An efficient method for the facile synthesis of (E)-monoarylidene derivatives of homo- and heterocyclic ketones with various aldehydes in the presence of a pyrrolidine organocatalyst has been achieved. A range of α,β-unsaturated ketones were obtained in moderate to high yields (up to 99%). Unlike the Claisen-Schmidt condensation process, the formation of undesired bisarylidene byproducts is not observed. The possible reaction mechanism suggests that the reaction proceeds via a Mannich-elimination sequence.
在
吡咯烷有机催化剂的作用下,实现了一种高效的方法,可以方便地合成同环酮和杂环酮与各种醛的 (E)- 单芳基衍
生物。一系列 α、β-不饱和酮以中等至高产率(高达 99%)获得。与 Claisen-Schmidt 缩合过程不同的是,没有观察到不需要的双亚芳基副产物的形成。可能的反应机理表明,反应是通过曼尼希-消除顺序进行的。