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Carbon‐13 nuclear magnetic resonance spectra of methyl 2‐pyronecarboxylates
Author(s) -
Imagawa Takeshi,
Haneda Akira,
Kawanisi Mituyosi
Publication year - 1980
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270130404
Subject(s) - substituent , pyrone , spectral line , ring (chemistry) , coupling constant , chemistry , nuclear magnetic resonance , nmr spectra database , carbon 13 nmr , carbon fibers , stereochemistry , materials science , organic chemistry , physics , composite number , composite material , particle physics , astronomy
The 13 C NMR spectra of methyl 2‐pyrone‐3‐, 4‐, 5‐ and 6‐carboxylates were studied and the substituent effects on the 2‐pyrone ring were compared with those of some model compounds. 1 H NMR spectra were also recorded and discussed. The long range 13 C, 1 H coupling constants were obtained, discussed and proved useful in signal assignments.