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Isolation of 2:3:4:6-Tetramethylpyridine from Coal Tar

✍ Scribed by NISBET, H. B.; PRYDE, A. M.

Book ID
109568760
Publisher
Nature Publishing Group
Year
1951
Tongue
English
Weight
212 KB
Volume
168
Category
Article
ISSN
0028-0836

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πŸ“œ SIMILAR VOLUMES

Studies in the coal tar bases. II. The i
Studies in the coal tar bases. II. The isolation of 2-methyl-6ethylpyridine from a lutidine fraction
✍ Jones, J. Idris πŸ“‚ Article πŸ“… 1950 πŸ› Wiley (John Wiley & Sons) βš– 224 KB

## Abstract 2‐Mcthyl‐6‐cthylpyridinc, hitherto not reported as a coal tar constituent, has been isolated from a lutidine fraction of coal tar bases as an zoetrope with proionic acid. Its orientation has been established by oxidation to picolinic acid and by comparison of its ultraviolet absorption

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study ( < -30"C)1111. This is best evidenced by the upfield shift of protons H' (by 23Hz) and H5 (by 32Hz) on going from ( 3 ) to ( 5 ) , which simply reflects the increased availability of the lone pair for limited delocalization but is clearly inconsistent with the development of the diamagnetic r