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NMR analysis and synthesis of 6‐ and 8‐ C ‐methylisoflavones
Author(s) -
Markham K. R.,
Mabry T. J.,
Rahman W.,
Jehan Sardar
Publication year - 1967
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570040110
Subject(s) - chemistry , proton nmr , proton , carbon 13 nmr , isoflavones , stereochemistry , nuclear physics , physics , biochemistry
NMR data for eighteen 6‐ and 8‐ C ‐methylisoflavones provide conclusive evidence that in isoflavones, the C‐8 proton and C‐8 methyl signals occur downfield from the C‐6 proton and C‐6 methyl signals. Other useful NMR correlations and the synthesis of five new C‐methylisoflavones are described.