Chromium Containing Compound Utilized As Oxidizing Agent (e.g., Chromic Acid, Chromosulfuric Acid, Etc.) Patents (Class 554/140)
  • Method for preparing prostaglandin E-type compound
    Patent number: 6403817
    Abstract: The present invention discloses a method for preparing a prostaglandin E-type compound, in which prostaglandin F-type compound is used as an initiator to generate novel derivative of prostaglandin F-type compound through a silylation reaction, and eventually a prostaglandin E-type compound is obtained through an oxidation and a desilylation reaction.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: June 11, 2002
    Assignee: Everlight USA, Inc.
    Inventors: Chi-Hsiang Yao, Rung-Tian Suen, Yu-Liang Liu
  • Intermediates for the synthesis of 16-phenoxy-prostatrienoic acid derivatives and a preparing method thereof
    Patent number: 5571936
    Abstract: Intermediate compounds represented as formula (I) useful for the synthesis of 16-phenoxy-prostatrienoic acid derivatives and a preparing method thereof are disclosed. ##STR1## wherein R is tetrahydropyranyl, tetrahydrofuranyl, 2-ethoxyethyl, 3-t-butyldimethylsilyl triisopropylsilyl or triethylsilyl group; R.sup.1 and R.sup.2 are independently hydrogen or ester-forming group; P is hydrogen, trimethylsilyl or tri-n-butyltin; and wavy line means epistereoisomeric mixture.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: November 5, 1996
    Assignee: Korea Institute of Science and Technology
    Inventors: Hokoon Park, Sun Ho Jung, Yong Sup Lee, Ki Hong Nam