C-13 NUCLEAR MAGNETIC-RESONANCE SPECTRA .11. C-13 NMR CHEMICAL-SHIFTS AND CARBON-PROTON COUPLING-CONSTANTS OF SOME FUROCOUMARINS AND FUROCHROMONES

被引：109

作者：

ELGAMAL, MHA ^{[1
]}

ELEWA, NH ^{[1
]}

ELKHRISY, EAM ^{[1
]}

DUDDECK, H ^{[1
]}

机构：

[1] RUHR UNIV BOCHUM, CHEM ABT, D-4630 BOCHUM, FED REP GER

来源：

PHYTOCHEMISTRY | 1979年 / 18卷 / 01期

关键词：

!sup]13[!/sup] C NMR; dihydrofurocoumarins; furochromones; furocoumarins;

D O I：

10.1016/S0031-9422(00)90932-4

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The 13C NMR spectra of a variety of [Ficus platyphylla, F. carica, Ammi majas and A. visnaga] furocoumarins, dihydrofurocoumarins and furochromones are reported. The signals were assigned using carbon-proton coupling constants, ring annullation shifts, nuclear Overhauser effect considerations and shift effects caused by monothioester formation. Substituent effects on 13C chemical shifts and carbon-proton coupling constants are discussed. Methoxyl induced shifts of 5- and 8-substituted furocoumarins are additive, but their effects cannot be transferred to the furochromone system.

引用

页码：139 / 143

页数：5

共 41 条

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