Enantioselective organocatalytic reductive amination of aliphatic ketones by benzothiazoline as hydrogen donor
作者:Kodai Saito、Takahiko Akiyama
DOI:10.1039/c2cc31486j
日期:——
The chiral phosphoric acid-catalyzed enantioselectivereductiveamination of aliphatic ketones with aromatic amines was successfully achieved by the use of benzothiazoline as the hydrogen donor. Corresponding chiral aliphatic amines were obtained with excellent enantioselectivities.
Bifunctional Catalysis: Direct Reductive Amination of Aliphatic Ketones with an Iridium-Phosphate Catalyst
作者:Barbara Villa-Marcos、Chaoqun Li、Keith R. Mulholland、Philip J. Hogan、Jianliang Xiao
DOI:10.3390/molecules15042453
日期:——
pathway to these amines is directasymmetric reductive amination (DARA) of prochiral ketones. This paper shows that a wide range of aliphatic ketones can be directly aminated under hydrogenation conditions, affording chiral amines with good to excellent yields and with enantioselectivities up to 96% ee. The catalysis is effected by the cooperative action of a cationic Cp*Ir(III) complex and its phosphate
手性胺是精细化工、医药和农化产品中普遍存在的官能团之一,这些胺最方便、经济和生态友好的合成途径是前手性酮的直接不对称还原胺化(DARA)。这篇论文表明,在氢化条件下可以直接胺化范围广泛的脂肪族酮,从而提供具有良好到极好的产率和高达 96% ee 的对映选择性的手性胺。催化作用受阳离子 Cp*Ir(III) 络合物及其磷酸盐反阴离子的协同作用的影响。
Asymmetric Transfer Hydrogenation of Ketimines by Indoline as Recyclable Hydrogen Donor
The chiral phosphoric acid catalyzed enantioselective transferhydrogenation of various ketimines was achieved by the use of 2-aryl indoline as the hydrogen donor. Corresponding chiral amines were obtained in good chemical yields with excellent enantioselectivities.