Patents by Inventor Hongyan Shen

Hongyan Shen 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 4-methyloxazole-5-carboxamide
    Patent number: 8916715
    Abstract: A process for the preparation of 4-methyl-oxazole-5-carboxamide, an intermediate in the synthesis of pyridoxine, by reacting lower alkyl 4-methyl-oxazole-5-carboxy-late with a molar excess of anhydrous, liquid ammonia.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: December 23, 2014
    Assignee: DSM IP Assets B.V.
    Inventors: Werner Bonrath, Jocelyn Fischesser, Hongyan Shen
  • PROCESS FOR 4-METHYLOXAZOLE-5-CARBOXAMIDE
    Publication number: 20140206880
    Abstract: A process for the preparation of 4-methyl-oxazole-5-carboxamide, an intermediate in the synthesis of pyridoxine, by reacting lower alkyl 4-methyl-oxazole-5-carboxy-late with a molar excess of anhydrous, liquid ammonia.
    Type: Application
    Filed: May 31, 2012
    Publication date: July 24, 2014
    Applicant: DSM IP ASSETS B.V.
    Inventors: Werner Bonrath, Jocelyn Fischesser, Hongyan Shen
  • Preparation method of acylbenzenes
    Patent number: 8642800
    Abstract: A process for the production of acylbenzenes, comprising reacting diacetoxybenzoyl chloride with a Grignard reagent in the presence of an iron-containing catalyst. The acylbenzenes are useful intermediates in a multistep process for the preparation of resveratrol.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: February 4, 2014
    Assignee: DSM IP Assets B.V.
    Inventors: Vincent John Jephcote, Hongyan Shen
  • PREPARATION METHOD OF ACYLBENZENES
    Publication number: 20120022284
    Abstract: A process for the production of acylbenzenes, comprising reacting diacetoxybenzoyl chloride with a Grignard reagent in the presence of an iron-containing catalyst. The acylbenzenes are useful intermediates in a multistep process for the preparation of resveratrol.
    Type: Application
    Filed: February 22, 2010
    Publication date: January 26, 2012
    Inventors: Vincent J. Jephcote, Hongyan Shen