An easy synthesis of α-trifluoromethyl-amines from aldehydes or ketones using the Ruppert-Prakash reagent
作者:Dmytro S. Radchenko、Oleg M. Michurin、Anton V. Chernykh、Oleg Lukin、Pavel K. Mykhailiuk
DOI:10.1016/j.tetlet.2013.01.132
日期:2013.4
A small library of structurally diverse primary amines bearing a geminal CF3 group was synthesized on a preparative scale. The synthesis starts with an aldehyde or ketone that reacts with benzylamine yielding the corresponding imine. The latter is then trifluoromethylated with Me3SiCF3 under acidic conditions to give a benzylalkylamine. In the last step the Pd-mediated hydrogenation of the benzylalkylamines
以制备规模合成了一个带有双链CF 3基团的结构多样的伯胺的小型文库。合成从醛或酮开始,该醛或酮与苄胺反应生成相应的亚胺。然后在酸性条件下用Me 3 SiCF 3对后者进行三氟甲基化,得到苄基烷基胺。在最后一步中,Pd介导的苄基烷基胺加氢提供了标题化合物。所有的合成步骤都是高产的。中间体的分离和产物的色谱纯化都没有必要。