C-13 NMR-STUDIES OF FLAVONOIDS .3. NATURALLY OCCURRING FLAVONOID GLYCOSIDES AND THEIR ACYLATED DERIVATIVES
C-13 NMR-STUDIES OF FLAVONOIDS .3. NATURALLY OCCURRING FLAVONOID GLYCOSIDES AND THEIR ACYLATED DERIVATIVES
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DOI：
10.1016/0040-4020(78)88336-7
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发表时间：
1978-01-01
期刊：
影响因子：
2.1
通讯作者：
MABRY, TJ
中科院分区：
文献类型：
--
作者：
MARKHAM, KR;TERNAI, B;MABRY, TJ
本文给出并分析了多种黄酮苷类化合物的~（13）C NMR谱。提出的证据表明，13 C NMR光谱是一种有价值的技术，可用于区分黄酮苷中甲基化、糖基化和酰化的位点，以及在某些情况下特定糖和酰基的性质和位点。在5-OH基团衍生的光谱中观察到的位移是不寻常的。糖苷糖中的环大小和C-1构型也从光谱中显而易见。对几种糖苷进行了结构归属。
13C NMR spectra for a variety of flavonoid glycosides are presented and analyzed. Evidence is presented which demonstrates that 13C NMR spectroscopy is a valuable technique for distinguishing the sites of methylation, glycosylation and acylation in flavonoid glycosides, and in some cases the nature and sites of specific sugars and acyl groups. Shifts observed in the spectrum on derivation of the 5-OH group are unusual. The ring size and C-1 configuration in glycosidic sugars are also evident from the spectra. Structural assignments are made for several glycosides.