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Dispensability of the [4Fe‐4S] Cluster in novel homologues of Adenine Glycosylase MutY

27-Nov-2015 | Carlos H. Trasviña‐Arenas, Laura Margarita Lopez‐Castillo, Eugenia Sanchez‐Sandoval, Luis G. Brieba, FEBS Journal, 2015

Abstract 7,8‐dihydro‐8‐deoxyguanine (8oG) is one of the most common oxidative lesions in DNA. DNA polymerases misincorporate an adenine across from this lesion. Thus, 8oG is a highly mutagenic lesion responsible for G:C→T:A transversions. MutY is an adenine glycosylase, part of the Base ...


Dysprosium‐ and Ytterbium‐Based Complexes Involving Tetrathiafulvalene Derivatives Functionalised with 2,2′‐Bipyridine or 2,6‐Di(pyrazol‐1‐yl)‐4‐pyridine

19-Nov-2015 | Min Feng, Saskia Speed, Fabrice Pointillart, Bertrand Lefeuvre, Boris Le Guennic, Stéphane Golhen, Olivier Cador, La ..., European Journal of Inorganic Chemistry, 2015

Abstract Two new tetrathiafulvalene‐based ligands {L1 = 4,5‐bis[2,6‐di(pyrazol‐1‐yl)‐4‐pyridylmethylthio]‐4′,5′‐bis(methylthio)tetrathiafulvene, L3 = 4‐(4′‐methyl‐2,2′‐bypiridin‐4‐ylmethylthio)‐5‐(2‐cyanoethylthio)‐4′,5′‐ethylenedithiotetrathiafulvene} have been elaborated and four new ...


Colorimetric Humidity and Solvent Recognition Based on a Cation-Exchange Clay Mineral Incorporating Nickel(II)–Chelate Complexes

19-Nov-2015 | Hitoshi Hosokawa; Tomoyuki Mochida, Langmuir, 2015

Solvatochromic nickel(II) complexes with diketonato and diamine ligands were incorporated into a saponite clay by ion exchange, and their colorimetric humidity- and solvent-recognition properties were investigated. These powders exhibit color change from red to blue-green depending on humidity, ...


Secondary Sphere Hydrogen Bonding in Monocopper Complexes of Potentially Dinucleating Bis(carboxamide) Ligands

18-Nov-2015 | Benjamin D. Neisen, Pavlo V. Solntsev, Mohammad R. Halvagar, William B. Tolman, European Journal of Inorganic Chemistry, 2015

Abstract Reaction of a macrocyclic ligand precursor comprising two bis(carboxamido)pyridine units (H4L4) connected by ethylene linkers with NMe4OH and CuX2 (X = Cl, OAc, or OTf) yielded monocopper complexes [NMe4][(H2L4)Cu(X)] [X = Cl (3), OAc (4), or OH (5)], in contrast to the results of ...


Chiroptical Probing of Lanthanide‐Directed Self‐Assembly Formation Using btp Ligands Formed in One‐Pot Diazo‐Transfer‐Deprotection‐'Click' Reaction from Chiral Amines

11-Nov-2015 | Thorfinnur Gunnlaugsson, Joseph P Byrne, Miguel Martínez-Calvo, Robert D Peacock, Chemistry - A European Journal, 2015

A series of enantiomeric btp‐containing ligands [2,6‐bis(1,2,3‐triazol‐4‐yl)pyridines] were synthesized via a one‐pot two‐step copper‐catalyzed amine‐alkyne 'click' reaction. The Eu(III) and Tb(III) directed self‐assembly formation of these ligands was studied in CH3CN by monitoring their ...


Diastereoselective Substrate-Controlled Transition-Metal-Catalyzed C–H Activation: An Old Solution to a Modern Synthetic Challenge

11-Nov-2015 | Joanna Wencel-Delord; Françoise Colobert, Synlett, 2015

SynlettDOI: 10.1055/s-0035-1560811 The synthesis of chiral compounds by means of asymmetric C–H activation is an appealing modern strategy for the straightforward conversion of simple and nonfunctionalized substrates into high-value-added stereogenic molecules. For several years, considerable ...


Isolation of a Tetranuclear Intermediate Complex in the Synthesis of Paddlewheel‐Type Dirhodium Tetraacetate

10-Nov-2015 | Yusuke Kataoka, Natsumi Yano, Tatsuya Kawamoto, Makoto Handa, European Journal of Inorganic Chemistry, 2015

Abstract To investigate the detailed mechanism of formation of the paddlewheel‐type dirhodium tetraacetate [Rh2(O2CCH3)4(L)2] ([1‐(L)2]; L = axial‐coordinated solvent ligand), we performed a step‐by‐step synthesis. The isolated red intermediate complex [Rh4(μ‐Cl)4(O2CCH3)4(L)4] ([2‐(L)4]) was ...


Diolefins with an ether/thioether functionality as ligands in the coordination sphere of Ni and Rh

10-Nov-2015 | Crispin Lichtenberg; Jan Bloch; Thomas L. Gianetti; Torsten Büttner; Jens Geier; Hansjörg Grützmacher, Dalton Transactions, 2015

A diolefin ether, trop2O (2), and a diolefin thioether, trop2S (3), have been investigated as ligand analogues of the well-established diolefin amine, trop2NH (1). Compounds 2 and 3 form different conformers in solution and in the solid state. Whereas 2 could be coordinated to Ni(0), 3 was found ...


Synthesis, Structures and Properties of Half‐Sandwich Nickel(II) Complexes with Backbone‐Modified NHC Ligands

09-Nov-2015 | Łukasz Banach, Piotr A. Guńka, Dominika Górska, Maja Podlewska, Janusz Zachara, Włodzimierz Buchowicz, European Journal of Inorganic Chemistry, 2015

Abstract A series of seven nickel complexes [Ni(η5‐C5H5)(X)(NHC)] (X = Cl or Br; NHC = N‐heterocyclic carbene) containing backbone‐modified NHC ligands was prepared by treatment of nickelocene with the corresponding NHC·HX salts or, in the case of complex 1h [Ni(η5‐C5H5)(Cl)(IMesO)] (IMesO = ...


Efficient Cp*Ir Catalysts with Imidazoline Ligands for CO2 Hydrogenation

09-Nov-2015 | Shaoan Xu, Naoya Onishi, Akihiro Tsurusaki, Yuichi Manaka, Wan‐Hui Wang, James T. Muckerman, Etsuko Fujita, Yuichiro ..., European Journal of Inorganic Chemistry, 2015

Abstract We report newly developed iridium catalysts with electron‐donating imidazoline moieties as ligands for the hydrogenation of CO2 to formate in aqueous solution. Interestingly, these new complexes promote CO2 hydrogenation much more effectively than their imidazole analogues and exhibit ...


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