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13 C NMR of coumarins. IV —Furanocoumarins
Author(s) -
Macias F. A.,
Massanet G. M.,
RodriguezLuis F.,
Salvá J.
Publication year - 1990
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260280305
Subject(s) - chemistry , furanocoumarin , carbon 13 nmr , stereochemistry , organic chemistry
13 C NMR data for several linear furanocoumarins are reported. The β, γ syn and δ effects of a 5‐oxygenated function on the coumarinic skeleton were measured. A spectroscopic criterion for distinguishing between C‐5 and C‐8 oxygenated, between C‐5 oxygenated, C‐8 alkylated and C‐5 alkylated, C‐8 oxygenated linear furanocoumarins and between C‐5 oxygenated linear or angular furanocoumarins is proposed.