Under the acid free condition, 3 acetyl 2 hydroxy 6 methyl pyran 4 one (8) was obtained and its structure was confirmed by X ray diffraction analysis.

• 在没有酸催化的条件下,反应生成3乙酰基2羟基6甲基-吡喃4酮(8),并通过单晶X射线衍射分析确定了产物的结构;