Pyridinecarboxylic acid chlorides from (trichloromethyl)pyridine

Details Pyridinecarboxylic acid chlorides from (trichloromethyl)pyridine Pyridinecarboxylic acid chlorides from (trichloromethyl)pyridine

1991-09-12

1992-11-24

Ivy, C. Warren

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546315, 546316, 546318, 546323, 546327, C07D21355, C07D21354, C07D21326

Patent

active

051663520

ABSTRACT:
Pyridinecarboxylic acids and their acid chloride, aliphatic ester and alkylamide derivatives are prepared by passing vapors of a (trichloromethyl)pyridine compound, such as 2,3-dichloro-5-(trichloromethyl)pyridine over gamma-alumina at a temperature of about 250.degree. C. to 450.degree. C. to obtain a pyridinecarboxylic acid chloride compound, such as 2,3-dichloronicotinoyl chloride and, if desired, subsequently converting this compound to its acid, an ester, or an amide, such as 2,3-dichloronicotinic acid, methyl 2,3-dichloronicotinate, or N-methyl-2,3-dichloronicotinamide, by treatment with water, an aliphatic alcohol, or ammonia or an alkylamine, respectively.

REFERENCES:
patent: 3317549 (1967-05-01), Johnston
patent: 4587116 (1986-05-01), Livingston et al.

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