Three consecutive steps over the chirally modified Pt surface: asymmetric catalytic cascade reaction of 2-nitrophenylpyruvates
作者:György Szőllősi、Lenke Kovács、Zsolt Makra
DOI:10.1039/c4cy00883a
日期:——
The influence of the reaction conditions on the asymmetric heterogeneous cascade reaction of 2-nitrophenylpyruvates over Pt catalysts modified with cinchonidine leading to (R)-3-hydroxy-3,4-dihydroquinolin-2(1H)-one derivatives has been studied. Results of studies on the amount of aceticacid or catalyst, nature of the Pt support, kinetic examinations, effect of H2 pressure, and modifier and substrate
Preparation of Optically Enriched 3-Hydroxy-3,4-dihydroquinolin-2(1<i>H</i>)-ones by Heterogeneous Catalytic Cascade Reaction over Supported Platinum Catalyst
The development of a novel heterogeneous catalytic asymmetric cascade reaction for the synthesis of tetrahydroquinolines from 2‐nitrophenylpyruvates is reported. Optically enriched 3‐hydroxy‐3,4‐dihydroquinolin‐2(1H)‐ones are prepared by enantioselective hydrogenation of the activated keto group over a Cinchona alkaloid‐modified Pt catalyst, reduction of the nitro group and spontaneous cyclization