Rhodium-diphosphine catalysts for the hydroformylation of styrene: the influence of the excess of ligand and the chelate ring size on the reaction selectivity

Ctr-1 Mets7 motif inspiring new peptide ligands for Cu(i)-catalyzed asymmetric Henry reactions under green conditions

“…As reported in Table 3, only the catalytic complex with the monocoordinating peptide A, resulted inactive or less active as catalyst (entries 4-6). In all the other cases, the reaction was found effective especially using Mets7 and S1 complexes (entries 1,2,16,17). In the case of Mets7 complex the yield was up to 90% within 12 h (entry 2).…”

“…[8][9][10] Metal transporters are proteins 11,12 devoted to the trafficking of ions across the membranes and contain peptide domains able to bind metal ions. [13][14][15][16][17][18] A powerful approach to design hybrid metalpeptide catalysts could thus take advantage of the modulation of their binding activity. The native amino acid sequence of the binding domains could be optimized by inserting appropriate functional amino acids.…”

Improving regioselectivity in the rhodium catalyzed hydroformylation of protoporphyrin-IX and chlorophyll a derivatives

“…[18,19] It is described that phosphines with large bite angle (120 • ) favour the terminal hydroformylation, so Xantphos and 2,2 -bis-[(diphenylphosphino)methyl]-1,1 -biphenyl (Bisbi) are now phosphines of choice to favour the formation of linear aldehydes [20].…”

<strong>SYNTHESIS OF NEW CHIRAL DIPHOSPHINES LIGANDS PINENE DERIVATIVES AND THEIR APPLICATION IN ENANTIOSELECTIVE REACTIONS</strong>

“…These complexes catalyze the hydroformylation reaction (Scheme 2.). [4,5] Metal complexes with chiral bisphosphine ligands can catalyze also asymmetric reactions. On these reactions bisphosphine ligands form with a metal chelating rings, which flexibility affects asymmetric reactions.…”