| 摘要 |
NEW MATERIAL:The compound of formula I (R<1> and R<2> are H, halogen, lower alkyl, lower alkoxy, nitro, cyano, lower alkoxycarbonyl, lower dialkylamino, or lower haloalkyl, or R<1> abd R<2> may together form an aromatic ring). EXAMPLE:2,3-Dicyano-pyrido[1',2':1,2]imidazo[4,5-b]pyrazine. USE:Pharmaceuticals, agricultural chemicals or their synthetic intermediates. PREPARATION:The compound of formula I can be produced by reacting the compound of formula II with 2-amino-3-chloro-5,6-dicyanopyrazine in a solvent such as benzene, dioxane, etc., or in the absence of solvent at 10-80 deg.C.
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