Nickelalactone als Synthesebausteine: Sonochemische und Bimetallaktivierung der Kreuzkopplungsreaktion mit Alkyl-halogeniden

Nickelacyclic Carboxylates with Pyridine‐Based Ligand Sets – From Mononuclear Complexes to Supramolecular Architectures by Hydrogen Bonding

“…[8,9] Some of those complexes are valuable starting compounds in organic synthesis, for example for the preparation of carboxylic acids or their derivatives. [10][11][12] Furthermore, some nickelacycles can be used as precursors for oligo-nuclear coordination compounds of nickel. [13] We recently reported the preparation of pyridine-stabilized nickelacyclic carboxylates, which proved to be useful starting compounds for ligand-exchange reactions.…”

“…[4] Particularly interesting is their preparation by oxidative coupling of CO 2 and simple alkenes at the nickel centre, [5][6][7] which can be considered as the initial step of so far not realized catalytic reactions using CO 2 as a C1 building block. [8,9] Some of those complexes are valuable starting compounds in organic synthesis, for example for the preparation of carboxylic acids or their derivatives.…”

“…Saturated nickelacyclic carboxylates are a well-known group of compounds which have been synthesized by different synthetic approaches, [1][2][3] among them the oxidative addition of cyclic anhydrides to zero-valent nickel compounds followed by decarbonylation as developed by Uhlig and co-workers. [4] Particularly interesting is their preparation by oxidative coupling of CO 2 and simple alkenes at the nickel centre, [5][6][7] which can be considered as the initial step of so far not realized catalytic reactions using CO 2 as a C1 building block.…”

Dppm stabilized nickelacyclic carboxylates as building blocks of oligonuclear nickel complexes

“…Nickelacyclic carboxylates are a well-known group of compounds which have been synthesized by different synthetic approaches [1][2][3][4]. Their preparation by oxidative coupling of CO 2 and unsaturated hydrocarbons at the nickel centre [5-9], which can be considered as the initial step of catalytic reactions using CO 2 as C1 building block, is especially interesting [10][11][12][13].…”

“…In presence of NiBr 2 , the related trinuclear complex [(l 2 -dppm){Ni(C 2 H 4 COO)} 2 Ã NiOH(H 2 O)(py) 2 ] + Br À (2) was isolated and characterized by elemental analysis, IR measurements and X-ray single crystal structural analysis. These compounds are rare examples of organonickel compounds with l 3 -hydroxide ligands and to best of our knowledge the first nickelacyclic carboxylates stabilized by such simple inorganic compounds as ligands.Ó 2010 Elsevier B.V. All rights reserved.Nickelacyclic carboxylates are a well-known group of compounds which have been synthesized by different synthetic approaches [1][2][3][4]. Their preparation by oxidative coupling of CO 2 and unsaturated hydrocarbons at the nickel centre [5-9], which can be considered as the initial step of catalytic reactions using CO 2 as C1 building block, is especially interesting [10][11][12][13].…”