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NMR studies of the electronic structure of coumarins

โœ Scribed by G. S. Kupriyanova


Book ID
110672102
Publisher
SP MAIK Nauka/Interperiodica
Year
1997
Tongue
English
Weight
474 KB
Volume
38
Category
Article
ISSN
0022-4766

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๐Ÿ“œ SIMILAR VOLUMES


13C NMR of coumarins. IIIโ€”Simple coumari
โœ F. A. Macias; G. M. Massanet; F. Rodrรญguez-Luis; J. Salvรก ๐Ÿ“‚ Article ๐Ÿ“… 1989 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 236 KB

13C NMR data for several simple coumarins are reported. The ysvn effect of a 5-methoxy substituent on the C-4 chemical shift was observed and measured. The effects of an 8-iodo substituent on the chemical shifts of the carbons of the coumarinic skeleton are discussed.

13C NMR of coumarins. Vโ€”3-prenylated cou
โœ F. A. Macias; R. Hernรกndez-Galรกn; G. M. Massanet; F. Rodriguezluis; M. Vasquez; ๐Ÿ“‚ Article ๐Ÿ“… 1990 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 386 KB

## Abstract ^13^C NMR data of nineteen coumarins, twelve of which bear a prenyl (isoprenoid) sideโ€chain at Cโ€3, are reported and compared with those of the Cโ€3 unsubstituted compounds. Unlike the linear isomers, no ฮณโ€effect is observed in the corresponding angular derivatives; this is proposed as s

NMR study of some coumarins and furocoum
โœ R. Miranda; L. Santana; E. Uriarte; G. Zagotto ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 260 KB

The 1H and 13C NMR spectra of various methylcoumarins and methylfuroeoumarins are reported. All signals were assigned and the influence on chemical shifts of methylation at various positions was determined.