منابع مشابه
Stereochemistry and catalysis with zirconium complexes
Monoand bis(q-cyclopentadieny1)zirconium complexes show interesting stereochemical features with regard to their use in organometallic and organic synthesis as well as in catalysis. An example is described where the zirconocene unit serves to stabilize a planar tetracoordinate carbon center. Next, various building blocks (a metal carbonyl, an organic carbonyl compound, a conjugated diene, plus ...
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Calcium complexes bearing bis(oxazolinylphenyl)amine (BOPA) ligands have been prepared, and their redistribution chemistry studied. The complexes [Ca(R-BOPA){N(SiMe(3))(2)}(THF)] (R = (i)Pr 1a, Ph 1b and Bn 1c) are active in hydroamination catalysis and give the highest enantioselectivity reported for a calcium complex.
متن کاملChiral poly-rare earth metal complexes in asymmetric catalysis
Asymmetric catalysis is a powerful component of modern synthetic organic chemistry. To further broaden the scope and utility of asymmetric catalysis, new basic concepts for the design of asymmetric catalysts are crucial. Because most chemical reactions involve bond-formation between two substrates or moieties, high enantioselectivity and catalyst activity should be realized if an asymmetric cat...
متن کاملSingle-site catalysis by bimetallic zinc calixarene inclusion complexes.
[reaction: see text] Bimetallic alkylzinc calixarene inclusion complexes were prepared and used in the ring-opening polymerization of L-lactide. Polymers with high molecular weight and a low degree of polydispersity were obtained. 1H NMR and diffusion NMR experiments suggest that a single-site mechanism is operative.
متن کاملCatalysis of protein folding by symmetric chaperone complexes.
The GroE chaperones of Escherichia coli assist protein folding under physiological and heat shock conditions in an ATP-dependent way. Although a number of details of assisted folding have been elucidated, the molecular mechanism of the GroE cycle remains unresolved. Here we present an experimental system that allows the direct analysis of the GroE-mediated folding cycle under stringent conditio...
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ژورنال
عنوان ژورنال: Coordination Chemistry Reviews
سال: 2015
ISSN: 0010-8545
DOI: 10.1016/j.ccr.2014.12.019