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13C NMR spectroscopic study of the tautomeric equilibrium in p-phenyl substituted benzoylacetones

✍ Scribed by Cravero, Raquel M.; Gonz�lez-Sierra, Manuel; Olivieri, Alejandro C.

Book ID: 120158548
Publisher: Royal Society of Chemistry
Year: 1993
Tongue: English
Weight: 631 KB
Volume: 6
Category: Article
ISSN: 1472-779X
DOI: 10.1039/P29930001067

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## Abstract The tautomerism of 5(6)‐methoxy‐2‐{[(4‐methoxy‐3,5‐dimethyl‐2‐pyridinyl)methyl] sulfinyl}‐1__H__‐benzimidazole (omeprazole) was determined in solution, __K__~__T__~ = 0.59 in THF at 195 K, in favor of the 6‐methoxy tautomer. The assignment of the signals was made by comparison with its