Manganese (III) acetate mediated synthesis of polysubstituted pyrroles under solvent-free ball milling
作者:Ji-Chao Zeng、Hui Xu、Fei Yu、Ze Zhang
DOI:10.1016/j.tetlet.2017.01.016
日期:2017.2
Under solvent-free ball milling conditions, a simple and mild method was developed for efficient synthesis of 2,5-dimethyl-3,4-dicarboxylate-pyrroles and N-substituted 3,4-diphenylpyrroles via condensation-annulation of amines with acetoacetate and 2-phenylacetaldehyde, respectively. The use of cheap and safe Mn(OAc)3 as a mediator, no use of commonly employed acetic acid as solvent, short reaction
在无溶剂球磨条件下,开发了一种简单温和的方法,可通过胺与乙酰乙酸酯和乙酰胺的缩合环化反应,高效合成2,5-二甲基-3,4-二羧酸吡咯和N-取代的3,4-二苯基吡咯。2-苯基乙醛。使用廉价和安全的Mn(OAc)3作为介体,不使用常用的乙酸作为溶剂,反应时间短和易于获得的起始原料,使得该方案成为传统合成多取代吡咯的良好选择。