3,5-Dichloro-2-(trichloromethyl)pyridine → Pyridine, 2,3,5-trichloro-

The batch chlorinator R1 was charged with 50 grams of starting material containing 90.4% 3,5-dichloro-2-trichloromethyl pyridine by weight, and chlorine was sparged through the reactor by means of sparger 14 for 15 hours at a reaction temperature of 170° C. Samples were taken at the time which corresponded to about 14% conversion of the 3,5-dichloro-2-trichloromethly pyridine. The yield of 2,3,5-trichloropyridine at this temperature, was about 14%, i.e., about half the yield of like runs at 200° C. (Table ONE). The chlorination was then continued under the same reaction conditions except at a temperature of 160° C. and yielded no appreciable quantity of 2,3,5-trichloropyridine in 8 hours. Analytical data with respect to this Example are presented in the following Table TWO:

1. customwas sparged through the reactor by means of sparger 14 for 15 hours at a reaction temperature of 170° C
2. customat 200° C.
3. customThe chlorination was then continued under the same reaction conditions except at a temperature of 160° C.

ORD record

ord-436e12bdfbd24b82ad7a2e007161da74

Source dataset

uspto-grants-1986_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04563531