Hanqing Duan

Title: Hanqing Duan: Innovator in Silicon Compound Applications

Introduction

Hanqing Duan is a notable inventor based in Shanghai, China. He has made significant contributions to the field of chemistry, particularly in the use of silicon compounds in cyclization reactions. His innovative methods have the potential to enhance the efficiency of chemical processes.

Latest Patents

Hanqing Duan holds 1 patent for his work titled "Use of silicon compounds in cyclization reactions." This patent outlines a method for preparing 2-chloro-5-chloromethylpyridine by performing a cyclization reaction on 4,5-dichloro-4-methoxypentanenitrile in the presence of a silicon compound and an acylamide compound. Additionally, the patent describes a method for preparing 2-(chloromethyl)-5-(trifluoromethyl)-1,3,4-oxadiazole through a similar cyclization process involving 1-(chloroacetyl)-2-(trifluoroacetyl)hydrazine. The silicon and acylamide compounds serve as highly efficient cyclization reagents.

Career Highlights

Throughout his career, Hanqing Duan has worked with various companies, including Lanzhou Chemspec Technology Co., Ltd. and Shanghai Chemspec Corporation. His experience in these organizations has contributed to his expertise in chemical innovations.

Collaborations

Hanqing Duan has collaborated with notable coworkers such as Li He and Xiaoliang Li. Their joint efforts have likely fostered advancements in their respective fields.

Conclusion

Hanqing Duan's work in the application of silicon compounds in cyclization reactions showcases his innovative spirit and dedication to advancing chemical processes. His contributions are valuable to the scientific community and highlight the importance of innovation in chemistry.