Method for homogeneous enantioselective hydrogenation using catalytic ferrocenyl bis-phosphine complexes
申请人:Degussa-Huls AG
公开号:US06348620B1
公开(公告)日:2002-02-19
The present invention is relative to a method for the homogeneous, catalytic, enantioselective hydrogenation of compounds of the general formula (I)
with the aid of compounds of the general formula (II)
The use of the hydrogenated derivatives in organic synthesis.
Asymmetric ketone reduction by a hyperthermophilic alcohol dehydrogenase. The substrate specificity, enantioselectivity and tolerance of organic solvents
作者:Dunming Zhu、Hiba T. Malik、Ling Hua
DOI:10.1016/j.tetasy.2006.10.042
日期:2006.11
asymmetric ketone reduction, the substrate specificity and enantioselectivity of an alcohol dehydrogenase from the hyperthermophilic archaeon Pyrococcus furiosus have been evaluated. This hyperthermophilic alcohol dehydrogenase catalyzes the reduction of various ketones including aryl ketones, α- and β-ketoesters. Interestingly, aryl ketones, phenyl-substituted α- and β-ketoesters were reduced to the
Highly Enantioselective Hydrogenation of α-Keto Esters Catalyzed by Ru-Tunephos Complexes
作者:Xumu Zhang、Chun-Jiang Wang、Xianfeng Sun
DOI:10.1055/s-2006-932461
日期:——
Various enantiomerically pure α-hydroxy esters were synthesized by asymmetric hydrogenation of α-keto esters catalyzed by Ru-C n -Tunephos complex. Up to 97.1% ee has been achieved for both α-aryl and α-alkyl substituted α-keto esters.
通过由Ru-C n -Tunephos 配合物催化的α-酮酯的不对称氢化合成了各种对映体纯α-羟基酯。α-芳基和 α-烷基取代的 α-酮酯的 ee 高达 97.1%。
Chiral synthesis via organoboranes. 15. Selective reductions. 42. Asymmetric reduction of representative prochiral ketones with potassium 9-O-(1,2:5,6-di-O-isopropylidene-.alpha.-D-glucofuranosyl)-9-boratabicyclo[3.3.1]nonane
作者:Herbert C. Brown、Byung Tae Cho、Won Suh Park
DOI:10.1021/jo00241a021
日期:1988.3
N-heterocyclic bicyclic lactone compounds
申请人:——
公开号:US20040087569A1
公开(公告)日:2004-05-06
Novel N-heterocyclic bicyclic lactone compounds of formula I and its novel hydroxyamide precursors of formula IV,
1
are synthesized by coupling a hydroxy acid of formula II with an ester of formula III or a pharmaceutically acceptable salt thereof,
2
in the presence of a peptide coupling reagent to produce a hydroxyamide of formula IV, and cyclizing the hydroxyamide of formula IV to produce compounds of formula 1.