Enantioselective Hydrogenation of β-Keto Esters using Chiral Diphosphine-Ruthenium Complexes: Optimization for Academic and Industrial Purposes and Synthetic Applications
作者:V. Ratovelomanana-Vidal、C. Girard、R. Touati、J. P. Tranchier、B. Ben Hassine、J. P. Genêt
DOI:10.1002/adsc.200390021
日期:2003.1
Enantioselectivehydrogenationusingchiralcomplexes between atropisomeric diphosphines and ruthenium is a powerful tool for producing chiral compounds. Using a simple and straightforward in situ catalyst preparation, the conditions were optimizedusing molecular hydrogen for both academic and industrialpurposes. This led to the best conditions and the lowest catalytic ratio required for the pressure
A General Method for the Synthesis of Both Enantiomers of Optically Pure β-Hydroxy Esters from (<i>S</i>)-(<i>p</i>-Chlorophenylsulfinyl)acetone Easily Obtainable by Kinetic Resolution with Bakers’ Yeast
作者:Tamotsu Fujisawa、Atsushi Fujimura、Toshio Sato
DOI:10.1246/bcsj.61.1273
日期:1988.4
enantiomers of various optically pure (R)- and (S)-β-hydroxy esters were generally synthesized from (S)-(p-chlorophenylsulfinyl)acetone obtained by kinetic resolution with bakers’ yeast, followed by γ-alkylation, diastereoselective reduction, subsequent introduction of ester group and reductive elimination of the sulfinyl group. The key step of the diastereoselective reduction of (S)-β-keto sulfoxides was performed
Absolute Configuration and Conformation of Two Fráter–Seebach Alkylation Reaction Products by Film VCD and ECD Spectroscopic Analyses
作者:Mohammad Reza Poopari、Zahra Dezhahang、Ke Shen、Lei Wang、Todd L. Lowary、Yunjie Xu
DOI:10.1021/jo502438a
日期:2015.1.2
Two chiroptical spectroscopic techniques, namely, electronic and vibrational circular dichroism (ECD and VCD), as well as NMR spectroscopy have been utilized to determine the absoluteconfigurations and geometries of two Fráter–Seebach alkylation reaction products with long hydrocarbon chains. The experimental studies have been complemented with density functional theory calculations. Strong characteristic