Asymmetric α-oxyamination of aldehydes by synergistic catalysis of imidazolethiones and metal salts
作者:Xianrui Liang、Na Li、Xinlei Chen、Weike Su
DOI:10.1039/c4ra08556f
日期:——
Novel and efficient imidazolethione catalysts combined with metal salts were successfully introduced to the asymmetric α-oxyamination of aldehydes. The desired products with high yields and good to excellent enantioselectivities were obtained via a one-pot oxidation–oxyamination reaction system.
Organocatalyzed α-Oxyamination of Aldehydes Using Anodic Oxidation
作者:Nhat-Nguyen Bui、Xuan-Huong Ho、Sun-il Mho、Hye-Young Jang
DOI:10.1002/ejoc.200900871
日期:2009.11
Electrochemical oxidation was performed during the organocatalyzed α-oxyamination of aldehydes by using a one-compartment electrolytic cell under galvanostatic conditions. In the presence of substoichiometric amounts of sec-amines, the desired coupling products were formed in good yield. The asymmetric variant of the α-oxyamination of aldehydes was examined by using chiral sec-amines. Control experiments
Metal-Free Direct Asymmetric Aminoxylation of Aldehydes Catalyzed by a Binaphthyl-Based Chiral Amine
作者:Taichi Kano、Haruka Mii、Keiji Maruoka
DOI:10.1002/anie.201002965
日期:2010.9.3
And I'm free, metal‐free fallin': A metal‐free directasymmetricaminoxylation of aldehydes with the oxoammonium salt 1, generated in situ from TEMPO and benzoyl peroxide (BPO), was found to be catalyzed by a binaphthyl‐based secondary amine (S)‐2. This method provides a new approach to bench‐stable optically active α‐aminoxy aldehydes as useful chiral building blocks. TMS=trimethylsilyl.
Metal-Free Enantioselective Hydroxyamination of Aldehydes with Nitrosocarbonyl Compounds Catalyzed by an Axially Chiral Amine
作者:Taichi Kano、Fumitaka Shirozu、Keiji Maruoka
DOI:10.1021/ja4099627
日期:2013.12.4
The first example of a highly regio- and enantioselective hydroxyamination of aldehydes with in situ generated nitrosocarbonyl compounds from hydroxamic acid derivatives was realized by combined use of TEMPO and BPO as the oxidant in the presence of a binaphthyl-modified amine catalyst.
在联萘改性的胺催化剂存在下,通过结合使用 TEMPO 和 BPO 作为氧化剂,实现了醛与异羟肟酸衍生物原位生成的亚硝基羰基化合物的高度区域和对映选择性羟基胺化的第一个例子。