7420-84-0Relevant articles and documents
Photomechanical Luminescence from Through-Space Conjugated AIEgens
Fan, Jianzhong,Guo, Jingjing,Liu, Xinzhi,Tang, Ben Zhong,Zhao, Zujin
, p. 8828 - 8832 (2020)
Transforming molecular motions into the macroscopic scale is a topic of great interest to nanoscience. The photomechanical effect is a promising strategy to achieve this goal. Herein, we report an intriguing photomechanical luminescence driven by the photodimerization of 2-phenylbenzo[b]thiophene 1,1-dioxide (P-BTO) in molecular crystals and elucidate the working mechanism and substituent effect through crystallographic analysis and theoretical calculations. Striking splitting, hopping, and bending mechanical behaviors accompanied by a significant blue fluorescence enhancement are observed for P-BTO crystals under UV light, which is attributed to the formation of photodimer 2P-BTO. Although 2P-BTO is poorly π-conjugated because of the central cyclobutane ring, it exhibits prominent through-space conjugation and aggregation-induced emission (AIE), affording strong solid-state blue fluorescence at 415 nm with an excellent quantum yield of up to 96.2 %.
Highly Efficient Enantioselective Synthesis of Chiral Sulfones by Rh-Catalyzed Asymmetric Hydrogenation
Yan, Qiaozhi,Xiao, Guiying,Wang, Ying,Zi, Guofu,Zhang, Zhanbin,Hou, Guohua
supporting information, p. 1749 - 1756 (2019/01/25)
A highly efficient and enantioselective Rh-(R,R)-f-spiroPhos complex catalyzed hydrogenation of a series of unsaturated sulfones has been developed. With Rh-(R,R)-f-spiroPhos catalyst under mild conditions, not only the asymmetric hydrogenation of both the 3,3-diaryl and exocyclic α,β-unsaturated sulfones was first realized with up to 99.9% ee but also 3-alkyl-3-aryl and benzo[b]thiophene-1,1-dioxides were successfully hydrogenated to the corresponding chiral sulfones with excellent enantioselectivities (up to 99.4% ee) regardless of the steric hindrance, electronic property, and geometry of the substrates. Moreover, this reaction offers a route to (S)-(+)-ar-turmerone as a spice flavor, which is an important synthetic intermediate of pharmaceuticals.
Iridium-Catalyzed Asymmetric Hydrogenation of Benzo[b]thiophene 1,1-Dioxides
Tosatti, Paolo,Pfaltz, Andreas
supporting information, p. 4579 - 4582 (2017/04/11)
An efficient iridium-catalyzed asymmetric hydrogenation of substituted benzothiophene 1,1-dioxides is described. The use of iridium complexes with chiral pyridyl phosphinite ligands provides access to highly enantiomerically enriched sulfones with substituents at the 2- and 3-position. Sulfones of this type are of interest as core structures of agrochemicals and pharmaceuticals. Moreover, they can be further reduced to chiral 2,3-dihydrobenzothiophenes.
An unexpected reaction of 2-alkynylaryldiazonium tetrafluoroborate with sulfur dioxide
Luo, Yong,Pan, Xiaolin,Chen, Chen,Yao, Liangqing,Wu, Jie
supporting information, p. 180 - 182 (2015/01/09)
An unexpected result from the reaction of 2-alkynylaryldiazonium tetrafluoroborate with sulfur dioxide is described. In the presence of morpholin-4-amine, this transformation catalyzed by copper(i) bromide proceeds through insertion of sulfur dioxide and
Facile oxidation of electron-poor benzo[b]thiophenes to the corresponding sulfones with an aqueous solution of H2O2 and P 2O5
Antonow, Dyeison,Marrafa, Teresa,Dawood, Irfaan,Ahmed, Tauheed,Haque, Mohammad R.,Thurston, David E.,Zinzalla, Giovanna
supporting information; experimental part, p. 2289 - 2291 (2010/07/08)
A facile oxidation for the clean conversion of benzo[b]thiophenes to their corresponding sulfones is described employing an aqueous solution of H 2O2 and P2O5; the solution can be prepared and stored on a multi-
