烯丙基丙二酸二乙酯是一种有机中间体,可由丙二酸二乙酯与烯丙基溴反应得到。有文献报道其可用于制备一种中华按蚊用杀虫剂。
制备过程 在氮气气氛下,向500 mL三颈圆底烧瓶中加入20 g 丙二酸二乙酯、43 g 无水碳酸钾和200 mL 无水CH₃CN。将反应混合物在室温搅拌10分钟后,在室温下缓慢加入23 g 烯丙基溴。随后,将反应混合物加热至80℃并保持24小时。冷却后,通过硅藻土床过滤,并用乙腈(100 mL)洗涤硅藻土床。合并滤液并浓缩得到24 g 烯丙基丙二酸二乙酯,为无色液体。
用途 烯丙基丙二酸二乙酯可用作医药原料和农药中间体。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | triethyl pent-4-ene-1,2,2-tricarboxylate | 16515-85-8 | C13H20O6 | 272.298 |
二烯丙基丙二酸二乙酯 | Diethyl diallylmalonate | 3195-24-2 | C13H20O4 | 240.299 |
—— | diethyl 2-allyl-2-bromomalonate | 78331-59-6 | C10H15BrO4 | 279.131 |
烯丙基丙二酸 | allylmalonic acid | 2583-25-7 | C6H8O4 | 144.127 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 2-(ethoxycarbonyl)pent-4-enoic acid | 2985-38-8 | C8H12O4 | 172.181 |
—— | (E)-diethyl (but-2-en-1-yl)malonate | 84200-37-3 | C11H18O4 | 214.262 |
—— | diisopropyl 2-allylmalonate | —— | C12H20O4 | 228.288 |
(3-甲基丁-2-烯基)丙二酸二乙酯 | diethyl (3-methylbut-2-enyl)malonate | 22539-80-6 | C12H20O4 | 228.288 |
—— | diethyl 2-[3-cyano-2-propenyl]malonate | —— | C11H15NO4 | 225.244 |
—— | diethyl 2-[(E)-3-cyano-2-propenyl]malonate | —— | C11H15NO4 | 225.244 |
—— | diethyl 2-[(E)-3-cyano-2-propenyl]malonate | —— | C11H15NO4 | 225.244 |
2-烯丙基-2-甲基丙二酸二乙酯 | diethyl allylmethylmalonate | 53651-72-2 | C11H18O4 | 214.262 |
—— | 2-(2-methyl-allyl)-malonic acid diethyl ester | 1575-67-3 | C11H18O4 | 214.262 |
—— | (E)-1,1-diethyl 4-methyl but-3-ene-1,1,4-tricarboxylate | 579503-43-8 | C12H18O6 | 258.271 |
A convenient synthesis of DL-hydroxy-ornithine is described. Starting from diethyl allylmalonate, it involves treatment with sulphuryl chloride followed by hydrolysis and distillation to give a 90% yield of 2,5-dichloro-4-valerolactone. Condensation of this with two equivalents of potassium phthalimide in dimethyl-formamide gives a quantitative yield of crude 2,5-diphthalimido-4-valerolactone. This lactone is converted quantitatively by acid hydrolysis to DL-γ-hydroxyornithine, isolated as the dihydrochloride of the corresponding 2,5-diamino-4-valerolactone. The over-all yield calculated from allyl chloride is 80%.