. The present invention further provides an industrial method production of Amorphous Form of Sacubitril valsartan trisodium.
    Type: Application
    Filed: October 28, 2017
    Publication date: October 24, 2019
    Inventors: PALLE VENKATA RAGHAVENDRA CHARYULU, PRATIK RAMESHCHANDRA PATEL, THIRUNELIMADA DEVAIAH VENU, REDDY AVATHU VIDYASAGAR, RAJMAHENDRA SHANMUGHASAMY
  • 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
  • Publication number: 20180319777
    Abstract: The present invention provides an industrial method production of amorphous posaconazole. The present invention also relates to a method for production of the posaconazole via and novel crystalline forms of posaconazole intermediate. More particularly the present invention relates to novel crystalline forms of posaconazole intermediate and methods for production of novel crystalline forms of posaconazole intermediate represented by the following structural formula III Which is key intermediate in the production of posaconazole. The present invention also provides for the one pot process for the preparation of amorphous posaconazole using novel crystalline forms of benzyl posaconazole.
    Type: Application
    Filed: September 22, 2016
    Publication date: November 8, 2018
    Inventors: Palle Venkata Raghavendra CHARYULU, Dharshan Jakkali Chandre GOWDA, Shanmughasamy RAJMAHENDRA, Manikandan RAMAN