Patents by Inventor Keichirou Yamamoto

Keichirou Yamamoto 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).

  • Method for preparation of sulphostin and its analogue or intermediates thereof
    Publication number: 20050020834
    Abstract: A method for preparing a compound represented by the following general formula (5) where, n is an integer of 0 to 3; and Y represents a protecting group for an amino group, the method including the steps of reacting a compound represented by the following general formula (3) where n and Y are as described above, with a silylating agent, and subsequently reacting it with P (?O) T3, where T represents a halogen atom, and further with ammonia.
    Type: Application
    Filed: December 16, 2002
    Publication date: January 27, 2005
    Inventors: Masashi Nagai, Hiroko Yamazaki, Keichirou Yamamoto, Masatoshi Abe