Patents by Inventor Bjorn Elman

Bjorn Elman 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 Preparing a Substituted Imidazopyridine Compound
    Publication number: 20090247755
    Abstract: The present invention provides a new process for large-scale preparation of substituted imidazopyridine compound of formula (I) wherein R1 is C1-C6 alkoxy or NH2 group, comprising the step of reacting a compound of formula (2) with a 3-halo-2-butanone compound in cyclohexanone.
    Type: Application
    Filed: June 10, 2009
    Publication date: October 1, 2009
    Inventors: Bjorn Elman, Silke Erbeck, Eric Thiemermann
  • Process for preparing a substituted imidazopyridine compound
    Publication number: 20060063797
    Abstract: The present invention provides a new process for large-scale preparation of substituted imidazopyridine compound of formula (1) wherein R1 is C1-C6 alkoxy or NH2 group, comprising the step of reacting a compound of formula (2) with a 3-halo-2-butanone compound in cyclohexanone.
    Type: Application
    Filed: April 14, 2005
    Publication date: March 23, 2006
    Inventors: Bjorn Elman, Silke Erbeck, Eric Thiemermann
  • Process for preparing a substituted imidazopyridine compound
    Patent number: 6900324
    Abstract: The present invention provides a new process for large-scale preparation of substituted imidazopyridine compound of formula (1) wherein R1 is C1-C6 alkoxy or NH2 group, comprising the step of reacting a compound of formula (2) with a 3-halo-2-butanone compound in cyclohexanone.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: May 31, 2005
    Assignee: AstraZeneca AB
    Inventors: Björn Elman, Silke Erbeck, Eric Thiemermann
  • Process for preparing a substituted imidazopyridine compound
    Publication number: 20040039013
    Abstract: The present invention provides a new process for large-scale preparation of substituted imidazopyridine compound of formula (1) wherein R1 is C1-C6 alkoxy or NH2 group, comprising the step of reacting a compound of formula (2) with a 3-halo-2-butanone compound in cyclohexanone.
    Type: Application
    Filed: June 27, 2003
    Publication date: February 26, 2004
    Inventors: Bjorn Elman, Silke Erbeck, Eric Thiemermann
  • Process for the production of cyclic sulfonium salts
    Patent number: 5525736
    Abstract: A process for the production of a 5-7 membered ring cyclic sulfonium salt compound, including a 5-7 membered ring cyclic sulfonium salt compound having a non-nucleophilic anion, is described. Members of the latter group are potentially useful as initiators for cationic polymerizations. The process comprises reacting a 1.4-, 1.5-, or 1.6-diol compound or a 5-7 membered ring cyclic ether compound with a mercapto compound and a strong protonic acid yielding the cyclic sulfonium salt compound. Some compounds described are also novel compounds per se.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: June 11, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Jan-Erik Nystrom, Per Engelhardt, Katarina Beierlein, Mikael Sellen, Bjorn Elman, Jan Vagberg, Martin Nylof
  • Initiators for polymerization
    Patent number: 5223591
    Abstract: Initiators for cationic polymerization by thermal activation, photochemical activation (UV-irradiation) or activation by electron bombardment are compounds wherein a heterocyclic, aryl substituted or aryl ring is fused to a sulfonium moiety in combination with a non-nucleophilic anion. During the activation of the initiator, a carbon-sulfur bond is broken leading to formation of a sulfide and a carbonium ion within the same molecule. The carbonium ion initiates the polymerization.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: June 29, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Johan Nyander, Sonny Jonsson, Bjorn Elman, Ann-Britt Pettersson, Per-Erik Sundell, Sven Gothe, Jan-Erik Nystrom