Química Inorgànica i Orgànica: Enviaments recents
Ara mostrant els elements 641-660 de 1012
Versatile methodology to hydrate alkynes, in the presence of a wide variety of functional groups, with Mercury(II) p-Toluensulfonamidate, under catalytic, mild and neutral conditions
A method to generate carbonylic compounds from alkynes under mild and neutral conditions, with excellent functional group compatibility and high yields, is described. Hydration takes place under catalytic conditions by ...
Structuring chemical space: similarity-based characterization of the PubChem Database
The ensemble of conceivable molecules is referred to as the Chemical Space. In this article we describe a hierarchical version of the Affinity Propagation (AP) clustering algorithm and apply it to analyze the LINGO‐based ...
Protein oligomers studied by solid-state NMR the case of the full-length nucleoid-associated protein histone-like nucleoid structuring protein
Members of the histone-like nucleoid structuring protein (H-NS) family play roles both as architectural proteins and as modulators of gene expression in Gram-negative bacteria. The H-NS protein participates in modulatory ...
Comparing and taming the reactivity of HWE and Wittig reagents with cyclic hemiacetals
A practical solution to the formation of mixtures of E/Z and open/cyclic isomers in the reaction of (2R,4S)-4-hydroxy-2-methylpentanal (as its hemiacetal, a lactol) with conjugated phosphoranes (stabilised Wittig reagents) ...
Synthesis of Janus compounds for the recognition of G-U mismatched nucleobase pairs
The design and synthesis of two Janus-type heterocycles with the capacity to simultaneously recognize guanine and uracyl in G-U mismatched pairs through complementary hydrogen bond pairing is described. Both compounds were ...
New series of mononuclear β-diketonate cerium(iii) field induced single-molecule magnets
Five new β-diketonate Ce3+ mononuclear complexes, [Ce(Btfa)3(H2O)2] (1), [Ce(Btfa)3(phen)] (2), [Ce (Btfa)3(bipy)] (3), [Ce(Btfa)3(terpy)] (4) and [Ce(Btfa)3(bathophen)(DMF)] (5), where Btfa− = 4,4,4-trifluoro-1- pheny ...
Synthesis, coordination study, and catalytic Pauson−Khand reactions of QuinoxP*(CO)4‑μ-alkyne dicobalt complexes
The coordination of the P-stereogenic and sterically demanding bisphosphine QuinoxP* to μ-alkyne dicobalt hexacarbonyl complexes was studied experimentally and computationally. Whereas the coordination occurred exclusively ...
Synthesis, crystal structures and properties of cis- and trans-isomers of [Pt{C6H4-4R1-1-[C8H4N-30-NOMe]}Cl2(dmso)] (R1 = H or Cl)
The study of the reactivity of the 3-methoxyimino-2-phenyl-3H-indoles C6H4-4R1-1-[C8H4N-30-NOMe] [R1 = Cl (1a) or H (1b)] with cis-[PtCl2(dmso)2] has allowed the isolation of trans-[Pt{C6H4-4R1-1- [C8H4N-30-NOMe]}Cl2(dmso)] ...
Triangular nickel complexes derived of 2-pyridylcyanoxime : an approach to the magnetic properties of the {Ni3(µ3-OH)(pyC{R}NO)3}2+ core
<p>A series of nickel complexes with nuclearity ranging from Ni3 to Ni6 have been obtained by treatment of a variety of nickel salts with the 2-pyridylcyanoxime ligand. The reported compounds have as a common structural ...
Platinum (II) and palladium (II) complexes with (N,N') and (C,N,N') ligands derived from pyrazole as anticancer and antimalarial agents: synthesis, characterization and in vitro activities
The study of the reactivity of three 1-(2-dimethylaminoethyl)-1H-pyrazole derivatives of general formula [1-(CH2)2NMe2}-3,5-R2-pzol] {where pzol represents pyrazole and Rdouble bond; length as m-dashH (1a), Me (1b) or Ph ...
Platinum(II) and palladium(II) complexes derived from 1-ferrocenylmethyl-3,5-diphenylpyrazole. Coordination, cyclometallation or transannulation?
