Y. Blache et al., REACTION OF 1-ETHOXALYLMETHYLPYRIDO[2, 3-B]PYRAZINIUM BROMIDE WITH AMMONIUM ACETATE - SYNTHESIS OF IMIDAZO[1',2' 1,2]PYRIDO[5,6-B] PYRAZINES/, Heterocycles, 38(2), 1994, pp. 283-289
The synthesis of somes imidazo[1',2':1,2]pyrido[5,6-b]pyrazines by tre
atment of quaternary salts of pyrido[2,3-b]pyrazines with ammonium ace
tate in acetic acid media is described.