Structure of the reaction product of 4-hydroxy-2,3- dioxo-4-phenylbutanoic acid 1,4-lactone with o-phenylenediamine
作者:Bruce Coxon、Hans Dahn、Hassan S. El Khadem、David L. Swartz
DOI:10.1016/s0008-6215(00)90728-6
日期:1985.10
4-hydroxy-2,3-dioxo-4-phenylbutanoic acid 1,4-lactone (4-phenyl-2,3-dioxobutyro-1,4-lactone) with two moles of o -phenylenediamine, by high-resolution 1 H-, 13 C-, and 15 N-n.m.r. spectroscopy, as well as by electron-impact mass spectrometry, confirmed without ambiguity the structure of the product as the quinoxaline amide 5a . When 4-hydroxy-2,3-dioxo-4-phenylbutanoic acid 1,4-lactone is treated with o -phenylenediamine
摘要通过处理4-羟基-2,3-二氧代-4-苯基丁酸1,4-内酯(4-苯基-2,3-二氧代丁-1,4-获得的黄色产物(5a)的结构检查内酯)和2摩尔邻苯二胺,通过高分辨率1 H-,13 C-和15 Nn.mr光谱以及电子轰击质谱法确定,产品结构清晰明确,为喹喔啉酰胺5a。当用邻苯二胺处理4-羟基-2,3-二氧代-4-苯基丁酸1,4-内酯时,首先形成席夫碱,然后将其转化为喹喔啉内酯(6a)。然后,过量的邻苯二胺将喹喔啉内酯(6a)转化为黄色产物(5a)。