In this paper, commercially available ZnO was found to be a highly effective catalyst for three-component
coupling reactions of alkynes, aldehydes/or ketone and amines (A3-coupling) via C-H activation. The reactions could be
applied to both aromatic and aliphatic aldehydes. Nearly quantitative yields of the desired products were obtained in most
cases. No co-catalyst or activator is required, and water is the only by-product in the reactions. Heterogeneous nature of
the catalyst made it reusable for further chemical reactions.
本文发现,市售 ZnO 是一种高效催化剂,可通过 C-H 活化实现炔、醛/或酮和胺的三组分偶联反应(A3-偶联)。该反应既可用于
芳香族醛,也可用于脂肪族醛。在大多数情况下,都能获得接近定量的所需产物。反应不需要助催化剂或活化剂,
水是反应中唯一的副产物。催化剂的异构性质使其可重复用于进一步的
化学反应。