Patents by Inventor Peimin Lee

Peimin Lee 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 synthesis of androstane 17-? carbothioic acid and relative compounds thereof
    Patent number: 7935837
    Abstract: A process for synthesis of androstane 17-? carbothioic acid is provided. The process includes mixing an androstane 17-? carboxylic acid and a coupling reagent, and adding an alkanethioic acid to form an androstane 17-? carbothioic acid, wherein the androstane 17-? carbothioic acid has the formula (I): wherein R1 represents hydrogen or haloalkyl groups, R2 represents C1-8 linear alkyl groups, C1-8 branched alkyl groups, C1-6 unsaturated acyclic groups or aromatic groups, R3 represents hydrogen or hydroxyl, R4 represents hydrogen, bromine, chlorine or fluorine and R5 represents hydrogen, bromine, chlorine or fluorine. The process is a one-pot reaction.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: May 3, 2011
    Assignee: Corum Inc.
    Inventors: Nai-Hsuan Hsu, Chu-Yi Pang, Chien-Jen Wu, Chi-Jen Huang, Chia-Jung Hsu, Peimin Lee
  • PROCESS FOR SYNTHESIS OF ANDROSTANE 17-BETA CARBOTHIOIC ACID AND RELATIVE COMPOUNDS THEREOF
    Publication number: 20090275767
    Abstract: A process for synthesis of androstane 17-? carbothioic acid is provided. The process includes mixing an androstane 17-? carboxylic acid and a coupling reagent, and adding an alkanethioic acid to form an androstane 17-? carbothioic acid, wherein the androstane 17-? carbothioic acid has the formula (I): wherein R1 represents hydrogen or haloalkyl groups, R2 represents C1-8 linear alkyl groups, C1-8 branched alkyl groups, C1-6 unsaturated acyclic groups or aromatic groups, R3 represents hydrogen or hydroxyl, R4 represents hydrogen, bromine, chlorine or fluorine and R5 represents hydrogen, bromine, chlorine or fluorine. The process is a one-pot reaction.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 5, 2009
    Applicant: CORUM INC.
    Inventors: Nai-Hsuan Hsu, Chu-Yi Pang, Chien-Jen Wu, Chi-Jen Huang, Chia-Jung Hsu, Peimin Lee