Preparation and absolute stereochemistry of isomeric pyridylethanols and threo-di (2-pyridyl) ethanediol
M Imuta, H Ziffer
Index: Imuta,M.; Ziffer,H. Journal of Organic Chemistry, 1978 , vol. 43, # 18 p. 3530 - 3532
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Citation Number: 39
Abstract
Conclusions The determination of long-range 13C-lH and 13C-13C coupling constants is extremely useful for peak assignment in 13C NMR spectroscopy. Observation of exocyclic coupling to methyl hydrogens allows assignment of the ipso and ortho carbons of methyl compounds, while the 3 J~ 3-i 3~ of 2-13C-enriched imidazole derivatives identifies carbons three bonds distant. For 5 (6)-substituted benzimidazoles, correlations of 13C chemical ...
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