New Fused Nitrogen-Rich Heterocycles from 5,6-Dichloropyrazine-2,3-dicarbonitrile
In the easily accessible 5,6-dichloropyrazine-2,3-dicarbonitrile (1) the chlorine atoms can be readily exchanged by amines yielding the new pyrazinedicarbonitriles 2-5, which upon treatment with hydrazine hydrate form the nitrogen-rich heterocycles 6-9.
Ried, Walter,Tsiotis, Georgios
p. 1197 - 1200
(2007/10/02)
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