| 摘要 |
<p>PURPOSE:To obtain the title compound safely in high yield, by bringing easily available methyl-pyrazine into conact with ammonia and air as assistant raw materials in the presence of a specific catalyst. CONSTITUTION:Methylpyrazine (P) is heated to form the gas, which is brought into contact with ammonia and air or an atmosphere comprising them, in the presence of a catalyst consisting of vanadium and molybdenum oxides (V) and (M), preferably at a weight ratio of (V) to (M) of preferably 0.3-1.5:1, more preferably 0.75-1.3:1, at 300-480 deg.C, preferably 350-410 deg.C, to give the title compound. Preferably, the flow ratio of (P):(V):(M) is 7-13g:2000-3500:230-300cc per cc of the catalyst.</p> |
