Location History:
- Takarazuka, JA (1976 - 1977)
- Takarazuka, JP (1979 - 1981)
- Osaka, JP (1985 - 1986)
- Hyogo, JP (1988)
Company Filing History:
Years Active: 1976-1988
Title: Takeaki Umemura: Innovator in Optical Resolution and Insecticide Development
Introduction
Takeaki Umemura is a prominent inventor based in Takarazuka, Japan. He has made significant contributions to the field of chemistry, particularly in the development of methods for optical resolution and the production of insecticides. With a total of 8 patents to his name, Umemura's work has had a notable impact on agricultural chemistry.
Latest Patents
One of Umemura's latest patents is a method for the optical resolution of phenylacetic acid derivatives, specifically focusing on Alpha-isopropyl-p-chlorophenylacetic acid. This method utilizes optically active alpha-phenyl-beta-p-tolylethylamine or optically active alpha-phenylethylamine as the optical resolution agent. The process involves carrying out the reaction in a hydrophobic organic solvent, such as aliphatic and aromatic hydrocarbons, in the presence of water. The desired salt of the acid with the amine is then separated through selective crystallization. Another significant patent is the process for producing optically active cyclopentenolones, which serve as intermediates for pyrethroid insecticides. This process includes asymmetric hydrolysis of racemic carboxylate esters, followed by nitrate- or sulfonate-esterification, and concludes with hydrolysis of the esterification products.
Career Highlights
Umemura is currently associated with Sumitomo Chemical Company, Limited, where he continues to innovate and contribute to the field of chemical engineering. His work has been instrumental in advancing methods that enhance the efficacy and safety of insecticides, thereby benefiting agricultural practices.
Collaborations
Throughout his career, Umemura has collaborated with notable colleagues, including Ayumu Inoue and Tetsuhiko Watanabe. These collaborations have fostered a productive environment for research and development, leading to significant advancements in their respective fields.
Conclusion
Takeaki Umemura's contributions to the field of chemistry, particularly in optical resolution and insecticide development, highlight his innovative spirit and dedication to advancing agricultural science. His patents reflect a commitment to improving chemical processes that have far-reaching implications for the industry.