Halogen Containing Patents (Class 204/157.84)
  • METHOD FOR PREPARING LACTAMES, COMPRISING A PHOTONITROSATION STEP, FOLLOWED BY A BECKMANN TRANSPOSITION STEP
    Publication number: 20110137027
    Abstract: The invention relates to a method for preparing lactames, according to which a photonitrosation of a cycloallcane is carried out using nitrosyl chloride (NOCI). According to the invention, said photonitrosation is carried out by means of LEDs emitting a monochromatic light. The method according to the invention can also include a step comprising Beckmann transposition/dechlorination of the oxime hydrochloride generated during said phonitrosation, preferably carried out in a glass microreactor.
    Type: Application
    Filed: May 14, 2009
    Publication date: June 9, 2011
    Applicant: Arkema Frances
    Inventor: Thierry Aubert
  • Process for the preparation of cephalosporin intermediate and its use for the manufacture of cephalosporin compounds
    Publication number: 20030199712
    Abstract: The present invention relates to a process for the preparation of 4-halogeno-2-substitutedimino-3-oxo-butyric acid of formula (I) 1
    Type: Application
    Filed: September 18, 2002
    Publication date: October 23, 2003
    Applicant: Orchid Chemicals and Pharmaceuticals Limited
    Inventors: Pandurang Balwant Deshpande, Parven Kumar Luthra, Pratik Ramesh Sathe, Sivakumaran Sundaravadivelan, Praveen Nagesh Ganesh