Ap. Shawcross et Sp. Stanforth, PREPARATION OF SOME SUBSTITUTED IMIDAZO[1,2-A]PYRIDINE DERIVATIVES, Journal of heterocyclic chemistry, 30(2), 1993, pp. 563-565
2-Bromopyridine derivatives 2a-2c were prepared. Compounds 2b and 2c a
nd ammonia yielded aminopyridines 3b and 3c which were converted to im
idazo[1,2-a]pyridine derivatives 4b and 4c. Compound 4b was nitrated g
iving the analogue 5b of metronidazole 1.