Koji Ohsaka

Title: Koji Ohsaka: Innovator in Amino Acid Synthesis

Introduction

Koji Ohsaka is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of amino acid synthesis, particularly through his innovative processes for preparing D-alloisoleucine. His work has implications for various applications in biochemistry and pharmaceuticals.

Latest Patents

Ohsaka holds a patent for a process titled "Process for preparing D-alloisoleucine and intermediates for preparation." This patent discloses a novel method for synthesizing D-alloisoleucine, as well as an improved process for epimerizing L-isoleucine. The first process involves using a (2S, 3S)-tartaric acid derivative combined with an epimer mixture of L-isoleucine and D-alloisoleucine in a reaction medium. This results in the formation of a complex that can be decomposed to isolate D-alloisoleucine. The second process involves suspending L-isoleucine in an inert solvent and epimerizing it in the presence of saturated lower fatty acids and salicylaldehyde.

Career Highlights

Koji Ohsaka is associated with Yamakawa Chemical Industry Co., Ltd., where he has been able to apply his expertise in amino acid synthesis. His innovative approaches have contributed to advancements in the field and have positioned him as a key figure in his industry.

Collaborations

Ohsaka has worked alongside notable colleagues such as Hirofumi Noda and Kenichi Sakai. Their collaborative efforts have further enhanced the research and development initiatives within their organization.

Conclusion

Koji Ohsaka's contributions to the field of amino acid synthesis through his patented processes demonstrate his innovative spirit and dedication to advancing biochemistry. His work continues to influence the industry and inspire future research.