First Synthesis of Novel Aminophenyl Pyridinium-5-(hydroxybenzoyl)-hydrazonomethyl-2-oxothiazol-3-ide Derivatives and Evaluation of Their Anticancer Activities
Nickel-Catalyzed Amination of Aryl Chlorides with Amides
作者:Jinpeng Li、Changyu Huang、Daheng Wen、Qingshu Zheng、Bo Tu、Tao Tu
DOI:10.1021/acs.orglett.0c03836
日期:2021.2.5
nickel-catalyzed amination of aryl chlorides with diverse amides via C–N bond cleavage has been realized under mild conditions. A broad substrate scope with excellent functional group tolerance at a low catalyst loading makes the protocol powerful for synthesizing various aromatic amines. The aryl chlorides could selectively couple to the amino fragments rather than the carbonyl moieties of amides. Our protocol
development of novel luminescentiridium(III) complexes with highly tunable emission energy and versatile applications is of particular importance. In this Communication, a series of luminescentiridium(III) complexes supported by chromophoric pyridinium-derived N-heterocyclic carbene (NHC) ligands that display tunable emission from 516 to 682 nm were prepared. These complexes can be used as photocatalysts
Fluorescent molecular rotors as sensors for the detection of thymidine phosphorylase
作者:Manuela Petaccia、Luisa Giansanti、James N. Wilson、Heajin Lee、Sara Battista、Giovanna Mancini
DOI:10.1016/j.bmc.2020.115881
日期:2021.1
to detect and quantify them. The three molecularrotors developed as TP sensors differ in the length of the alkylic spacer joining the ligand unit, a thymine moiety, and the fluorescent molecularrotor, a [4-(1-dimethylamino)phenyl]-pyridinium bromide. Their ability to trigger an optical signal upon the interaction with thymidine phosphorylase was investigated by fluorescent measurements.
Cobalt-catalyzed cross-couplings of nitrogen-containing heterocyclic phosphonium salts with arylmagnesium halides proceeded efficiently with the aid of cobalt(II) catalyst and copper(I) salt in tetrahydrofuran at ambient temperature, producing the desired 4-arylated pyridine, quinoline, and quinoxaline in modest to good yields.
钴催化的含氮杂环鏻盐与芳基卤化镁的交叉偶联在钴 (II) 催化剂和铜 (I) 盐的帮助下在四氢呋喃中在环境温度下有效进行,产生所需的 4-芳基化吡啶、喹啉和喹喔啉产量适中至良好。
Cu/Fe-mediated <i>N</i>(sp<sup>2</sup>)-arylation/alkenylation of pyridines with aryl-/alkenylboronic acids to yield versatile cationic materials
作者:Yuzhou Wang、Yu Yu、Rongrong Xie、Ya-Nan Tian、Lingyu Huang、Shihai Lv、Xiaona Meng、Xiangfei Kong、Shiqing Li
DOI:10.1039/d1nj05240c
日期:——
catalytic system and an easy operation, is disclosed. A series of length-controllable linear (the number of aryls ranges from 2 to 6) and L-shaped pyridinium salts have been easily prepared by this N(sp2)-arylation and they show tunable fluorescence emission that is mainly tailored by the length of the N-aryl rather than C-aryl groups. Furthermore, direct N-alkenylation of sp2-nitrogen heterocycles is reported