Patents by Inventor Saswata Lahiri

Saswata Lahiri 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: 20230295077
    Abstract: The present invention relates to an improved process for the preparation of a compound of Formula (1), The invention also provides improved processes for the preparation of intermediates used in the synthesis of Formula (1). The compound of Formula (1) is used in the synthesis of Semaglutide.
    Type: Application
    Filed: April 9, 2021
    Publication date: September 21, 2023
    Applicant: FRESENIUS KABI ONCOLOGY LIMITED
    Inventors: Maneesh Kumar PANDEY, Sonu Prasad SHUKLA, Sachin NAIN, Sandeep SANDEEP, Sridhar MALE, Sarbjot Singh SOKHI, Govind SINGH, Saswata LAHIRI, Walter CABRI
  • Patent number: 11739057
    Abstract: The present invention relates to the polymorphic forms of Belinostat. The invention also relates to the process for the preparation of the polymorphic forms of Belinostat. This invention further relates to pharmaceutical composition of said polymorphic forms of Belinostat and use thereof in the treatment of a patient in need thereof.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: August 29, 2023
    Assignee: FRESENIUS KABI ONCOLOGY LTD.
    Inventors: Sridhar Reddy Male, Saurabh Upadhyay, Suneel Kumar Sharma, Hrishikesh Acharya, Govind Singh, Saswata Lahiri, Walter Cabri
  • Publication number: 20230174444
    Abstract: The present provides a simple, convenient and time-efficient process for the preparation of propofol. Particularly, the present invention provides an improved process for the preparation of propofol using a heterocyclic base for the decarboxylation reaction. The present invention provides a time-efficient process for the preparation of propofol with high yield and purity.
    Type: Application
    Filed: March 25, 2021
    Publication date: June 8, 2023
    Applicant: FRESENIUS KABI ONCOLOGY LTD.
    Inventors: Ashwani Kumar SHARMA, Manish PANDEY, Abhishek GIRI, Sarbjot Singh SOKHI, Govind SINGH, Saswata LAHIRI, Walter CABRI
  • Patent number: 11667654
    Abstract: The present invention relates to an improved process for the preparation of a compound of formula (I), wherein PG1 may be independently selected from tert-butyloxycarbonyl (Boc), phthaloyl, 9-fluorenylmethyloxycarbonyl (Fmoc), triphenylmethyl (Trityl), carboxybenzyl (Cbz), trifluoroacetyl, benzyl (Bn), benzylidene, methanesulfonyl (Mesyl), toluene sulfonyl (Tosyl) or acyl; its isolation as solid and use for the preparation of the compound of formula (IV), in particular the compound of formula (IV) i.e. [(1R)-3-methyl-1[[(2S)-1-oxo-3-phenyl-2-[(pyrazinylcarbonyl) amino]propyl]amino]butyl] boronic acid with more than 99.95% chiral purity, as measured by HPLC.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: June 6, 2023
    Assignee: Fresenius Kabi Oncology Ltd.
    Inventors: Maneesh Kumar Pandey, Raj Narayan Tiwari, Sonu Shukla, Sarbjot Singh Sokhi, Govind Singh, Saswata Lahiri, Walter Cabri
  • Patent number: 11465999
    Abstract: The present invention relates to a process for preparing the Alectinib or a pharmaceutically acceptable salt thereof using lesser reaction steps and also eliminating expensive and time-consuming column chromatography. The invention also relates to novel polymorphic forms of Alectinib and Alectinib hydrochloride.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: October 11, 2022
    Assignee: FRESENIUS KABI ONCOLOGY LTD.
    Inventors: Vinod Singh Tomar, Abul Azim, Nitin Gupta, Saswata Lahiri, Walter Cabri
  • Patent number: 11440912
    Abstract: The invention relates to a process for the preparation of ribociclib of formula V or its salts. The invention provides novel crystalline forms of ribociclib succinate and ribociclib trifluoroacetate. The present invention also relates to pharmaceutical compositions comprising a crystalline form of ribociclib succinate and at least a pharmaceutically acceptable carrier. It further relates to the use of such compositions in the treatment of cancer.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: September 13, 2022
    Assignee: FRESENIUS KABI ONCOLOGY LTD
    Inventors: Sarbjot Singh Sokhi, Govind Singh, Saswata Lahiri, Maneesh Kumar Pandey, Raj Narayan Tiwari, Sonu Shukla, Sachin Musmade, Heena Dua, Walter Cabri
  • Patent number: 11390612
    Abstract: The present invention relates to crystalline forms of Afatinib and its dimaleate salt. The present invention also relates to processes for the preparation of crystalline forms of Afatinib and its dimaleate salt. The present invention further relates to pharmaceutical compositions of such crystalline forms of Afatinib dimaleate and use thereof in the treatment of a patient in need thereof.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: July 19, 2022
    Assignee: Fresenius Kabi Oncology Ltd.
