Asymmetric addition of diethylzinc to aromatic aldehydes by chiral ferrocene-based catalysts

In the Arena of Enantioselective Synthesis, Titanium Complexes Wear the Laurel Wreath

“…The ligand 149 showed very disappointing behavior since only in the ethylation of benzaldehyde to yield alcohol 136b was the enantioselectivity excellent; for functionalized arenecarbaldehydes as well as α,β-unsaturated derivatives, the enantioselectivity was very low, even leading to racemic mixtures.…”

Synthesis of Ferrocenyl Schiff Bases Under Solvent-Free Conditions Using Microwave Irradiation

“…Since 1951, when Pauson and Miller isolated ferrocene, the interest in its derivatives and their properties has increased exponentially, mainly because of their application in a wide variety of areas, among which those concerning the use of ferrocene derivatives as catalysis [1,2] or in the design of new materials such as liquid crystals or polymers are especially important. [3] Schiff bases derived from ferrocene carbaldehyde 1 and their metal complexes are quite attractive.…”

Symmetrical 1,1′‐Bidentate Ferrocenyl Ligands

“…Kim and Jeong have prepared a new ferrocenyl-1,1 0 -disulfonamide L-12 using the same method developed by Knochel [34]. First, the chiral diols 14 were obtained from 38 in the presence of CBS-catalyst 37 with 93% yield.…”