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13 C NMR of coumarins. V —3‐prenylated coumarins
Author(s) -
Macias F. A.,
HernándezGalán R.,
Massanet G. M.,
Rodriguezluis F.,
Vasquez M.,
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.1260280814
Subject(s) - chemistry , prenylation , coumarin , carbon 13 nmr , stereochemistry , side chain , two dimensional nuclear magnetic resonance spectroscopy , nuclear magnetic resonance spectroscopy , organic chemistry , polymer , enzyme
13 C NMR data of nineteen coumarins, twelve of which bear a prenyl (isoprenoid) side‐chain at C‐3, are reported and compared with those of the C‐3 unsubstituted compounds. Unlike the linear isomers, no γ‐effect is observed in the corresponding angular derivatives; this is proposed as spectroscopic criterion for distinguishing between these isomers.