已经建立了 RuPHOX-Ru 催化的二芳基酮不对称氢化,以高达 99% 的产率和 99% ee 提供相应的手性二芳基甲醇。该方案可以在催化剂负载量相对较低 (2000 S/C) 的克规模上进行,所得产品可进行多种有用的转化,特别是用于手性药物的合成,例如 ( S ) -Orphenadrine和( S )-新苯二甲酸。氘标记和对照实验表明,RuPHOX-Ru 催化的不对称氢化完全以 H 2作为唯一氢源进行氢化。
Nickel‐catalyzed carbonyl arylation reaction employing aldehydes with aryl and allyl halides was demonstrated. Various aryl, α,β‐unsaturated aldehyde and aliphatic aldehydes can be converted into their corresponding secondary alcohols in moderate‐to‐high yields under the reductive coupling condition.
CuCl/Bipyridine-Catalyzed Addition Reactions of Arylboroxines with Aldehydes, α,β-Unsaturated Ketones, and <i>N</i>-Tosyl Aldimines
作者:Yuan-Xi Liao、Qiao-Sheng Hu
DOI:10.1021/jo201338v
日期:2011.9.16
CuCl/bipyridine-catalyzed addition reactions of arylboroxines with aldehydes and α,β-unsaturatedketones at elevated temperatures were described. By using the microwave energy, CuCl/bipyridine-catalyzed addition reactions of arylboroxines with aldimines were also realized.
Rh(I)/diene-catalyzed addition reactions of aryl/alkenylboronic acids with aldehydes
作者:Chun-Hui Xing、Tao-Ping Liu、Jin Rong Zheng、Jaclynn Ng、Michelle Esposito、Qiao-Sheng Hu
DOI:10.1016/j.tetlet.2009.06.074
日期:2009.9
[Rh(COD)Cl]2-catalyzed additionreactions of arylboronic acids with aldehydes, with low Rh(I) catalyst loading, are described. We also found that the reaction of arylboronic acids with α,β-unsaturated aldehydes greatly depends on the solvent and the steric hindrance of the reagents/substrates.
There is disclosed a process for producing benzhydrls by reacting an arylmetal compound with an aromatic aldehyde. According to this process, benzhydrols useful as raw materials for medicines and photopolymerization initiators can be produced in a high yield and industrially advantageously.
A nontransmetalation reaction pathway for anionic four-electron donor-based palladacycle-catalyzed addition reactions of arylborons with aldehydes
作者:Yuan-Xi Liao、Chun-Hui Xing、Matthew Israel、Qiao-Sheng Hu
DOI:10.1016/j.tetlet.2011.04.074
日期:2011.6
nontransmetalation reaction pathway for anionic four-electron donor-based (Type I) palladacycle-catalyzed additionreactions of arylborons with aldehydes is described. This newreaction pathway offers new catalysis opportunities for Type I palladacycle-catalyzed additionreactions such as the exceptionally low catalyst loading catalysis, with the catalyst loading as low as 0.0005 mol %. This new pathway may