Process for preparing 2-chloro-5-trichloromethylpyridine
First Claim
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1. A liquid phase process for preparing 2-chloro-5-trichloromethylpyridine, said process consisting essentially of dissolving dry 3-methylpyridine in a dry inert liquid organic solvent and then passing dry chlorine through the resulting liquid reaction medium, at 50°
- to 130°
C. and under the influence of ultra violet light whereby the 3-methyl group of the 3-methylpyridine is trichlorinated and chlorine is also introduced into the 2-position so as to give 2-chloro-5-trichloromethylpyridine as the major product.
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Abstract
Herbicidal 3- and/or 5-halogenomethyl-pyrid-2-yloxyphenoxy compounds and processes for making and using the same. Intermediates for making these compounds and their preparation are also disclosed. Thus, for example, 2-chloro-5-trichloromethylpyridine is prepared by a liquid phase chlorination of 3-methylpyridine under the influence of ultra violet light.
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2 Claims
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1. A liquid phase process for preparing 2-chloro-5-trichloromethylpyridine, said process consisting essentially of dissolving dry 3-methylpyridine in a dry inert liquid organic solvent and then passing dry chlorine through the resulting liquid reaction medium, at 50°
- to 130°
C. and under the influence of ultra violet light whereby the 3-methyl group of the 3-methylpyridine is trichlorinated and chlorine is also introduced into the 2-position so as to give 2-chloro-5-trichloromethylpyridine as the major product. - View Dependent Claims (2)
- to 130°
Specification
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Current AssigneeZeneca Incorporated (Astrazeneca PLC)
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Original AssigneeImperial Chemical Industries Limited (Nouryon BV)
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InventorsCartwright, David
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Primary Examiner(s)Schwartz, Richard A.
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Application NumberUS06/181,876Time in Patent Office594 DaysField of Search204/158 HA, 546/345US Class Current204/157.71CPC Class CodesA01N 43/40 six-membered ringsC07D 213/61 Halogen atoms or nitro radi...C07D 213/643 2-Phenoxypyridines; Derivat...C07D 213/73 Unsubstituted amino or imin...
