Abstract
The reaction of 5-amino-1H -imidazoles
with 3-methoxalylchromone provided a set of imidazo[4,5-b ]pyridines (1-desazapurines)
bearing the CO2 Me substituent at the α-position
of the pyridine core. The corresponding acids were synthesized by
subsequent hydrolysis of the ester function. Being typical purine
isosteres, 1-desazapurines are considered to be potent
pharmacophores, and are widely used in drug design and medicinal
chemistry.
Key words
3-methoxalylchromone - 5-aminoimidazoles - imidazo[4,5-b ]pyridines - 1-desazapurines - cyclocondensations
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Crystallographic data (excluding structure
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