Category: benzodioxans. Recently I am researching about ASYMMETRIC TRANSFER HYDROGENATION; HETEROGENEOUS CATALYSTS; PALLADIUM-CHITOSAN; CHIRAL LIGANDS; COMPLEXES; ALCOHOLS; WATER; DERIVATIVES; IRIDIUM; CHITIN, Saw an article supported by the Hungarian National Science Foundation through OTKA GrantOrszagos Tudomanyos Kutatasi Alapprogramok (OTKA) [K 109278]; Ministry of Human Capacities, Hungary [20391-3/2018/ FEKUSTRAT]. Published in WILEY-V C H VERLAG GMBH in WEINHEIM ,Authors: Szollosi, G; Kolcsar, VJ. The CAS is 100-19-6. Through research, I have a further understanding and discovery of 1-(4-Nitrophenyl)ethanone
Unprecedentedly high enantioselectivities are obtained in the transfer hydrogenation of prochiral ketones catalyzed by a Ru complex formed insitu with chitosan chiral ligand. This biocompatible, biodegradable chiral polymer obtained from the natural chitin afforded good, up to 86% enantioselectivities, in the aqueous-phase transfer hydrogenation of acetophenone derivatives using HCOONa as hydrogen donor. Cyclic ketones were transformed in even higher, over 90%, enantioselectivities, whereas further increase, up to 97%, was obtained in the transfer hydrogenations of heterocyclic ketones. The chiral catalyst precursor prepared ex situ was examined by scanning electron microscopy, FT-mid- and -far-IR spectroscopy. The structure of the insitu formed catalyst was investigated by H-1 NMR spectroscopy and using various chitosan derivatives. It was shown that a Ru pre-catalyst is formed by coordination of the biopolymer to the metal by amino groups. This precursor is transformed in water insoluble Ru-hydride complex following hydrogen donor addition. The practical value of the developed method was verified by preparing over twenty chiral alcohols in good yields and optical purities. The catalyst was applied for obtaining optically pure chiral alcohols at gram scale following a single crystallization.
Category: benzodioxans. About 1-(4-Nitrophenyl)ethanone, If you have any questions, you can contact Szollosi, G; Kolcsar, VJ or concate me.
Reference:
Benzodioxan,
,1,4-Benzodioxane | C8H8O2 – PubChem