191469-76-8Relevant academic research and scientific papers
Efficient synthesis of new asymmetric tripodal ligands using microwave irradiation, and their crystal structures
Yuan, Zeli,Yang, Xiaoqing,Wang, Lei,Huang, Jiandong,Wei, Gang
, p. 42211 - 42214 (2015/02/03)
An efficient method for the synthesis of asymmetric tripodal ligands from aryl aldehydes and (2-hydro-xybenzyl-2-pyri-dylmethyl)amine was developed. It has the advantages of short reaction times, high yields and a simple methodology. The title ligands were characterized using a combination of 1H NMR, 13C NMR, FT-IR and H RMS spectroscopies. The structures of some of the ligand were confirmed by single-crystal X-ray diffraction. This journal is
Functional models for enzyme-substrate adducts of catechol dioxygenase enzymes: The Lewis basicity of facially coordinating tridentate phenolate ligands tunes the rate of dioxygenation and product selectivity
Visvaganesan, Kusalendiran,Ramachitra, Somasundaram,Palaniandavar, Mallayan
experimental part, p. 87 - 94 (2012/02/03)
A few iron(III) 3,5-di-tert-butylcatecholate (DBC2-) adducts of the type [Fe(L)(DBC)(CH3OH)], where L is a tridentate substituted monophenolate ligand such as 2-((N-benzylpyrid-2-ylmethylamino)methyl)phenol (H(L1)), 2-((N-benzylpyrid-2-ylmethylamino)-methyl)-4,6-dimethylphenol (H(L2)), 2-((N-benzylpyrid-2-ylmethylamino)methyl)-4,6-di-tert-butylphenol (H(L3)) and 2-((N-benzylpyrid-2-ylmethylamino)methyl)-4-nitrophenol (H(L4)), have been isolated and characterized by elemental and ESI-MS analysis. The spectral and electrochemical properties and dioxygenase activities of the adducts have been studied in methanol solution. Upon varying the substituents on the phenolate ring from electron-releasing to electron-withdrawing, the redox potential of DBSQ/DBC2- couple is shifted to a more positive value indicating an increase in covalency of iron(III)-catecholate bonds. All the complexes elicit cleavage of DBC2- using molecular oxygen to afford both intra- (I) and extradiol (E) cleavage products with the product selectivity (E/I) varying in the range 0.3-1.9. Interestingly, the incorporation of electron-withdrawing substituents facilitates the regioselective extradiol cleavage of catechol while that of electron-releasing substituents facilitate the regioselective intradiol cleavage.
