One-Pot Synthesis and Redox Properties of Conjugation-Extended 4,4′-Bipyridines and Related Compounds. New Ligands Consisting of a Heterocyclic Three-Ring Assembly
作者:Kazuko Takahashi、Takayasu Nihira
DOI:10.1246/bcsj.65.1855
日期:1992.7
heterocycles such as 2,5-di(4-pyridyl)thiophene 3, 2,5-di(4-pyridyl)furan 4, 2,5-di(4-pyridyl)thieno[3,2-b]thiophene 7, 1,4-di(4-pyridyl)benzene 6, 2,5-di(2-pyridyl)thiophene 8, and 2,5-di(3-pyridyl)thiophene 9 have been efficiently synthesized by a simple one-pot procedure through the palladium-mediated cross-coupling reaction between (trimethylstannyl)pyridines and dibromo-substituted heteroaromatics
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)
A halogen-bond templated 1:1 macrocyclization in solution is reported. Tetra(iodoperfluorophenyl) ethers were used as halogen-bonded exotemplates in a substoichiometric amount (5 mol %). Pyridine-containing macrocyclic architectures were formed by ruthenium-catalyzed tandem metathesis/transfer hydrogenation sequence using sodium borohydride and methanol as non-dihydrogen hydrogen source. The halogen-bonded
Synthesis and Characterization of 2,5-Bis(2-pyridyl)thiophene
作者:Samir A. Al-Taweel
DOI:10.1080/10426500211734
日期:2002.5.1
yl] pyridine ( 6 ) was prepared in 95% yield by reaction of 2-bromopyridine with trimethylsilylacetylene in triethylamine in the presence of bis(triphenylphosphine)Palladium(II) chloride and Copper(I) iodide. Desilylation of ( 6 ) by refluxing with sodium hydroxide in methanol (yield 95%) of 2-ethynylpyridine ( 5 ). Oxidativecoupling of ( 5 ) in pyridine by oxygen in the presence of Copper(I) chloride
作者:Austin K. Shigemoto、Carolyn N. Virca、Samuel J. Underwood、Lauren R. Shetterly、Theresa M. Mccormick
DOI:10.1080/00958972.2016.1164851
日期:2016.7.2
Abstract Coordinationchemistry of thiophene rings is poorly understood, despite their common use in organic electronic materials. The absorption and emission responses to transitionmetalions of three thiophene-based ligands containing pyridine chelating groups are examined. These ligands, 2-(2′-thienyl)-pyridine (L1), 2,5-bis(2-pyridyl)thiophene (L2), and 2,6-bis(2-thienyl)pyridine (L3), show a