Synthesis of 2,6-Diformyl-3-hydroxypyridine Bis[N-methyl-N-(2′-pyridyl) hydrazone]: A PentadentateN,N,N,N,NLigand for the Preparation of Chelating Resins
Recoverable polymer-bound homogeneous catalysts for catalytic chain transfer process
申请人:E. I. du Pont de Nemours and Company
公开号:US08030422B2
公开(公告)日:2011-10-04
Disclosed herein are novel polymer-tethered ligands, metal complexes comprising these ligands, and the use of these complexes as chain transfer catalysts to control the molecular weight of oligomeric and polymeric materials produced in a radical polymerization process. The materials made by the processes disclosed herein have significantly reduced color, making them suitable for a wide range of color-critical end-uses, including automotive coatings.
The new NNN type pyridine ligands were prepared by using low cost and readily available starting materials and metalated with RuCl2(PPh3)3 to obtain ruthenium(II) complexes. All structures were illuminated by NMR, HRMS, and FT-IR spectroscopy. The complexes exhibited good catalytic activity in transferhydrogen reaction of ketones and it was found that a hydroxyl group on β-position of the pyridine
Pyriporphyrinone: A New 18-π Aromatic Porphyrinoid
作者:Thomas Schönemeier、Eberhard Breitmaier
DOI:10.1055/s-1997-1178
日期:1997.3
A pyriphorphyrinone was synthesized by cyclocondensation of tripyrrane 2 with 2,6-diformyl-3-hydroxypyridine (1b). It was possible to identify 3b as the exclusively formed tautomer.
Synthesis and Characterization of <i>N</i>-Methylporphyrins, Heteroporphyrins, Carbaporphyrins, and Related Systems
作者:Alissa N. Latham、Timothy D. Lash
DOI:10.1021/acs.joc.0c01737
日期:2020.10.16
shifted UV–Vis absorptions compared to their core unsubstituted congeners. However, protonNMR spectroscopy demonstrated that these derivatives retained strong diamagnetic ring currents and the presence of the internal alkyl substituents had little effect on the global aromatic characteristics. Nevertheless, the UV–Vis spectra of N-methyl-oxybenzi- and N-methyl-oxypyriporphyrins were dramatically altered
Late transition metal complexes of oxypyriporphyrin and the platinum(II) complex of oxybenziporphyrin
作者:Komal Pokharel、Gregory M. Ferrence、Timothy D. Lash
DOI:10.1142/s1088424617500535
日期:2017.7
examples of palladium(II), platinum(II) and silver(II) oxypyriporphyrins have been synthesized. Conventional conditions failed to result in the formation of a platinum(II) complex, but moderate yields were obtained when oxypyriporphyrin was reacted with platinum(II) chloride in refluxing mixtures of DMF and acetic acid containing potassium acetate. The palladium(II) and platinum(II) derivatives were characterized
尽管氧卟啉是一种含有吡啶酮的类卟啉系统,具有与真正的卟啉等效的配位核心,但其配位化学的研究却很少。在这项研究中,已经合成了钯 (II)、铂 (II) 和银 (II) 氧卟啉的第一个例子。常规条件不能导致铂 (II) 配合物的形成,但当氧卟啉与氯化铂 (II) 在含有乙酸钾的 DMF 和乙酸的回流混合物中反应时,获得了适中的产率。钯 (II) 和铂 (II) 衍生物通过 X 射线晶体学进行表征。结构类似的类碳卟啉系统氧苯并卟啉也显示在相同条件下与氯化铂 (II) 反应生成铂 (II) 羟基苯并卟啉络合物。与氧苯并卟啉不同,这种复合物仅具有弱的变性。在碱的存在下,变质特性被重新断言以提供芳族阴离子物质。