Chiral-at-metal iridium complex for efficient enantioselective transfer hydrogenation of ketones
作者:Cheng Tian、Lei Gong、Eric Meggers
DOI:10.1039/c6cc00972g
日期:——
A bis-cyclometalated iridium(III) complex with metal-centered chirality catalyzes the enantioselectivetransferhydrogenation of ketones with high enantioselectivities at low catalyst loadings down to 0.002 mol%. Importantly, the rate of catalysis...
available ketones. Mechanistic studies suggest that this Rh-catalyzed deoxygenative borylation of ketones goes through an alkene intermediate, which undergoes regiodivergent hydroboration to afford linear and branched alkylboronates. The different steric effects of PPh2Me and P(nBu)3 were found to be responsible for product selectivity by density functional theory calculations. The alkene intermediate
在这里,我们报告了一种有效的铑催化酮脱氧硼酸化合成烷基硼酸酯,其中区域选择性可以通过选择配体来切换。直链烷基硼酸酯仅在 P( n Bu) 3存在下获得,PPh 2 Me 有利于支链烷基硼酸酯的形成。该协议还允许从现成的酮中获取 1,1,2-三硼酸酯。机理研究表明,这种 Rh 催化的酮类脱氧硼酸化反应经过烯烃中间体,该中间体经历区域发散硼氢化反应,得到直链和支链烷基硼酸酯。PPh 2 Me 和 P( n Bu) 3的不同空间位阻效应通过密度泛函理论计算发现是产物选择性的原因。烯烃中间体也可以依次进行脱氢硼酸化和硼氢化反应以提供三硼酸酯。
[EN] HEPATITIS C VIRUS INHIBITORS<br/>[FR] INHIBITEURS DU VIRUS DE L'HEPATITE C
申请人:LG LIFE SCIENCES LTD
公开号:WO2004111013A1
公开(公告)日:2004-12-23
The present invention relates to new compounds useful for the treatment or prevention of hepatitis C, process for preparing them, and a composition for the treatment or prevention of hepatitis C comprising the compounds as an active ingredient.
Highly Enantioselective Transfer Hydrogenation of Ketones with Chiral (NH)<sub>2</sub>P<sub>2</sub>Macrocyclic Iron(II) Complexes
作者:Raphael Bigler、Raffael Huber、Antonio Mezzetti
DOI:10.1002/anie.201501807
日期:2015.4.20
Bis(isonitrile) iron(II) complexes bearing a C2‐symmetric diamino (NH)2P2 macrocyclic ligand efficiently catalyze the hydrogenation of polar bonds of a broad scope of substrates (ketones, enones, and imines) in high yield (up to 99.5 %), excellent enantioselectivity (up to 99 % ee), and with low catalyst loading (generally 0.1 mol %). The catalyst can be easily tuned by modifying the substituents of
带有C 2对称的二氨基(NH)2 P 2大环配体的双(异腈)铁(II)络合物可以高产率(上)高效催化广泛范围内底物(酮,烯酮和亚胺)的极性键氢化。至99.5%(99.5%ee),优异的对映选择性(高达99%ee),并且催化剂负载量低(通常为0.1 mol%)。通过修饰异腈配体的取代基可以容易地调节催化剂。
Enantiocomplementary C-H Bond Hydroxylation Combining Photo-Catalysis and Whole-Cell Biocatalysis in a One-Pot Cascade Process
An alternative one‐pot cascade protocol combining photo‐catalysis and whole‐cell biocatalysis for the production of enantiocomplementary alcohols was developed.