Ruthenium(II)-catalyzed asymmetric transfer hydrogenation of aromatic ketones in water using novel water-soluble chiral monosulfonamide ligands
作者:Zhongqiang Zhou、Qiong Ma、Yong Sun、Aiqing Zhang、Lin Li
DOI:10.1002/hc.20641
日期:——
The ruthenium catalysts prepared in situ by reacting chiral monosulfonamides with [RuCl2(p-cymene)]2 afforded high conversion rates and enantiomeric excess (ee) values in the asymmetric transfer hydrogenation of aromatic ketones in aqueous HCOONa. Furthermore, the catalyst could be easily recovered and reused at least five times without obvious loss of ee value. © 2010 Wiley Periodicals, Inc. Heteroatom
Noyori's (R,R)-N-(p-tolylsulfonyl)-1,2-diphenylethyl-enediamine 和 Knochel's (R,R)-N-(p-tolylsulfonyl)-1,2-二氨基环己烷的新型水溶性类似物,已经合成了含有额外季铵基团的化合物。通过手性单磺酰胺与 [RuCl2(p-cymene)]2 反应原位制备的钌催化剂在芳族酮在 HCOONa 水溶液中的不对称转移氢化中提供了高转化率和对映体过量 (ee) 值。此外,催化剂可以很容易地回收和重复使用至少 5 次,而没有明显的 ee 值损失。© 2010 Wiley Periodicals, Inc. 杂原子化学 21:505–514, 2010; 在 wileyonlinelibrary.com 上在线查看这篇文章。DOI 10.1002/hc.20641