Vapor phase catalytic chlorination of β-picoline
View Patent ↗2-Chloro-5-trichloromethylpyridine is obtained by chlorinating β-picoline in the vapor phase using a Mordenite zeolite or a supported palladium catalyst.
1. An improved process for chlorinating β-picoline (I)
in the vapor phase at elevated temperatures to obtain a chlorination mixture enriched in 2-chloro-5-trichloromethylpyridine (β-2-tet) (II)
wherein the improvement comprises contacting the β-picoline (I) with chlorine in the presence of a dealuminated Mordenite zeolite or a supported palladium catalyst.
2. A process according to claim 1 in which the β-picoline is contacted with chlorine in the presence of a dealuminated Mordenite zeolite catalyst.
3. A process according to claim 1 in which the β-picoline is contacted with chlorine in the presence of a supported palladium catalyst.