1H and 13C NMR spectral studies of some 4H-3,1-benzoxazin-4-ones and their 2-acylaminobenzoic acid precursors
作者:Alan G Osborne、Zia Goolamali
DOI:10.1016/s1386-1425(99)00206-1
日期:2000.5
The 1H and 13C NMR spectra of twelve 4H-3,1-benzoxazine-4-ones and of their acylaminobenzoic acid precursors are presented. Differentiation between these two series of compounds is best achieved through the characteristic J(CH) coupling interactions in the high frequency carbonyl region. Some 4H-pyrido[2,3-d][1,3]oxazin-4-ones have also been studied and some earlier literature assignments revised.
给出了十二个4H-3,1-苯并恶嗪-4-酮及其酰基氨基苯甲酸前体的1H和13C NMR光谱。这两个系列化合物之间的区别最好通过高频羰基区域中的特征性J(CH)偶联相互作用实现。还研究了一些4H-吡啶并[2,3-d] [1,3]恶嗪-4-酮,并对一些较早的文献进行了修订。