Patents by Inventor Johann Vastra

Johann Vastra 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).

  • Carbon-carbon bond creation method comprising the coupling of a transferable group and an acceptor group
    Patent number: 7524992
    Abstract: The invention relates to a carbon-carbon bond creation method comprising the coupling of a transferable group and an acceptor group. The inventive method comprises the following steps: a) activation of a siliceous compound bearing a transferable group by an activation agent; b) addition of an acceptor group-bearing derivative; and, simultaneously or in any consecutive order, c) addition of a palladacycle-type compound acting as a catalyst of the coupling reaction between the transferable group and the acceptor group with the creation of the carbon-carbon bond.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: April 28, 2009
    Assignee: Rhodia Chimie
    Inventor: Johann Vastra
  • Method for Acylation of an Aromatic Compound
    Publication number: 20080154049
    Abstract: A method for acylation of an aromatic compound, comprising reacting an aromatic compound and an acylating agent of the carboxylic acid type, in the presence of a Lewis acid and of a silylated reagent selected from the group consisting of halosilanes and halosiloxanes.
    Type: Application
    Filed: October 28, 2005
    Publication date: June 26, 2008
    Applicant: Shasun Pharma Solutions Limited
    Inventors: Damien Bourgeois, Joel Turconi, Johann Vastra
  • Carbon-carbon bond creation method comprising the coupling of a transferable group and an acceptor group
    Publication number: 20070010683
    Abstract: The invention relates to a carbon-carbon bond creation method comprising the coupling of a transferable group and an acceptor group. The inventive method comprises the following steps: a) activation of a siliceous compound bearing a transferable group by an activation agent; b) addition of an acceptor group-bearing derivative; and, simultaneously or in any consecutive order, c) addition of a palladacycle-type compound acting as a catalyst of the coupling reaction between the transferable group and the acceptor group with the creation of the carbon-carbon bond.
    Type: Application
    Filed: August 24, 2004
    Publication date: January 11, 2007
    Applicant: RHODIA-CHIMIE
    Inventor: Johann Vastra
  • Method for sulphonylating a hydroxylated organic compound
    Patent number: 6992199
    Abstract: The invention concerns a method for sulphonylating a hydroxylated organic compound. The invention concerns in particular aliphatic hydroxylated compounds and more particularly those which comprise on their aliphatic chain, an electroattractive group. The method for sulphonylating a hydroxylated organic compound is characterised in that it consists in reacting said compound, with a sulphonylating agent, in the presence of a sufficient amount of a Lewis acid.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: January 31, 2006
    Assignee: Rhodia Chimie
    Inventors: Johann Vastra, Laurent Saint-Jalmes
  • Method for sulphonylating a hydroxylated organic compound
    Publication number: 20040024257
    Abstract: The invention concerns a method for sulphonylating a hydroxylated organic compound. The invention concerns in particular aliphatic hydroxylated compounds and more particularly those which comprise on their aliphatic chain, an electroattractive group. The method for sulphonylating a hydroxylated organic compound is characterised in that it consists in reacting said compound, with a sulphonylating agent, in the presence of a sufficient amount of a Lewis acid.
    Type: Application
    Filed: August 11, 2003
    Publication date: February 5, 2004
    Inventors: Johann Vastra, Laurent Saint-Jalmes