5,6-Dichloronicotinic acid is a compound that can be synthesized by reacting methyl ketones with chloroacetic acid. It is used in the synthesis of maleic anhydride and has been shown to inhibit the catalysis of acetylcholine chloride. It has also been shown to have an inhibitory effect on Alzheimer's disease. The kinetic mechanism for this inhibition occurs through the hydrolysis step of 5,6-Dichloronicotinic acid by magnesium chloride in hexane solution. The reactive acylation reaction proceeds when it reacts with acetic anhydride in the presence of pyridine.