N,N,2-trimethyl-3-phenylacrylamide 950.0~1000.0 ℃
、0.2 Pa
条件下,
生成 1,3-dimethyl-4-phenyl-pyrrolidin-2-one 、 1,3-dimethyl-4-phenyl-pyrrolidin-2-one
参考文献:
名称:
Cyclisation at very high temperature. Thermal transformations of N-alkyl and N, N-dialkyl amides of α,β-unsaturated acids into mono- and bicyclic heterocycles under FVT conditions
摘要:
Cyclisations of N-alkyl and N,N-dialkyl cinnamic amides to the corresponding pyrrolidin-2-ones under the conditions of flash vacuum thermolysis (FVT), are described. It was found that these reactions proceed at 950-1000 degrees C affording in various yields the mixtures of isomeric mono and bicyclic gamma-lactams, which were separated chromatographically and analysed by means of NMR spectroscopy. Two alternative mechanisms for the title process are proposed. (C) 2009 Elsevier Ltd. All rights reserved.
本文描述了一种实用且有效的叔丁醇钾 (KO t Bu)-促进羧酸与N , N-二甲胺的胺化。在催化量的 KO t Bu 存在下,在三甲基乙酸酐的帮助下,使用 DMF 作为二甲胺试剂,多种脂肪族和芳香族羧酸转化为N,N-二甲基酰胺。该协议的适用性通过复杂药物分子的后期二甲基酰胺化得到证明。涉及 KO t的似是而非的反应机制 在机理研究的基础上,提出了由甲酰胺分解和酸酐介导的缩合促进 Bu 促进的原位胺生成。