Mixed-ligand schiff base cobalt(III) complexes with phenolaldehydes or phenolketones as ligands

Bridged (β-alkoxyalkyl)CoIII(salen) complexes by intramolecular alkoxycobaltation of unactivated alkenes: new models for coenzyme B12

“…Methyl N-benzylideneglycinate, 34 allyl ethyl carbonate, 35 ethyl 2-methylprop-2-enyl carbonate, 35 4-bromo-2-methylbut-2ene, 36 4-bromobutene, 37 and (MeO)Co(salen) 18b were prepared according to published procedures.…”

Controlling helical chirality of cobalt complexes by chirality transfer from vicinal diamines

“…We prepared a salen-type ligand 3 by replacing an aldimine with a ketimine of 2,2 0 -dihydroxybenzophenone (1) 9 because the ketimine structure is known to favor the formation of cis-b-Co III complexes. 10 A new N 2 O 2 salen-type ligand (3) was prepared as illustrated in Scheme 2. When ethylenediamine was mixed with 2,2 0 -dihydroxybenzophenone (1) at 60 1C, 1 : 1 imine compound 2 was formed and precipitated out of a MeOH solution (85% yield).…”