Herein an efficient Pd-catalyzed asymmetricallylicsubstitution cascade of both (E)- and (Z)-but-2-ene-1,4-diyl dimethyl dicarbonates with α-substituted cyano ketones is described for the preparation of chiral 2,3-dihydrofurans in up to 97% yield with 98% ee. A suggested steric control process has been proposed to illustrate the differences in enantioselectivity between the reactions of (E)- and (Z)-allyl
Process for reducing 3-heteroaryl-3-oxopropionic acid derivatives
申请人:——
公开号:US20030225274A1
公开(公告)日:2003-12-04
The present invention relates to a process for preparing stereoisomerically enriched 3-heteroaryl-3-hydroxycarboxylic esters by reducing 3-heteroaryl-3-oxocarboxylic esters in the presence of ruthenium-containing catalysts.
Preparation of N-unsubstituted β-ketoamides by Rhodococcus rhodochrous-catalysed hydration of β-ketonitriles
作者:Vicente Gotor、Ramón Liz、Ana Mª Testera
DOI:10.1016/j.tet.2003.10.096
日期:2004.1
N-unsubstituted β-ketoamides, hardly obtainable or non-accessible by non-enzymatic methods, have been synthesized, with good to excellent yields, by the generally fast hydration of the corresponding β-ketonitriles, catalysed by the bacterium Rhodococcus rhodochrous IFO 15564. This bacterium shows nitrile hydratase and amidase activities, the latter being inhibited during its growth phase with diethyl phosphoramidate
Process for preparing 3-heteroaryl-3-hydroxypropanoic acid derivatives
申请人:——
公开号:US20040181058A1
公开(公告)日:2004-09-16
The invention relates to a process for preparing enantiomer-enriched 3-heteroaryl-3-hydroxypropanoic acid derivatives and 3-heteroaryl-1-aminopropan-3-ols, and to their use.
The present invention concerns compounds of following general formula (I): (Formula I) and their pharmaceutically acceptable salts, their method of preparation and their uses, notably as anticancer agent.