The Highly Efficient Suzuki-Miyaura Cross-Coupling of (Hetero)aryl Chlorides and (Hetero)arylboronic Acids Catalyzed by “Bulky-yet-Flexible” Palladium-PEPPSI Complexes in Air
作者:Jia-Sheng Ouyang、Yan-Fang Li、Fei-Dong Huang、Dong-Dong Lu、Feng-Shou Liu
DOI:10.1002/cctc.201701076
日期:2018.1.23
Pd–PEPPSI complexes were designed and synthesized. The relationship between catalyst structure and properties was systematically investigated. It was revealed that “bulky‐yet‐flexible” C3 bearing ancenaphthyl backbone was a highlyefficient precatalyst and could be successfully employed in Suzuki–Miyaura reactions of (hetero)arylchlorides with (hetero)arylboronic acids at a low palladium loading in the presence
Deprotonative Metalation of Substituted Benzenes and Heteroaromatics Using Amino/Alkyl Mixed Lithium-Zinc Combinations
作者:Katia Snégaroff、Shinsuke Komagawa、Floris Chevallier、Philippe C. Gros、Stéphane Golhen、Thierry Roisnel、Masanobu Uchiyama、Florence Mongin
DOI:10.1002/chem.201000543
日期:2010.7.19
Different homoleptic and heteroleptic lithium–zinccombinations were prepared, and structural elements obtained on the basis of NMR spectroscopic experiments and DFT calculations. In light of their ability to metalate anisole, pathways were proposed to justify the synergy observed for some mixtures. The best basic mixtures were obtained either by combining ZnCl2⋅TMEDA (TMEDA=N,N,N′,N′‐tetramethylethylenediamine)
Diarylpyrazine-based position isomers: A detailed study of optical properties and structure-property relationship
作者:Dong-Jin Park、Puttavva Meti、Young-Dae Gong
DOI:10.1016/j.dyepig.2020.108254
日期:2020.5
A versatile and expeditious synthetic route to pyrazine-based symmetric and asymmetricchromophores decorated with donor-acceptor (D-A) has been designed to study their structural effects on optical properties. Suzuki-Miyaura coupling of dihalopyrazine with various aryl boronic acids was synthesized under microwave condition. Pyrazine functionalized at C-2, C-5 and C-6 serve as acceptor to construct
Using Pd-catalyzed Stille cross-coupling reactions, we report here the synthesis of various mono- or bis(tri-n-butylstannyl)diazines which were reacted with various halogenated diazines to access to various polyaza heterocyclic derivatives.
In this regard, a fluorescentchemosensor, 1-benzyl-3,5-di(thiophen-2-yl)pyrazin-1-ium bromide (BTPyz), was synthesized and characterized via spectroscopic methods. The photophysical properties were investigated using absorption and emission spectral analysis. As a fluorescentchemosensor, BTPyz exhibited a selective response towards 2,4,6-trinitrophenol (TNP) with a detection limit of 11.6 nM and