    Inventors: Walter Cabri, Saswata Lahiri, Bhuwan Bhaskar Mishra, Abul Azim, Nilendu Panda, Poli Reddy Bhavanam, Krishanu Ray, Nikunj Kachhadia, Kumber Singh
  • Publication number: 20210371410
    Abstract: The present invention relates to a process for preparing the Alectinib or a pharmaceutically acceptable salt thereof using lesser reaction steps and also eliminating expensive and time-consuming column chromatography. The invention also relates to novel polymorphic forms of Alectinib and Alectinib hydrochloride.
    Type: Application
    Filed: August 16, 2021
    Publication date: December 2, 2021
    Applicant: FRESENIUS KABI ONCOLOGY LIMITED
    Inventors: Vinod Singh TOMAR, Abul AZIM, Nitin GUPTA, Saswata LAHIRI, Walter CABRI
  • Publication number: 20210292276
    Abstract: The present invention relates to the polymorphic forms of Belinostat. The invention also relates to the process for the preparation of the polymorphic forms of Belinostat. This invention further relates to pharmaceutical composition of said polymorphic forms of Belinostat and use thereof in the treatment of a patient in need thereof.
    Type: Application
    Filed: June 3, 2021
    Publication date: September 23, 2021
    Applicant: FRESENIUS KABI ONCOLOGY LTD.
    Inventors: Sridhar Reddy MALE, Saurabh UPADHYAY, Suneel Kumar SHARMA, Hrishikesh ACHARYA, Govind SINGH, Saswata LAHIRI, Walter CABRI
  • Patent number: 11098037
    Abstract: The present invention relates to a process for preparing the Alectinib or a pharmaceutically acceptable salt thereof using lesser reaction steps and also eliminating expensive and time-consuming column chromatography. The invention also relates to novel polymorphic forms of Alectinib and Alectinib hydrochloride.
    Type: Grant
    Filed: July 4, 2018
    Date of Patent: August 24, 2021
    Assignee: Fresenius Kabi Oncology Ltd.
    Inventors: Vinod Singh Tomar, Abul Azim, Nitin Gupta, Saswata Lahiri, Walter Cabri
  • Patent number: 11078231
    Abstract: The present invention relates to a process for the purification of compound of formula II, wherein X may be independently selected from trifluoroacetic acid, hydrochloric acid, hydrobromic acid, p-toluene sulfonic acid and phosphoric acid; its isolation as solid and use for the preparation of carfilzomib.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: August 3, 2021
    Assignee: FRESENIUS KABI ONCOLOGY LTD
    Inventors: Walter Cabri, Saswata Lahiri, Govind Singh, Sarbjot Singh Sokhi, Maneesh Kumar Pandey, Raj Narayan Tiwari, Sonu Prasad Shukla
  • Patent number: 11059777
    Abstract: The present invention relates to the polymorphic forms of Belinostat. The invention also relates to the process for the preparation of the polymorphic forms of Belinostat. This invention further relates to pharmaceutical composition of said polymorphic forms of Belinostat and use thereof in the treatment of a patient in need thereof.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: July 13, 2021
    Assignee: Fresenius Kabi Oncology Ltd.
    Inventors: Sridhar Reddy Male, Saurabh Upadhyay, Suneel Kumar Sharma, Hrishikesh Acharya, Govind Singh, Saswata Lahiri, Walter Cabri
  • Publication number: 20210024506
    Abstract: The present invention relates to crystalline forms of Afatinib and its dimaleate salt. The present invention also relates to processes for the preparation of crystalline forms of Afatinib and its dimaleate salt. The present invention further relates to pharmaceutical compositions of such crystalline forms of Afatinib dimaleate and use thereof in the treatment of a patient in need thereof.
    Type: Application
    Filed: October 1, 2020
    Publication date: January 28, 2021
    Applicant: FRESENIUS KABI ONCOLOGY LIMITED
    Inventors: Walter CABRI, Saswata LAHIRI, Bhuwan Bhaskar MISHRA, Abul AZIM, Nilendu PANDA, Poli Reddy BHAVANAM, Krishanu RAY, Nikunj KACHHADIA, Kumber SINGH
  • Patent number: 10800763
    Abstract: The present invention relates to crystalline forms of Afatinib and its dimaleate salt. The present invention also relates to processes for the preparation of crystalline forms of Afatinib and its dimaleate salt. The present invention further relates to pharmaceutical compositions of such crystalline forms of Afatinib dimaleate and use thereof in the treatment of a patient in need thereof.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: October 13, 2020
    Assignee: Fresenius Kabi Oncology Ltd.
    Inventors: Walter Cabri, Saswata Lahiri, Bhuwan Bhaskar Mishra, Abul Azim, Nilendu Panda, Poli Reddy Bhavanam, Krishanu Ray, Nikunj Kachhadia, Kumber Singh
  • Publication number: 20200277295
    Abstract: The invention relates to a process for the preparation of ribociclib of formula V or its salts. The invention provides novel crystalline forms of ribociclib succinate and ribociclib trifluoroacetate. The present invention also relates to pharmaceutical compositions comprising a crystalline form of ribociclib succinate and at least a pharmaceutically acceptable carrier. It further relates to the use of such compositions in the treatment of cancer.
