US Patent Issued to GUANGZHOU MAXINOVEL PHARMACEUTICALS on Nov. 18 for "Thienopyrimidine derivative and preparation method therefor" (Chinese Inventors)

ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,300, issued on Nov. 18, was assigned to GUANGZHOU MAXINOVEL PHARMACEUTICALS Co. LTD. (Guangdong, China).

"Thienopyrimidine derivative and preparation method therefor" was invented by Yuguang Wang (Guangdong, China), Tianzhi Wu (Guangdong, China) and Nong Zhang (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a thienopyrimidine derivative and a preparation method therefor. Provided is a method for preparing a compound as shown in formula B, which method is characterized by comprising the following steps: subjecting a compound as shown in formula C with a compound as shown in formula K to a coupling reaction as shown belo...