Pyridyl based ruthenium(II) catalyst precursors and their dihydride analogues as the catalytically active species for the transfer hydrogenation of ketones

Reduced graphene oxide/iron oxide hybrid composite material as an efficient magnetically separable heterogeneous catalyst for transfer hydrogenation of ketones

“…[18] Commonly used hydrogen donors are formic acid, aqueous sodium formate, azeotropic mixtures of formic acid/triethylamine and 2-propanol, [19] but 2-propanol is mostly used as hydrogen donor because it is inexpensive, safe, non-toxic and environment friendly. [20] Generally, in academic and industrial operations, noble, precious and highly toxic metals such as Pd, [21] Rh, [22,23] Ru [17,[24][25][26][27][28][29] and Ir [30] are typically used for transfer hydrogenation reactions. Therefore, in recent years, transfer hydrogenation reactions using abundant and environmentally benign metals such as Fe, Co, Ni, etc., replacing the precious and highly toxic metals are gaining much attention.…”

Sterically demanding pyridine-quinoline anchoring ligands as building blocks for copper(i)-based dye-sensitized solar cell (DSSC) complexes

“…In this respect, stereochemical protection can be potentially offered by the benzo ring of the quinoline moiety, as was reported for [Cu( R DAB dipp ) (L COOMe )][PF 6 ] ( R DAB dipp = 1,4-diaza-1,3-butadienes, R = H, Me; dipp = 2,6-diisopropylphenyl; L COOMe = methyl-2-( pyridin-2-yl)quinoline-4-carboxylate) complexes, 27 and for the case of a number of ruthenium(II) complexes. 15,28,29 Accordingly, simple organic diimine ligand precursors, analogues of pqca, substituted with methyl at the 6′ (6′-Mepqca), the 8 (8-Mepqca), and both the 8 and 6′ positions (8,6′-Me 2 pqca) of the pyridyl ring and the quinoline moiety, constitute the basis of this work. The synthesis of the methyl ester analogues 6′-Mepqcame, 8-Mepqcame and 8,6′-Me 2 pqcame, where the H atom of the COOH group was replaced by Me, is also reported.…”

“…In this respect, stereochemical protection can be potentially offered by the benzo ring of the quinoline moiety, as was reported for [Cu( R DAB dipp )(L COOMe )][PF 6 ] ( R DAB dipp = 1,4-diaza-1,3-butadienes, R = H, Me; dipp = 2,6-diisopropylphenyl; L COOMe = methyl-2-(pyridin-2-yl)-quinoline-4-carboxylate) complexes, 27 and for the case of a number of ruthenium( ii ) complexes. 15,28,29…”

Πολυλειτουργικές Σύμπλοκες Ενώσεις Του Ρουθηνίου Με Δισχιδείς Και Τρισχιδείς Οργανικούς Υποκαταστάτες

“…φαίνεται να είναι πιο ελπιδοφόρα από τους άλλους δύο πρόδρομους καταλύτες που εξετάστηκαν διότι έχουν καλύτερες αποδόσεις μετατροπής στο ίδιο διάστημα. Η δυνατότητα επαναχρησιμοποίησης των καταλυτών στις διεργασίες «μεταφοράς υδρογόνου» ανοίγει ένα ενδιαφέρον νέο πεδίο μελέτης[74]. Τα καταλυτικά αποτελέσματα των υδριδικών συμπλόκων απουσία βάσης.…”