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发明公开
CN106831408A 一种2,8-二甲基壬二酸、其合成方法及应用 有权

一种2,8-二甲基壬二酸、其合成方法及应用
摘要：
本发明公开了一种 2,8- 二甲基壬二酸、其合成方法和应用，以 2,8- 壬二酮和α - 卤代乙酸乙酯为原料，在强碱性条件下进行 Darzens 缩合反应，得到 3,9- 二甲基 - α , β - 环氧十一碳二酸二乙酯， 3,9- 二甲基 - α , β - 环氧十一碳二酸二乙酯经过皂化、酸析反应得到 3,9- 二甲基 - α , β - 环氧十一碳二元酸， 3,9- 二甲基 - α , β - 环氧十一碳二元酸经过脱羧反应得到 2,8- 二甲基壬二醛， 2,8- 二甲基壬二醛经过氧化反应得到 2,8- 二甲基壬二酸，再经过纯化得到电容级产品。本发明的合成方法工艺简单，产品纯度高，适合工业化生产。
摘要（英）：

The invention discloses a 2, 8-dimethyl nonandioic acid, a synthetic method and the application. With 2, 8-nonanedione and alpha-halogeneated ethyl acetate as raw materials, Darzens condensation reaction is carried out under a strong alkaline condition to obtain 3, 9-dimethyl-alpha, beta-epoxy diethyl undecanedioate; the 3, 9-dimethyl-alpha, beta-epoxy diethyl undecanedioate is saponified and acidified to obtain 3, 9-dimethyl-alpha, beta-epoxy undecanedioic acid; the 3, 9-dimethyl-alpha, beta-epoxy undecanedioic acid is decarboxylated to obtain 2, 8-dimethyl nonanedial; the 2, 8-dimethyl nonanedial is oxidized to obtain 2, 8-dimethyl nonandioic acid; the 2, 8-dimethyl nonandioic acid is purified to obtain a capacitor grade product. The synthetic method disclosed by the invention has the advantages of simple process and high product purity and is suitable for industrial production.

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