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


DURING an investigation, previously referred to1, of the nitrogenous bases extracted by sulphuric acid from the ‘benzol absorbing oil’ fraction of vertical retort coal tar, a tertiary base has been isolated which has been proved to be 2:3:4:6-tetramethylpyridine, a compound which has not hitherto been reported as a constituent of coal tar. This compound, however, has been previously isolated from Fushun shale oil by Eguchi2, and from Scottish shale oil by Benzie and Milne3.

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  1. 1

    Nisbet, H. B., and Pryde, A. M., Nature, 167, 862 (1951).

  2. 2

    Eguchi, T., Bull. Chem. Soc. Japan, 3, 237 (1928).

  3. 3

    Benzie, R. J., and Milne, J. N. (Ph.D. theses, Univ. of Edinburgh, 1949). Benzie, Milne and Nisbet, Proc. 2nd International Oil Shale and Cannel Coal Conference (Glasgow, 1950).

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NISBET, H., PRYDE, A. Isolation of 2:3:4:6-Tetramethylpyridine from Coal Tar. Nature 168, 832–833 (1951).

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