Zheqing Wang

Title: Zheqing Wang: Innovator in Chemical Processes

Introduction

Zheqing Wang is a notable inventor based in Union City, CA (US). He has made significant contributions to the field of chemistry, particularly in the preparation of specialized compounds. With a total of 2 patents to his name, Wang's work showcases his innovative approach to chemical processes.

Latest Patents

Wang's latest patents include a process for the preparation of alkyl 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylate and its analogs. This patent outlines a method that involves a reaction workup for Claisen condensation, where the enolate salt is acidified after removing starting materials and byproducts. The process also details a method for drying alkyl difluoroacetoacetate before its use in subsequent reactions. Additionally, it describes the use of sodium carbonate and/or potassium carbonate to promote the ring-closure reaction, effectively producing the desired alkyl compound while eliminating the need for recrystallization of the final product.

Another significant patent by Wang is for the preparation of alkyl 3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxylic acid ester. This process is economically advantageous and involves the acidification of the sodium enolate of alkyl difluoroacetoacetate using carbonic acid generated in situ. The patent also highlights a unique ring closure reaction that utilizes a two-phase system with a weak base.

Career Highlights

Zheqing Wang is currently associated with Kingchem LLC, where he continues to innovate in the field of chemical processes. His work has not only advanced the understanding of chemical reactions but has also contributed to the development of more efficient methods for synthesizing complex compounds.

Collaborations

Wang collaborates with talented individuals such as Angang Wang and Zhenwei Li, enhancing the innovative capacity of his projects. Their combined expertise fosters a productive environment for research and development.

Conclusion

Zheqing Wang's contributions to chemical processes through his patents reflect his dedication to innovation in the field. His work at Kingchem LLC and collaborations with fellow researchers further underscore his impact on the industry.