Leon Xu

Title: The Innovative Contributions of Leon Xu

Introduction

Leon Xu is an accomplished inventor based in Issaquah, WA (US). He holds three patents that showcase his expertise in the field of photoactive agents. His work has significantly contributed to advancements in chemical processes and compositions.

Latest Patents

Leon Xu's latest patents include innovative compositions and methods for making a photoactive agent. One notable patent describes an improved two-stage reaction process for the production of mono-L-aspartyl chlorin e. In the first stage, an activation reaction occurs between chlorin e and a carbodiimide, resulting in a previously unknown anhydride. This reaction product is purified to eliminate a significant proportion of the precursors of di-L-aspartyl chlorin e. The purified activation reaction product contains a higher concentration of the unknown anhydride, which is then utilized in a second stage. This stage involves a coupling reaction with aspartate, producing a coupling reaction product with a significantly reduced concentration of di-L-aspartyl chlorin e6. This reduction facilitates the purification of mono-L-aspartyl chlorin e6 from the coupling reaction mixture.

Career Highlights

Throughout his career, Leon Xu has worked with notable companies such as Light Sciences Oncology Inc. and Purdue Pharmaceutical Products L.P. His experience in these organizations has allowed him to refine his skills and contribute to significant projects in the pharmaceutical and oncology sectors.

Collaborations

Leon Xu has collaborated with various professionals in his field, including his coworker Alexander J. Pallenberg. These collaborations have further enhanced his innovative capabilities and broadened his impact on the industry.

Conclusion

Leon Xu's contributions to the field of photoactive agents and his innovative patents reflect his dedication to advancing chemical processes. His work continues to influence the development of new technologies and methodologies in the industry.