Special Issue on Ruthenium Complexes

Ileana Dragutan, Valerian Dragutan, Albert Demonceau
2017 Molecules  
The organic chemistry of ruthenium has been one of the most vigorously growing research areas over the past decades. Considerable effort has been extended towards the design and application of a broad series of ruthenium complexes, which culminated with the development by Ryoji Noyori (2001 Nobel Prize for Chemistry) of chiral ruthenium catalysts for stereoselective hydrogenation reactions [1], and the discovery by Robert H. Grubbs (2005 Nobel Prize for Chemistry) of well-defined
more » ... ined ruthenium-benzylidene catalysts for olefin metathesis [2] . The aim of this special issue was to provide an overview of recent trends in ruthenium complex chemistry, hereby underlining its growing importance in the development of anticancer drugs and applications in catalysis, polymers, materials science, and nanotechnology [3] . The submitted contributions can be roughly grouped into four categories: (1) synthesis of new ruthenium complexes, (2) applications in organic synthesis and catalysis, (3) photocatalysis and dye-sensitized solar cells, and (4) medicinal chemistry. With the exception of the article of Igor T. Chizhevsky et al. [4] , which deals with the synthesis and characterization of new closo-ruthena-carborane complexes with a dioxygen ligand, most of the contributions actually fall into two or even three categories, so that the following summary of the special issue is by no means a strict classification. As one of these categories, organic synthesis and homogeneous catalysis have constituted for a long time a major field of application of ruthenium complexes. Along this line, Vincenzo Piccialli [5] reviews in this issue the chemistry of ruthenium tetroxide and perruthenate with a special emphasis on oxidation of alcohols and hydrocarbons, dihydroxylation of alkenes, oxidative cleavage of C-C double and triple bonds. New processes, synthetic applications, theoretical studies and unusual transformations mediated by these species are also covered in this review. The asymmetric transfer hydrogenation of imines catalyzed by the Noyori-Ikariya half-sandwich ruthenium complexes has been surveyed by Petr Kačer et al. [6] . Aspects highlighted in this review include the role of the N-arylsulfonyl moiety and that of the η 6 -coordinated arene of the catalytic systems, and also the effect of structural modifications on the imine substrate. The supremacy of ruthenium-benzylidene complexes in olefin metathesis is illustrated by a contribution of Hermanus C. M. Vosloo et al. [7], who synthesized new chelating pyridinyl-alcoholato ligands and incorporated them into the second-generation Grubbs catalyst. The influence of the ligand substituents on the thermal stability, activity, selectivity and lifetime of these complexes in the metathesis of 1-octene has been investigated. On the other hand, the development of recyclable catalysts is nowadays a major trend towards sustainable chemistry. In their excellent micro-review, Dong Wang and Didier Astruc [8] focused their attention on the fabrication of recoverable magnetic nanoparticle-supported ruthenium complexes and their catalytic applications in various organic syntheses. With many potential applications in photochemistry, ruthenium complexes have always been in the focus of synthetic organometallic chemists. A contribution to this category was made by
doi:10.3390/molecules22020255 pmid:28208737 fatcat:ea67tg4bfnh6zk6l3gabwxws7a