[EN] METHOD OF PREPARATION OF NOVEL NUCLEOSIDE ANALOGS AND USES<br/>[FR] PROCEDE POUR PREPARER DE NOUVEAUX ANALOGUES DE NUCLEOSIDE, ET LEURS UTILISATIONS
申请人:AUSPEX PHARMACEUTICALS INC
公开号:WO2005049582A1
公开(公告)日:2005-06-02
Processes for the preparation of racemic and optically active nucleoside analogs of formula (A) are described. These compounds are useful as anti-infective agents, antisense therapeutic agents and hybridization assay probes.
Efficient dynamic kinetic resolution of racemic secondary alcohols by a chemoenzymatic system using bifunctional iridium complexes with C–N chelate amido ligands
作者:Yasuhiro Sato、Yoshihito Kayaki、Takao Ikariya
DOI:10.1039/c2cc30333g
日期:——
The combined catalyst system of bifunctional amidoiridium complexes derived from benzylic amines with CALB was found to provide a range of chiral acetates from racemic secondaryalcohols in excellent yields with nearly perfect enantioselectivities via dynamic kinetic resolution.
dynamic kinetic resolution of benzylic and aliphatic secondaryalcohols. A detailed study of the Knölker‐type iron complexes demonstrated the hydrogen autotransfer of alcohols to proceed under mild reaction conditions and allowed the combination with the enzymatic resolution. Different racemic alcohols were efficiently converted to chiral acetates in good yields and with excellent enantioselectivities
The asymmetric synthesis of β-nitroalkanol derivatives was simply achieved by a combined nitroaldol (Henry) reaction with lipase-catalyzed transesterification in high yield and enantiomeric purity (up to 92% and 99% ee) through a direct one-pot procedure.