US Patent Issued to ZHEJIANG UNIVERSITY on May 6 for "3,3,3',3'-tetramethyl-1,1'-spirobiindane-7,7'-diol" (Chinese Inventors)

ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,497, issued on May 6, was assigned to ZHEJIANG UNIVERSITY (Zhejiang, China).

"3,3,3',3'-tetramethyl-1,1'-spirobiindane-7,7'-diol" was invented by Xufeng Lin (Hangzhou, China), Huanyu Shan (Hangzhou, China) and Qiaoxia Zhou (Hangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided herein is 3,3,3',3'-tetramethyl-1,1'-spirobiindane-7,7'-diol, which is a compound represented by formula I, or an enantiomer or a raceme thereof. The is prepared with a 3,3,3',3'-tetramethyl-1,1'-spirobiindane-7,7'-diol 3,3,3',3'-tetramethyl-1,1'-spirobiindane-7,7'-dicarbaldehyde derivative as a starting material through a Baeyer-Villiger oxidation rearrangem...