Patents by Inventor Kanagaraj Sureshkumar

Kanagaraj Sureshkumar 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).

  • Process for the preparation of cephalosporin antibiotic
    Patent number: 7345169
    Abstract: An improved one-pot process for the preparation of Ceftiofur of the formula (I) or its salt, without isolating intermediate compound
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: March 18, 2008
    Assignee: Orchid Chemicals & Pharmaceuticals Ltd.
    Inventors: Udayampalayam P. Senthilkumar, Kanagaraj Sureshkumar, Singaravel Mohan, Lakshminarayanan Arunkumar
  • Process for the preparation of 3-methylcepham derivatives
    Patent number: 7273935
    Abstract: A process for the preparation of 3-methylcepham-4-carboxylate of the formula (I). wherein R2 and R3 may be same or different and represent hydrogen, halogen, amino, alkyl, phenacetamido, substituted acetamido, phthalimido with a proviso that both R2 and R3 are not NH2, phenacetamido, phthalimido and the like; R1 represents a lower alkyl, p-methoxybenzyl, p-nitrobenzyl, o-nitrobenzyl, o-methoxybenzyl, o-chlorobenzyl or diphenylmethyl group, or a suitable ester residue which can be deprotected at a latter stage, L represents a leaving group; which comprises cyclizing the compound of formula (III) using a cyclizing agent in the presence of organic or inorganic nitrites and a solvent at a temperature in the range of ?40° C. to +60° C. to obtain compound of formula (I).
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: September 25, 2007
    Assignee: Orchid Chemicals & Pharmaceuticals, Ltd.
    Inventors: Pandurang Balwant Deshpande, Udayampalayam Palanisamy Senthilkumar, Andrew Gnanaprakasam, Kanagaraj Sureshkumar
  • Process for the preparation of cephalosporin antibiotic
    Publication number: 20060094872
    Abstract: An improved process for the preparation of Ceftiofar sodium of formula (I) without isolating intermediate compound of formula (IV)
    Type: Application
    Filed: December 6, 2005
    Publication date: May 4, 2006
    Applicant: Orchid Chemicals & Pharmaceuticals Ltd.
    Inventors: Udayampalayam Senthilkumar, Kanagaraj Sureshkumar, Singaravel Mohan, Lakshminarayanan Arunkumar, Bakthavachalam Ananthan
  • Process for the preparation of cephalosporin antibiotic
    Publication number: 20060058281
    Abstract: An improved one-pot process for the preparation of Ceftiofur of the formula (I) or its salt, without isolating intermediate compound.
    Type: Application
    Filed: October 3, 2005
    Publication date: March 16, 2006
    Applicant: Orchid Chemicals & Pharmaceuticals Ltd.
    Inventors: Udayampalayam Senthilkumar, Kanagaraj Sureshkumar, Singaravel Mohan, Lakshminarayanan Arunkumar
  • Process for the preparation of 3-methylcepham derivatives
    Publication number: 20050070705
    Abstract: A process for the preparation of 3-methylcepham-4-carboxylate of the formula (I). wherein R2 and R3 may be same or different and represent hydrogen, halogen, amino, alkyl, phenacetamido, substituted acetamido, phthalimido with a proviso that both R2 and R3 are not NH2, phenacetamido, phthalimido and the like; R1 represents a lower alkyl, p-methoxybenzyl, p-nitrobenzyl, o-nitrobenzyl, o-methoxybenzyl, o-chlorobenzyl or diphenylmethyl group, or a suitable ester residue which can be deprotected at a latter stage, L represents a leaving group; which comprises cyclizing the compound of formula (III) using a cyclizing agent in the presence of organic or inorganic nitrites and a solvent at a temperature in the range of ?40° C. to +60° C. to obtain compound of formula (I).
    Type: Application
    Filed: August 23, 2004
    Publication date: March 31, 2005
    Applicant: ORCHID CHEMICALS & PHARMACEUTICALS LTD.
    Inventors: Pandurang Deshpande, Udayampalayam Senthilkumar, Andrew Gnanaprakasam, Kanagaraj Sureshkumar