{"title":"Pd(II)-Catalyzed Enantioselective C-H Olefination and Photoregulation of Sterically-Hindered Diarylethenes","authors":"Guanlun Zhang, Xu Wu, Shiyu Mao, Mengqi Li, Honglong Hu, Bing-Feng Shi, Weihong Zhu","doi":"10.1039/d4sc05375c","DOIUrl":null,"url":null,"abstract":"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 isomer and central chirality of ring-closed isomer can break through the bottleneck of the 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 LC 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.","PeriodicalId":9909,"journal":{"name":"Chemical Science","volume":null,"pages":null},"PeriodicalIF":7.6000,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Science","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d4sc05375c","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
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 isomer and central chirality of ring-closed isomer can break through the bottleneck of the 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 LC 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.
期刊介绍:
Chemical Science is a journal that encompasses various disciplines within the chemical sciences. Its scope includes publishing ground-breaking research with significant implications for its respective field, as well as appealing to a wider audience in related areas. To be considered for publication, articles must showcase innovative and original advances in their field of study and be presented in a manner that is understandable to scientists from diverse backgrounds. However, the journal generally does not publish highly specialized research.