| 摘要 |
2-Chloropyridine, 2,6-dichloropyridine, 2,3,6-trichloropyridine, and 2,3,5,6-tetrachloropyridine are prepared by reacting alpha-picoline in the gas phase with choline at temperature from about 200.degree.C in the presence of water and an amount of catalyst effective to catalyze the reaction. |
