A Modular Furanoside Thioether-Phosphite/Phosphinite/ Phosphine Ligand Library for Asymmetric Iridium-Catalyzed Hydrogenation of Minimally Functionalized Olefins: Scope and Limitations
作者:Mercedes Coll、Oscar Pàmies、Montserrat Diéguez
DOI:10.1002/adsc.201200711
日期:2013.1.14
thioether‐phosphite/phosphinite/phosphine ligand library has been synthesized for the iridium‐catalyzed asymmetric hydrogenation of minimallyfunctionalizedolefins. These ligands can be prepared efficiently from easily accessible D‐(+)‐xylose. We found that their effectiveness at transferring the chiral information in the product can be tuned by correctly choosing the ligand components. Enantioselectivities were
Thioether-phosphite: new ligands for the highly enantioselective Ir-catalyzed hydrogenation of minimally functionalized olefins
作者:Mercedes Coll、Oscar Pàmies、Montserrat Diéguez
DOI:10.1039/c1cc13300d
日期:——
We have described the first successful application of non-N-donor heterodonor ligands—thioether-phosphite ligands—in the Ir-catalyzed hydrogenation of minimally functionalized olefins. Excellent enantioselectivities (ee's up to 99%) have been obtained for a range of substrates, including challenging terminal disubstituted substrates, under standard conditions.
5' AND 2' BIS-SUBSTITUTED NUCLEOSIDES AND OLIGOMERIC COMPOUNDS PREPARED THEREFROM
申请人:Swayze Eric E.
公开号:US20110269821A1
公开(公告)日:2011-11-03
The present invention provides modified nucleosides and oligomeric compounds prepared therefrom. More particularyl, the present invention provides modified nucleosides having at least one 5′-substituent and a 2′-O-substituent, oligomeric compounds comprising at least one of these modified nucleosides and methods of using the oligomeric compounds. In some embodiments, the oligomeric compounds provided herein are expected to hybridize to a portion of a target RNA resulting in loss of normal function of the target RNA.
[EN] NOVEL DERIVATIVES OF ACYL CYANOPYRROLIDINES<br/>[FR] NOUVEAUX DÉRIVÉS D'ACYLE CYANOPYRROLIDINES