文献类型：期刊文献

英文题名：Pd(ii)-catalyzed enantioselective C-H olefination and photoregulation of sterically hindered diarylethenes

作者：Zhang, Guanlun[1];Wu, Xu[2];Mao, Shiyu[2];Li, Mengqi[1];Hu, Honglong[1];Shi, Bing-Feng[2];Zhu, Wei-Hong[1]

机构：[1]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Joint Int Res Lab Precis Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem,Feringa Nobel Priz, Shanghai 200237, Peoples R China;[2]Zhejiang Univ, Dept Ctr Chem Frontier Technol, Dept Chem, Hangzhou 310027, Peoples R China

年份：2024

卷号：15

期号：47

起止页码：20013

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20244717391135);WOS:【SCI-EXPANDED(收录号:WOS:001356420100001)，CCR-EXPANDED(收录号:WOS:001356420100001)】；

基金：This work was supported by the National Natural Science Foundation of China (T2488302, 92356301, 22338006, 22108076, 21925109, U22A20388, and 92256302), the National Key R&D Program of China (2022YFA1504302 and 2021YFF0701603), Fundamental Research Funds for the Central Universities (226-2023-00115 and 226-2022-00224), and Zhejiang Provincial NSFC (LD22B030003).

语种：英文

外文关键词：Enantioselectivity - Liquid crystals - Photochemical forming - Photorefractive crystals - Stereo image processing

摘要：Sterically hindered diarylethenes with intrinsic chirality have shown great potential in chiral signal regulation, light-controlled liquid crystals (LCs), etc. Their unique enantiospecific phototransformation between axial chirality of ring-open isomers and central chirality of ring-closed isomers can break through the bottleneck of interference between multiple chiral centers in traditional chiral diarylethenes. However, these intrinsic chiral diarylethenes require necessary chiral resolution through preparative chiral HPLC, typically resulting in limited separation efficiency and production scale. Here, we present an enantioselective olefination strategy to directly construct intrinsic chiral diarylethenes from a prochiral sterically hindered diarylethene, achieving high yields and enantioselectivity. The resulting isomers can be further decorated by incorporating mesogenic units, and the derivatives enable the successful reversible photoregulation of blue, green, and red reflection colors of LCs with excellent thermal stability, fatigue resistance, and little texture disorderliness, demonstrating the practical application potential of direct enantioselective olefination in photoregulation with intrinsic chiral diarylethenes.