US 12,291,497 B2
3,3,3′,3′-tetramethyl-1,1′-spirobiindane-7,7′-diol
Xufeng Lin, Hangzhou (CN); Huanyu Shan, Hangzhou (CN); and Qiaoxia Zhou, Hangzhou (CN)
Assigned to ZHEJIANG UNIVERSITY, Zhejiang (CN)
Filed by ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed on Mar. 22, 2022, as Appl. No. 17/700,503.
Application 17/700,503 is a continuation in part of application No. 17/040,550, granted, now 11,377,457, previously published as PCT/CN2018/086893, filed on May 15, 2018.
Prior Publication US 2022/0213015 A1, Jul. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 39/14 (2006.01); C07C 43/21 (2006.01)
CPC C07C 39/14 (2013.01) [C07C 43/21 (2013.01); C07C 2603/40 (2017.05)] 2 Claims
 
1. A 3,3,3′,3′-tetramethyl-1,1′-spirobiindane-7,7′-diol, being a compound represented by formula I, or an enantiomer thereof:

OG Complex Work Unit Chemistry
wherein R1 is selected from the group consisting of hydrogen, C1-C10 alkyl or perfluoroalkyl, C3-C6 cycloalkyl, C1-C4 alkoxy or perfluoroalkoxy, unsubstituted or substituted aryloxy, unsubstituted or substituted heteroaryloxy, unsubstituted or substituted arylmethyleneoxy, unsubstituted or substituted heteroarylmethyleneoxy, unsubstituted or substituted aryl, and unsubstituted or substituted heteroaryl; and R2 and R3 are each independently selected from the group consisting of hydrogen, halogen, C1-C10 alkyl or perfluoroalkyl, C3-C6 cycloalkyl, C1-C4 alkoxy or perfluoroalkoxy, unsubstituted or substituted aryloxy, unsubstituted or substituted heteroaryloxy, unsubstituted or substituted aryl, and unsubstituted or substituted heteroaryl; wherein the substituted aryloxy, the substituted aryl or the substituted heteroaryl has one or more substituents each independently selected from the group consisting of halogen, N-dimethylamino, C1-C4 alkyl or perfluoroalkyl, C3-C6 cycloalkyl, C1-C4 alkoxy or perfluoroalkoxy, methylenedioxy, aryl, aryloxy, and heteroaryl, and the heteroaryl is C5-C14 heteroaryl.