Patents by Inventor Braja Sundar Pradhan

Braja Sundar Pradhan 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: 20180111938
    Abstract: The present invention relates to a process of preparing intermediates of Formula (I). The process comprises of reacting compound of Formula (III) with compound of Formula (V) in the presence of a solvent selected from an alcohol, ether or water to form compound of Formula (I) wherein, R1 is selected from —NH2, Cl, Br, NHCOR?, wherein R? is alkyl, aryl, Schiff's base of formula N?CHR?, wherein R? is alkyl or aryl; R2 is selected from H, alkyl; R3 and R4, each independently is H; R5 and R6, each independently is H, alkyl; R7 is H, alkyl; and R8 is H, alkyl.
    Type: Application
    Filed: May 4, 2016
    Publication date: April 26, 2018
    Inventors: Braja Sundar PRADHAN, Kommireddy AMARNATH, Naresh VEMPALA, Md. Ataur RAHMAN
  • Patent number: 8664417
    Abstract: The invention provides for a process for the preparation of a silylferrocene compound, comprising the steps of treating ferrocene with a 4-chloroalkyryl chloride in the presence of an lewis acid catalyst and an organic solvent to obtain the acylated product, reducing the acylated product to obtain the 4-chloralkylferrocene, treating the 4-chloroalkylferroce with a metal under Grignard reaction conditions to form its corresponding Grignard intermediate compound; and reacting with chloroalkylsilane in-situ to give the silylferrocene compound. The silylferrocene compound 4-(dimethylsilyl)butylferrocene can be prepared by the process of the invention.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: March 4, 2014
    Assignee: CBZ Chemicals Limited
    Inventor: Braja Sundar Pradhan
  • Patent number: 8278468
    Abstract: The invention relates to a process for preparing furanose derivatives, to furanose intermediates used in said process and to the use of said derivatives in the manufacture of atorvastatin.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: October 2, 2012
    Assignee: CBZ Chemicals Limited
    Inventor: Braja Sundar Pradhan
  • Publication number: 20120209019
    Abstract: The invention provides for a process for the preparation of a silylferrocene compound, comprising the steps of treating ferrocene with a 4-chloroalkyryl chloride in the presence of an lewis acid catalyst and an organic solvent to obtain the acylated product, reducing the acylated product to obtain the 4-chloralkylferrocene, treating the 4-chloroalkylferroce with a metal under Grignard reaction conditions to form its corresponding Grignard intermediate compound; and reacting with chloroalkylsilane in-situ to give the silylferrocene compound. The silylferrocene compound 4-(dimethylsilyl)butylferrocene can be prepared by the process of the invention.
    Type: Application
    Filed: October 18, 2010
    Publication date: August 16, 2012
    Inventor: Braja Sundar Pradhan
  • Patent number: 8115010
    Abstract: The invention relates to a process for preparing furanose derivatives, to furanose intermediates used in said process and to the use of said derivatives in the manufacture of atorvastatin.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: February 14, 2012
    Assignee: CBZ Chemicals Limited
    Inventor: Braja Sundar Pradhan
  • Publication number: 20120016135
    Abstract: The invention relates to a process for preparing furanose derivatives, to furanose intermediates used in said process and to the use of said derivatives in the manufacture of atorvastatin.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Inventor: Braja Sundar PRADHAN
  • Publication number: 20110263870
    Abstract: The present invention relates to two novel pyrrole derivatives [3-Phenyl-4-(phenylcarbamoyl)-2-(4-fluorophenyl)-5-(1-methylethyl)-pyrrole-1-yl]methyl(diphenyl)phosphine oxide and Diethyl [3-Phenyl-4-(phenylcarbamoyl)-2-(4-fluorophenyl)-5-(1-methylethyl)-pyrrole-1-yl]methylphosphonate. These pyrrole derivatives can be used as intermediates for the synthesis of the anticholesterol drug atorvastatin.
    Type: Application
    Filed: April 21, 2011
    Publication date: October 27, 2011
    Applicant: HELVETICA INDUSTRIES (P) LIMITED
    Inventor: Braja SUNDAR PRADHAN
  • Publication number: 20100179331
    Abstract: The invention relates to a process for preparing furanose derivatives, to furanose intermediates used in said process and to the use of said derivatives in the manufacture of atorvastatin.
    Type: Application
    Filed: June 12, 2008
    Publication date: July 15, 2010
    Inventor: Braja Sundar Pradhan