TY  - CONF
N1  - Bibliogr.: 452. p. ; ill. ; összefoglalás angol nyelven
EP  - 452
SP  - 450
SN  - 978-963-306-563-1
A1  -  Kolcsár Vanessza Judit
A1  -  Sz?ll?si György
Y1  - 2017///
AV  - public
ID  - acta56247
T2  - International Symposium on Analytical and Environmental Problems (23.) (2017) (Szeged)
N2  - We have studied the use of an in situ prepared Ru-chitosan complex in the transfer hydrogenation of prochiral ketones. Reaction of acetophenone and its substituted derivatives resulted in good enantioselectivities in aqueous solvent mixture. To our delight in the reduction of several cyclic ketones over 90% enantiomeric excesses were obtained, reaching up to 97% in the transfer hydrogenation of heterocyclic 4-chromanone or 4-thiochromanone derivatives. The pre-prepared Ru-chitosan complex provided identical results even after several months? storage without special precautions. The complex prepared from a natural, inexpensive, readily available chiral ligand is a convenient alternative of the synthetic ligands, and may be applied in environmentally friendly and sustainable processes for preparing optically pure chiral alcohols.
UR  - http://acta.bibl.u-szeged.hu/56247/
KW  - Katalízis - környezetkémia
KW  -  Fotokatalízis
KW  -  Szerves kémia
TI  - Environmentally bening catalysis : chitosan, a natural ligand for highly enantioselective RU catalyzed transfer hydrogenation of ketones
VL  - 23
ER  -