    Type: Application
    Filed: October 26, 2018
    Publication date: September 3, 2020
    Applicant: FRESENIUS KABI ONCOLOGY LIMITED
    Inventors: Sarbjot Singh SOKHI, Govind SINGH, Saswata LAHIRI, Maneesh Kumar PANDEY, Raj Narayan TIWARI, Sonu SHUKLA, Sachin MUSMADE, Heena DUA, Walter CABRI
  • Publication number: 20200140427
    Abstract: The present invention relates to a process for preparing the Alectinib or a pharmaceutically acceptable salt thereof using lesser reaction steps and also eliminating expensive and time-consuming column chromatography. The invention also relates to novel polymorphic forms of Alectinib and Alectinib hydrochloride.
    Type: Application
    Filed: July 4, 2018
    Publication date: May 7, 2020
    Applicant: FRESENIUS KABI ONCOLOGY LIMITED
    Inventors: Vinod Singh TOMAR, Abul AZIM, Nitin GUPTA, Saswata LAHIRI, Walter CABRI
  • Patent number: 10577433
    Abstract: The present application provides an improved process for the preparation of sugammadex by reacting a salt of 3-mercapto propionic acid with 6-per-deoxy-6-per-halo-?-cyclodextrin in a suitable organic solvent. This application also provides crystalline form of a salt of 3-mercapto propionic acid, preferably di sodium salt of 3-mercapto propionic acid and its use for the preparation of sugammadex, whereas formula (I) shows the sodium salt of sugammadex.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: March 3, 2020
    Assignee: Fresenius Kabi iPSUM S.r.l.
    Inventors: Walter Cabri, Antonio Ricci, Jacopo Zanon, Saswata Lahiri, Govind Singh, Shivaji Haribhau Shelke, Tapanjyoti Biswal, Nitin Kumar, Madan Singh
  • Publication number: 20200031850
    Abstract: The present invention relates to an improved process for the preparation of a compound of formula (I), wherein PG1 may be independently selected from tert-butyloxycarbonyl (Boc), phthaloyl, 9-fluorenylmethyloxycarbonyl (Fmoc), triphenylmethyl (Trityl), carboxybenzyl (Cbz), trifluoroacetyl, benzyl (Bn), benzylidene, methanesulfonyl (Mesyl), toluene sulfonyl (Tosyl) or acyl; its isolation as solid and use for the preparation of the compound of formula (IV), in particular the compound of formula (IV) i.e. [(1R)-3-methyl-1[[(2S)-1-oxo-3-phenyl-2-[(pyrazinylcarbonyl) amino]propyl]amino]butyl] boronic acid with more than 99.95% chiral purity, as measured by HPLC.
    Type: Application
    Filed: February 19, 2018
    Publication date: January 30, 2020
    Applicant: FRESENIUS KABI ONCOLOGY LIMITED
    Inventors: Maneesh Kumar PANDEY, Raj Narayan TIWARI, Sonu SHUKLA, Sarbjot Singh SOKHI, Govind SINGH, Saswata LAHIRI, Walter CABRI
  • Patent number: 10544109
    Abstract: The present invention relates to an improved process for the preparation of xylene linked cyclam compounds. More particularly the invention provides a process for preparation of high purity plerixafor which does not involve the use of expensive chemicals, hazardous reagents or tedious purification techniques. Invention also provides novel intermediate useful for preparation of desired compound in high purity.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: January 28, 2020
    Assignee: Fresenius Kabi Oncology Ltd.
    Inventors: Hemant Kumar Singh, Sandeep Kumar, Ghanashyam Madhukar Sonavane, Vishal Handa, Chandan Kumar Gupta, Sunil Sanghani, Potru Sivaiah, Saswata Lahiri, Walter Cabri, Nitin Gupta
  • Publication number: 20190284308
    Abstract: The present application provides an improved process for the preparation of sugammadex by reacting a salt of 3-mercapto propionic acid with 6-per-deoxy-6-per-halo-?-cyclodextrin in a suitable organic solvent. This application also provides crystalline form of a salt of 3-mercapto propionic acid, preferably di sodium salt of 3-mercapto propionic acid and its use for the preparation of sugammadex, whereas formula (I) shows the sodium salt of sugammadex.
    Type: Application
    Filed: March 20, 2017
    Publication date: September 19, 2019
    Applicant: FRESENIUS KABI IPSUM S.R.L.
    Inventors: Walter CABRI, Antonio RICCI, Jacopo ZANON, Saswata LAHIRI, Govind SINGH, Shivaji Haribhau SHELKE, Tapanjyoti BISWAL, Nitin KUMAR, Madan SINGH