The =C NMR spectra of oxazolopyridine systems are discussed, and a simple method for distinguishing between 2-methyloxazolo- and3-metbylisoxazolo-pyridines is suggested, b e d on the & m i d shift of the methyl group. The effect of the 2-methyloxazole fusion on the pyridine ring is comparable to tha
Carbon-13 NMR Studies on Azolopyridines. 4—The Tiazolopyridine Systems
✍ Scribed by Stefano Chimichi; Piero Tedeschi; Stefano Calvietti; Fabio Ponticelli
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 225 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
The 13C NMR spectra of thiazolopyridine systems are discussed. One-bond and long-range 13C-1H coupling constants were determined from line splittings and a simple method for distinguishing between 2-methylthiazoloand 3-methylisothiazolopyridines is suggested.
📜 SIMILAR VOLUMES
## Abstract All four fully aromatic isothiazolopyridine isomers have been synthesized, their ^13^C spectra have been assigned and all one‐bond and long‐range ^13^C^1^H coupling constants have been determined.
## Abstract The paramagnetic contribution to the ^13^C and ^1^H nuclear relaxation rates in the ethanol‐Mn(II) system has been calculated. Both __T__~1~ and __T__~2~ experiments have been performed by means of Fourier transform and partially relaxed Fourier transform NMR spectroscopy. The correlati
## Abstract ^13^C chemical shift assignment of several methyl substituted heterocyclic naphtho‐ and anthraquinones, including dihydronaphthofuranquinones, azaanthraquinones, benzopyrroloquinolinediones and benzothiophenoquinolinediones, are described. A deshielding effect due to a methyl group was