Procedure for producing 2-aminopyridines from 2- pyridine...

Details Procedure for producing 2-aminopyridines from 2- pyridine... Procedure for producing 2-aminopyridines from 2- pyridine...

C - Chemistry, Metallurgy

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31/1, 260/295

C07D 213/73 (2006.01) C07D 213/79 (2006.01) C07D 213/80 (2006.01)

Patent

CA 1217191

PROCEDURE FOR PRODUCING 2-AMINOPYRIDINES FROM 2-PYRIDINE CARBOXYLIC ACID-N-OXIDES ABSTRACT OF THE INVENTION Procedure for producing 2-aminopyridines having general formula: Image from 2-pyridine carboxylic acid-N-oxides having the formula: Image wherein R is H or a -COOH group or an alkyl group having C1 to C8 or an aryl group, and n is a number between 1 and 4. The 2-pyridine carboxylic acid-N-oxide is converted with a lower aliphatic carboxylic acid anhydride and a tertiary amine in the presence of a carboxylic acid nitrile. The conversion product is hydrolysed to the 2-aminopyridine compound.

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