摘要
利用Ｈ－ＨＣＯＳＹ和Ｃ－ＨＣＯＳＹ谱实现对~１Ｈ和^（１３）Ｃ谱的指认和归属；利用ＨＭ－ＢＣ谱确定分子的骨架；根据~１Ｈ－~１Ｈ标量偶合常数的大小推出相邻碳原子上质子的相对位置；并结合其它谱学数据，确定了从天然产物分离得到的吡喃酮衍生物Ｃ_９Ｈ_（１２）－Ｏ_４的化学结构并命名为２－（１’，２’－环氧丙烷基）－４－羟基－５－甲基－２－戊烯－５－酸内酯。
The chemical structure of a new pyranone derivative C_9H_(12)O_4 isolated recently from plant has been characterized by several NMR techniques and other spectral data. H-H COSY and C-H COSY were used to analyze and assign the ￣1H and ￣(13)C peaks, HMBC to confirm the molecular skeleton with quarternary carbons. The relative position of some protons on the adjacent atoms were derived from the scalar coupling information.The molecule was named as 2-( 1' , 2'-Expoxypropyl )- 4-hydroxy-5-methyl-2-penten-5-olide.
基金
博士后自然科学基金
福建省自然科学基金
关键词
NMR
结构
吡喃酮衍生物
nuclear magnetic resonance,chemical structure,pyranone derivative
