stimuli‐responsive chemical sensors. We designed a polysulfurated arene system based on a tetra(phenylthio)pyrene core decorated with four carboxylic acid units. Three different regioisomers, ortho , meta and para were studied in organic and aqueous solution. These systems are soluble in water at pH≥8 due to the deprotonation of carboxylic acids. The addition of metal ions cannot only quench the fluorescence
Hexakis(phenylthio)benzene compounds carrying six carboxylic acid groups at their periphery combine aggregation-induced phosphorescence, water-solubility and metal-binding properties: the para-isomer is a selective and sensitive turn-on phosphorescent sensor of Pb2+ ions in water.
Synthesis of Chiral Sulfoxides via Pd(II)-Catalyzed Enantioselective C–H Alkynylation/Kinetic Resolution of 2-(Arylsulfinyl)pyridines
作者:Tao Zhou、Meng-Xue Jiang、Pu-Fan Qian、Qi-Jun Yao、Xue-Tao Xu、Kun Zhang、Bing-Feng Shi
DOI:10.1021/acs.orglett.1c02918
日期:2021.10.15
A Pd(II)-catalyzed enantioselective C–H alkynylation of 2-(arylsulfinyl)pyridines via kinetic resolution using cheap and commercially available l-pGlu-OH as a chiral ligand is reported. A wide range of 2-(arylsulfinyl)pyridines were compatible with this protocol, giving the alkynylation products and recovered sulfoxides in high yields with high enantioselectivities (up to 99% ee). Furthermore, the
and wide scope in aromatic and heteroaromatic chemistry are presented. Exchange of sulfur components surrounding arenes and heteroarenes may occur at 25 °C, in a process that one may call a “sulfur dance”. A dynamic covalent system involving four components illustrates the thermodynamically-driven formation of a thiacalix[2]arene[2]pyrimidine. This work stimulates the implementation of reversible SNAr
鉴于一类可逆亲核芳香族取代反应在芳香族和杂芳族化学中的重要性和广泛范围,提出了它们的特征。芳烃和杂芳烃周围的硫成分交换可能在 25 °C 时发生,这一过程可以称为“硫舞”。涉及四个组分的动态共价系统说明了噻卡利克斯[2]芳烃[2]嘧啶的热力学驱动形成。这项工作刺激了可逆 SNAr 反应在有机、材料和共价动态化学中的实施。