Synthesis Studies toward Chloroazaphilone and Vinylogous γ-Pyridones: Two Common Natural Product Core Structures
作者:Wan-Guo Wei、Zhu-Jun Yao
DOI:10.1021/jo050414g
日期:2005.6.1
Chloroazaphilone is a common structure found in a number of natural products. Reported herein is a practical synthesis of a model chloroazaphilone that utilizes Pb(OAc)4 oxidation of HClO4/HOAc pyrinium salt in a key one-pot operation. Reaction of this chloroazaphilone with various primary amines to afford the corresponding vinylogous γ-pyridones was also fully investigated. The isolation of stable
氯氮杂苯甲酮是许多天然产物中常见的结构。本文报道的是在一个关键的一锅操作中利用HClO 4 / HOAc吡啶鎓盐的Pb(OAc)4氧化的模型氯氮杂苯酮的实用合成方法。还充分研究了该氯氮杂苯甲酮与各种伯胺的反应,得到相应的乙烯基γ-吡啶酮。稳定的烯胺中间体的分离提供了反应机理的直接证据。