| 摘要 |
According to the present invention, there is provided a process for preparing pyrazines characterized in that a diol represented by the formula <IMAGE> wherein R1 and R2 are each a hydrogen atom or a hydrocarbon radical, and a diamine represented by the formula <IMAGE> wherein R3 and R4 are each a hydrogen atom or a hydrocarbon radical, are subjected to a gas phase contact reaction in the presence of a zinc-containing catalyst.
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