Hexamethylene tetramine (HMTA) on reaction with beta-diketo compounds (ethyl acetoacetate, acetylacetone and dimedone) yielded corresponding dihydropyridine derivatives in the aqueous medium. The formation of these tautomeric analogues has been established on the basis of spectroscopic and chromatographic evidence.
A EHSAN ,M YOUNUS ,S S ALI ,C M ASHRAF ,
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