Asymmetric Hydrogenation of<i>tert</i>-Alkyl Ketones: DMSO Effect in Unification of Stereoisomeric Ruthenium Complexes
作者:Tomoya Yamamura、Hiroshi Nakatsuka、Shinji Tanaka、Masato Kitamura
DOI:10.1002/anie.201304408
日期:2013.8.26
Face off: The ruthenium complexes of a new axially chiral PNN ligand (L) are highly efficient in the presence of dimethylsulfoxide (DMSO) for hydrogenation of both functionalized and unfunctionalized tert‐alkyl ketones. DMSO is thought to narrow down the many possible complex stereoisomers into a single facial L/Ru complex, thus enhancing the reactivity, selectivity, and productivity.
面临的挑战:新型的轴向手性PNN配体(L)的钌络合物在二甲基亚砜(DMSO)的存在下对官能化和未官能化叔烷基酮的加氢都非常有效。DMSO被认为可以将许多可能的复杂立体异构体缩小为单个面部L / Ru复杂物,从而提高了反应性,选择性和生产率。