Synthesis 3, 5-dihydroxytoluene by ethyl acetoacetate and diketene as material ( yield 6%), by 3-methyl-4-chlorophenol and KOH as material (yield 30-40%) respectively, It was solved for product separation and purify.

• 分别以乙酰乙酸乙酯与双乙烯酮为原料(收率6%25)、3-甲基-4-氯苯酚与氢氧化钾为原料(收率30-40%25)合成了3，5-二羟基甲苯，解决了产品分离纯化问题。