Nickel-Catalyzed Enantioselective Pyridone C-H Functionalizations Enabled by a Bulky N-Heterocyclic Carbene Ligand
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The synthesis of disubstituted chiral diene ligands (3aR,6aR)- and (3aS,6aS)-I (R1 = Ph, PhCH2) with a pentalene backbone from the corresponding bicyclo[3.3.0]octa-1,4-diones II is described. The compds. II were in turn accessible by enzymic resoln. of the ...
The cyanobacterial metabolite anachelin, postulated to serve as a biological ligand to Fe (siderophore), is composed of a fascinating blend of polyketide, peptide, and alkaloid building blocks. In particular, the latter consists of a N,N-dimethyltetrahydro ...
The ruthenium(II) hexaaqua complex [Ru(H2O)6]2+ reacts with dihydrogen under pressure to give the h2-dihydrogen ruthenium(II) pentaaqua complex [Ru(H2)(H2O)5]2+.The complex was characterized by 1H, 2H and 17O NMR: d H = -7.65 ppm, J HD = 31.2 Hz, d O = -80 ...
Technetium is an artificial element and its isotope 99mTc is now used for several years as radio-imaging agent. Much research effort is directed towards enhanced targeting of the imaging agents in order to improve accuracy of the diagnosis and reduce the r ...
Homo- and heterobimetallic complexes of the late transitions metals have been synthesized by metathesis reactions of the corresponding chloro-bridged dimers. These reactions have the advantage of being fast and giving rise to structurally defined products ...
The application describes ligands for binding targets, the ligands preferably including peptides having at least one sulfated or sulfonated amino acid. The ligand preferably specifically binds to heparin binding sites of biomolecules. Compositions, systems ...
The present invention relates to organometallic compounds useful in the treatment of metastasis. The organometallic compounds comprise a ligand that is convalently bound to a bioactive compound, which is an inhibitor of a resistance pathway or a derivative ...
A new polydentate tripodal ligand T2soxMe was synthesized to take advantage of the chelating effect of tridentate 8- hydroxyquinolinate subunits. Potentiometric and spectrophotometric titrations reveal seven pKa values of between 3.7 and 10.2. In water, th ...
A combined d. functional theory/continuum electrostatics approach was used to est. the pKa values of metal-based compds. and their hydrolysis products. Specifically, the protonation states and abs. pKa values of [M(h6-arene)(X)(Y)(pta)]n+ (M = Ru or Os; ar ...
Conversion of unactivated olefins to azides was achieved with high Markovnikov selectivity for a broad range of alkenes by using 6 mol % Co(BF4).6H2O and ligand I, with 3 equiv of tosyl azide as the nitrogen source and simple silanes (e.g., PhSiH3, tetrame ...