中文摘要：

为填补国内市场空白，以乙酰乙酸乙酯，钠为原料；通过关环、脱氢等反应，高产率地合成了3，6-二甲基哒嗪．该方法步骤短，收率高，是合成3，6-二甲基哒嗪的一种简捷方法．

英文摘要：

In order to resolve the problem which 3,6--dimethylpyridazine can＇t be bought from domestic market, we prepare this compound by three steps from CH3COCH2COOCH2CH3 via cyclization with hydrazine hydrate and dehydrogenation reactions. The synthetic route is a excellent method to 3, 6--dimethylpyridazine. Its structure was characterized by^1 H NMR and MS--ESI.