[EN] COMPOUNDS INCLUDING MAP KINASE INTERACTING KINASES 1 AND 2 (MNK1 AND MNK2) MODULATORS AND ABL AND ABL (T315I) INHIBITORS, AND USES THEREOF [FR] COMPOSÉS COMPRENANT DES MODULATEURS DES KINASES INTERAGISSANT AVEC LES MAP KINASES 1 ET 2 (MNK1 ET MNK2) ET DES INHIBITEURS D'ABL ET ABL (T315I), ET LEURS UTILISATIONS
[EN] COMPOUNDS INCLUDING MAP KINASE INTERACTING KINASES 1 AND 2 (MNK1 AND MNK2) MODULATORS AND ABL AND ABL (T315I) INHIBITORS, AND USES THEREOF [FR] COMPOSÉS COMPRENANT DES MODULATEURS DES KINASES INTERAGISSANT AVEC LES MAP KINASES 1 ET 2 (MNK1 ET MNK2) ET DES INHIBITEURS D'ABL ET ABL (T315I), ET LEURS UTILISATIONS
Practical Method for Asymmetric Addition of Arylboronic Acids to α,β-Unsaturated Carbonyl Compounds Utilizing an In Situ Prepared Rhodium Catalyst
作者:Kirill Lukin、Qunying Zhang、M. Robert Leanna
DOI:10.1021/jo802136j
日期:2009.1.16
A new practical method for the asymmetric Michael addition of arylboronic acids to α,β-unsaturated carbonyl compounds utilizing in situ generated chiral rhodium-binap-based catalyst has been developed to address the unavailability of the preformed catalysts. While maintaining high levels of enantioselectivity reported for the preformed catalysts, the new method provides a convenient access to either
Easily accessible Salox ligands in combination with cobalt were found to be competent catalysts for the asymmetric conjugate reduction of α,β-unsaturatedesters, amides, and nitriles with NaBH4 To give enantioselectivity up to 96.5 : 3.5 er and quantitative yields. Preliminary experiments highlight a relatively complex reaction mechanism.