A nickelacycle as propionic acid equivalent for carbon-carbon coupling reactions; application to the synthesis of C25 steroid carboxylic acids

Organometallchemie binuclearer 1‐Azadien‐nickel(0)‐Komplexe Bimetallverbindungen mit NiFe‐Bindung durch Addition von Pentacarbonyleisen(0) und Nickelalactone durch Ringöffnung cyclischer Anhydride

“…'H-NMR ([D,]-DMF), 3,2 (m,. "C-NMR ([D7])DMF): 6 = 233,3 (CO), 167 6 = 8,35 (CH=N),7,9 (m,CsHs,CH=), 3,8 (m,CH2), (C=N),136,1,135,9,130,6 130,3,129,6,129,5,129,1,128,8,128,5,128,3,228,126,8 (C&,c = c ) ,58,3 (CHz). C4,H,,FeN4NiO7 (887,5);C 62,6 (ber.…”

Saturated and unsaturated nickelalactones with N-heterocyclic carbene ligands: Synthesis and structures

“…Nickelalactones (''nickelacyclic carboxylates'') are interesting organometallic building blocks for the organic synthesis of a variety of functionalized organic compounds [1][2][3][4][5][6] and for the self-organization to form nickelamacrocycles of different ring size [7]. Furthermore, they are discussed as possible intermediates in a hypothetic catalytic cycle to form acrylic acid from CO 2 and ethylene [8][9][10][11] and are suggested to be formed as intermediates in the catalytic formation of 2-pyrones from CO 2 and alkynes [12][13][14][15].…”

A new set of nickelacyclic carboxylates (“nickelalactones”) containing pyridine as supporting ligand: synthesis, structures and application in C–C– and C–S– linkage reactions

“…Furthermore, nickelacyclic carboxylates are also found to be useful reagents for the construction of functionalized steroid side chains [36][37][38]. Additionally, complexes with an olefin or allyl group in the organic ring system are considered to act as intermediate in catalytic reactions of unsaturated substrates with CO 2 [18,[27][28][29][30][31][32]34,[39][40][41].…”