Patents by Inventor Juan C. Colberg

Juan C. Colberg 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).

  • Coupling process and intermediates useful for preparing cephalosporins
    Patent number: 7129350
    Abstract: A process for the preparation of 3-cyclic-ether-substituted cephalosporins of formula I wherein the group CO2R1 is a carboxylic acid or a carboxylate salt and R2 has the formula: wherein A1 and A2 have the meanings given in the specification by reacting compound of formula II: wherein R2 is as defined above and R3 is para-nitrobenzyl or allyl with a compound R2 L wherein R2 is as defined above; and L is di-(C1-6 alkyl)phosphorothioate in the presence of a solvent and a base.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: October 31, 2006
    Assignee: Pfizer, Inc.
    Inventors: Juan C. Colberg, Maurizio Zenoni, Giovanni Fogliato, Alessandro Donadelli
  • Process and ester derivatives useful for preparation of cephalosporins
    Publication number: 20040267008
    Abstract: This invention relates a process for preparing a compound of formula (I) 1
    Type: Application
    Filed: February 17, 2004
    Publication date: December 30, 2004
    Applicant: Pfizer Inc
    Inventors: Juan C. Colberg, John L. Tucker, Maurizio Zenoni, Giovanni Fogliato, Alessandro Donadelli, Isao Nagakura, Hiromasa Morita, Hideyuki Matsuo
  • Coupling process and intermediates useful for preparing cephalosporins
    Publication number: 20040167327
    Abstract: This invention relates to a novel process for the preparation of 3-cyclic-ether-substituted cephalosporins of formula I 1
    Type: Application
    Filed: February 11, 2004
    Publication date: August 26, 2004
    Inventors: Juan C. Colberg, Murizio Zenoni, Giovanni Fogliato, Alessandro Donadelli
  • Coupling process and intermediates useful for preparing cephalosporins
    Publication number: 20020198375
    Abstract: The process of the present invention and the preparation of the compound of the present invention are illustrated in the following reaction schemes. Except where otherwise indicated, in the reaction schemes and discussion that follow, substituents R1, R2, R3, L, A1, A2 and X are as defined above unless otherwise described.
    Type: Application
    Filed: December 4, 2001
    Publication date: December 26, 2002
    Applicant: Pfizer Inc.
    Inventors: Juan C. Colberg, Maurizio Zenoni, Giovanni Fogliato, Alessandro Donadelli
  • Process and ester derivatives useful for preparation of cephalosporins
    Publication number: 20020099205
    Abstract: This invention relates a process for preparing a compound of formula (I) 1
    Type: Application
    Filed: December 4, 2001
    Publication date: July 25, 2002
    Applicant: Pfizer Inc.
    Inventors: Juan C. Colberg, John L. Tucker, Maurizio Zenoni, Giovanni Fogliato, Alessandro Donadelli