摘要
总结了作者所测定过的多取代酮及其糖甙类衍生物的１Ｈ和１３ＣＮＭＲ位移数据．着重就取代基与结构的关系进行了探讨．认为多取代酮１位和８位取代情况直接影响着其他位置的化学位移数值．这一现象可以直接用于该类化合物的结构鉴定．
H and 13C NMR spectra of polysubstituted xanthones and corresponding xanthone-O-glycoside, which are obtained from the plants of Qinghai-Xizang plateau,have been observed.The discussion are mainly focused on the relation between the chemical shifts and mode of substituted groups on 1,8 position of polysubstituted xanthone.1H chemical shifts of substituted hydroxy on1,8 position of xanthone have been summarised.The changes of chemical shift of carbon on xanthone ring caused by -O-sugar have been calculated and discussed.The result can be used to elucidate the structure of polysubstituted xanthone and xanthone-O-glycoslde.
出处
《波谱学杂志》
CAS
CSCD
1996年第6期557-565,共9页
Chinese Journal of Magnetic Resonance
