Patents by Inventor Takeshi Sunakami

Takeshi Sunakami 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 producing heterocyclic aldehyde
    Patent number: 7342116
    Abstract: A process is disclosed for preparing a heterocyclic aldehyde by oxidizing a heterocyclic alcohol with high selectivity and high yield. Specifically, the heterocyclic aldehyde is prepared by reacting a heterocyclic compound having at least one hydroxymethyl group bonded to a carbon atom of a heterocyclic ring with a hypohalogenous acid salt in the presence of a base to oxidize the hydroxymethyl group, wherein reaction is conducted in the co-presence of a 2,2,6,6-tetramethylpiperidine-1-oxyl derivative having at least two 2,2,6,6-tetramethylpiperidine-1-oxyl-4-yl groups.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: March 11, 2008
    Assignee: Koei Chemical Co., Ltd.
    Inventors: Yasuhiro Shiomi, Osamu Uno, Akio Ohta, Takeshi Sunakami
  • Process for producing heterocyclic aldehyde
    Publication number: 20050124807
    Abstract: The present invention provides a process for preparing a heterocyclic aldehyde by oxidizing a heterocyclic alcohol with high selectivity and high yield. Specifically, the heterocyclic aldehyde is prepared by reacting a heterocyclic compound having at least one hydroxymethyl group bonded to a carbon atom of a heterocyclic ring with a hypohalogenous acid salt in the presence of a base to oxidize the hydroxymethyl group, wherein reaction is conducted in the co-presence of a 2,2,6,6-tetramethylpiperidine-1-oxyl derivative having at least two 2,2,6,6-tetramethylpiperidine-1-oxyl-4-yl groups.
    Type: Application
    Filed: March 25, 2003
    Publication date: June 9, 2005
    Inventors: Yasuhiro Shiomi, Osamu Uno, Akio Ohta, Takeshi Sunakami