The synthesis and characterization of the novel pyrazole derivative [1-(Fc-CH2)-3,5-Ph-2-(C3HN2)] (2) {Fc = (eta(5) -C5H5)Fe(eta(5)-C5H4)-} with a ferrocenylmethyl substituent on position 1 of the heterocycle is described. ...
Kinetico-mechanistic studies on intramolecular C-X bond activation (X = Br, Cl) of amino-imino ligands on Pt(II) compounds. Prevalence of a concerted mechanism in nonpolar, polar and ionic liquid media
The C–Br and C–Cl oxidative addition reactions of molecules containing a set of {N-amino,N-imino} chelating donor groups (2-X,6-YC6H4CHNCH2CH2NMe2, X = Br, Cl; Y = Cl, H) attached to a {PtII(Ar)2} (Ar = Ph, 4-MeC6H4) have ...
Reductive Elimination from Cyclometalated Platinum(IV) Complexes To Form Csp2−Csp3 Bonds and Subsequent Competition between Csp2−H and Csp3−H Bond Activation
<p>Reductive elimination reactions of the cyclometalated platinum(IV) compounds [PtMe2Br{C6H4CH NCH2(4-ClC6H4)}L] (L = SMe2, PPh3) to form Csp3−Csp2 bonds, followed by either exclusive Csp2−H bond activation (L = SMe2) ...
A New Cyclometalation Motif: Synthesis, Characterization, Structures, and Reactivity of Pallada- and Platinacycles with a Bidentate {C(sp2,cyrhetrene),N}− Ligand
The synthesis, characterization, X-ray crystal structure, and study of the reactivity of the novel cyretrenyl ligand [{(η5-C5H4-2-C5H4N)}Re(CO)3 (1) with Pd(OAc)2 or [MCl2(DMSO)2] (M = Pd, Pt) are reported. These studies ...
Synthesis and characterization of CoIII3 inverse metallacrowns via use of 6-methyl-2-pyridylaldoxime
The use of 6-methyl-2-pyridylaldoxime (6-mepaoH) in cobalt carboxylate chemistry has yielded metallacrowns with general formula [CoIII3(μ3-O)(O2CMe)3(6-mepao)3]2[CoII(L)4] (1⋅2MeOH⋅1.5H2O, L=AcO−and 2⋅2.5H2O, L=NCS−). ...
Boosting self-assembly diversity in the solid-state by chiral/non-chiral ZnII-porphyrin crystallization
A chiral ZnII porphyrin derivative 1 and its achiral analogue 2 were studied in the solid state. Considering the rich molecular recognition of designed metalloporphyrins 1 and 2 and their tendency to crystallize, they were ...
Synthesis, RNAi activity and nuclease-resistant properties of apolar carbohydrates siRNA conjugates
Oligoribonucleotide conjugates carrying apolar carbohydrates at the 5′-end and the corresponding siRNA duplexes have been prepared using phosphoramidite chemistry. All the carbohydrate-siRNA derivatives were compatible ...
Sulfonamide linked ciprofloxacin derivatives as a novel class of inhibitors of jack bean urease. Synthesis of Kinetic mechanism and Bioinformatics
Sulfonamide derivatives serve as an important building blocks in the drug design discovery and development (4D) process. Ciprofloxacin-, sulfadiazine- and amantadine-based sulfonamides were synthesized as potent inhibitors ...
Self-assembled trityl radical capsules implications for dynamic nuclear polarization
A new class of guest-induced, bi-radical self-assembled organic capsules is reported. They are formed by the inclusion of a tetramethylammonium (TMA) cation between two monomers of the stable trityl radical OX63. OX63 is ...
TetrazolateazidocopperIJII) coordination polymers: tuned synthesis, structure, and magnetic properties
As the first example of using a parent tetrazole and an azide together in preparing magnetic complexes, two novel tetrazolate-azido-bridged Cu(ii) coordination polymers, [Cu(tz)(N3)]n (1) and [Cu(tz)(N3)(NH3)2]n (2) (tz = ...
