Patents by Inventor Gregor Welti

Gregor Welti 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).

  • Processes for the preparation of furazanobenzimidazoles and crystalline forms thereof
    Patent number: 11891382
    Abstract: The present invention provides processes for preparing a compound of formula (I) and pharmaceutically acceptable salts thereof, comprising deprotecting a compound of formula (II), wherein each R3 independently represents a tertiary alkyl group, preferably wherein each R3 is tertiary butyl. The invention also provides intermediates useful for preparing compounds of formula (I) and processes for preparing these intermediates. Additionally the invention provides polymorphic forms of the dichloride salt of the compound of formula (I) and their use in the treatment of proliferative disorders.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: February 6, 2024
    Inventors: Gregor Welti, Markus Heubes, David Tagliaferri
  • PROCESSES FOR THE PREPARATION OF FURAZANOBENZIMIDAZOLES AND CRYSTALLINE FORMS THEREOF
    Publication number: 20210115032
    Abstract: The present invention provides processes for preparing a compound of formula (I) and pharmaceutically acceptable salts thereof, comprising deprotecting a compound of formula (II), wherein each R3 independently represents a tertiary alkyl group, preferably wherein each R3 is tertiary butyl. The invention also provides intermediates useful for preparing compounds of formula (I) and processes for preparing these intermediates. Additionally the invention provides polymorphic forms of the dichloride salt of the compound of formula (I) and their use in the treatment of proliferative disorders.
    Type: Application
    Filed: April 24, 2018
    Publication date: April 22, 2021
    Inventors: Gregor WELTI, Markus HEUBES, David TAGLIAFERRI
  • Process for preparing (-)-(1S, 4R) N-protected 4-amino-2-cyclopentene-1-carboxylate esters
    Patent number: 6495711
    Abstract: The invention relates to a process for preparing (−)-(1S,4R) N protected 4-amino-2-cylcopentene-1-carboxylate esters represented by the formula (I) wherein R1 and R2 are as described within the specification.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: December 17, 2002
    Assignee: BioCryst Pharmaceuticals Inc.
    Inventors: Max Rey, Gregor Welti, Cynthia Maryanoff
  • Process for preparing (-)-(1S, 4R) N-protected 4-amino-2-cyclopentene-1-carboxylate esters
    Publication number: 20020052524
    Abstract: The invention relates to a process for preparing (−)-(1S,4R) N protected 4-amino-2-cylcopentene-1-carboxylate esters represented by the formula (I) 1
    Type: Application
    Filed: December 18, 2001
    Publication date: May 2, 2002
    Inventors: Max Rey, Gregor Welti, Cynthia Maryanoff