Rhenium-catalysed reactions in chemical synthesis: selected case studies

Abstract

This Perspective presents and discusses a selection of examples that reinforce the enabling and distinctive reactivity provided by homogeneous rhenium catalysis in chemical synthesis. Specifically, the ability for lower oxidation...

[AsCCAs]-Coordinated Rhenium Hydrides and Their Reactivities Toward Unsaturated Hydrocarbons, Heterocumulenes, and CO2

“…ReH 7 (PCy 3 ) 2 , for example, was shown to readily generate transient ReH 5 (PCy 3 ) 2 upon thermally induced H 2 elimination, while ReH 7 (PEt 2 Ph) 2 and ReH 7 (PMe 2 Ph) 2 were found to dimerize to Re 2 H 8 (PR 2 Ph) 4 (R = Et, Me), either thermally or photochemically . In view of the importance of these and related ligand-dependent reactivity patterns, , rhenium hydrides have been highlighted recently as “tunable players in tailored hydrogenation catalysis” …”

Synthesis, characterization, and structure determination of bis-oxazolidine complexes of rhenium

“…34,35 In an attempt to substitute the carbonyl ligands on 10, the complex was treated with TMANO in the presence of PPh 3 at 50 1C in THF over 17.5 h (see the ESI †). 1 H and COSY NMR spectra of the crude reaction mixture repeatedly showed starting 10 and free phosphine. X-ray diffraction analysis of solids crystallized from the reaction mixture also gave the structure of 10.…”

“…In recent decades, investigations of rhenium complexes and their applications to homogeneous catalysis have offered new approaches to an array of organic reactions. 1 A common subset of rhenium complexes are the rhenium tricarbonyls, which have demonstrated catalytic activity in several C-C and C-X (X = Si, N, O, S, Se) bond forming reactions, reductive processes, and photochemical transformations. 2 Recently, Re(I) tricarbonyl complexes supported by PNP or bipyridine (bpy) ligands were found to be catalytically active in the N-alkylation of anilines, 3 hydrogenation of carbonyl derivatives, 4 coupling of C 1 and C 2 alcohols, 5 and reduction of CO 2 [6][7][8] (Fig.…”