Patents Represented by Attorney Jayadeep R. Desmukh, Esq.

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  • Process for the synthesis of ganciclovir
    Patent number: 7078524
    Abstract: The present invention relates to an industrial useful process for the synthesis of antiviral compound, ganciclovir which comprises dissolving a mixture containing N-7 and N-9 isomers of structural formulae, II and III, respectively: in a solvent or a mixture of solvents; separating the N-7 and N-9 isomers; and hydrolizing the N-9 isomer to obtain ganciclovir.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: July 18, 2006
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Jayachandra Suresh Babu, Purna Chandra Ray, Yatendra Kumar, Chandra Has Khanduri
  • Cost effective method for selective methylation of erythromycin A derivatives
    Patent number: 6900296
    Abstract: The invention relates to a cost effective and industrially advantageous process for the selective methylation of a hydroxy group at the 6 position of erythromycin A derivative which comprised methylating the erythromycin A derivative with a methylating agent in a mixture of toluene and a ploar aprotic solvent.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: May 31, 2005
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Mohammad Salman, Parma Chandra Ray, Kiran Kumar Gangakhedkar, Harish Niranjan Lal Dorwal, Naresh Kumar