Synthetic Approach to N,N,N',N'-Tetrakis[(2-pyridylmethyl)ethylenediamine] (TPEN) Derivatives through Ruthenium-Catalyzed-[2+2+2]cycloaddition
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چکیده
منابع مشابه
Ruthenium Catalyzed Transfer Hydrogenation
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15 صفحه اولRuthenium-catalyzed transformation of alkenyl triflates to alkenyl halides.
In the presence of a ruthenium catalyst, alkenyl triflates were found to be transformed to the corresponding bromides, chlorides and iodides simply by treatment with a lithium halide (1.2 equiv.).
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Well defined, stable, one-point binding ruthenium complexes and selectively bind and activate alpha,beta-unsaturated carbonyl compounds for cycloaddition reactions. These mild Lewis acids catalyze asymmetric 1,4-addition reactions of aryl thiols to enones with product selectivities up to 87% ee. (31)P NMR experiments provide an insight into the intricate equilibria governing the reaction mechan...
متن کاملRuthenium-catalyzed ring-closing metathesis to form tetrasubstituted olefins.
[structure: see text]. Increased efficiency for ring-closing metathesis to form tetrasubstituted olefins using N-heterocyclic carbene ligated ruthenium catalysts was achieved by reducing the size of the substituents at the ortho positions of the N-bound aryl rings.
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ژورنال
عنوان ژورنال: HETEROCYCLES
سال: 2012
ISSN: 0385-5414
DOI: 10.3987/com-11-s(p)16