如果按照规定使用和存储,则不会分解,没有已知的危险反应,请避免接触氧化剂。
化学性质
这是一种无色透明的液体。其熔点为-24℃,沸点为252-255℃(99.7kPa),相对密度为0.9945(20/4℃),折光率为1.4305。该物质能溶于乙醇、乙醚和乙酸乙酯,但不溶于水。
用途
主要用于有机合成。
生产方法
通过在浓硫酸存在下使庚二酸与无水乙醇进行酯化反应而制得。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
5-氯戊酸乙酯 | ethyl 5-chloropentanoate | 2323-81-1 | C7H13ClO2 | 164.632 |
庚二酸 | heptanedioic acid | 111-16-0 | C7H12O4 | 160.17 |
—— | 4-hydroxyimino-heptanedioic acid diethyl ester | 34999-74-1 | C11H19NO5 | 245.276 |
4-碘-丁酸乙酯 | ethyl 4-iodobutyrate | 7425-53-8 | C6H11IO2 | 242.057 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
庚二酸氢乙酯 | 7-ethoxy-7-oxoheptanoic acid | 33018-91-6 | C9H16O4 | 188.224 |
6-(氯甲酸基)己炔羧酸乙酯 | ethyl 6-(chloroformyl)hexanoate | 14794-32-2 | C9H15ClO3 | 206.669 |
2,6-二溴庚二酸二乙酯 | diethyl 2,6-dibromoheptanedioate | 868-68-8 | C11H18Br2O4 | 374.07 |
—— | ethyl (8E,10Z)-7,12-dioxooctadeca-8,10-dienoate | 122947-36-8 | C20H32O4 | 336.472 |
—— | ostopanic acid ethyl ester | 122947-35-7 | C20H32O4 | 336.472 |
The diformylation of the dinitriles 4 and diesters 7 with the Bredereck-Simchen reagent HC[N(CH3)2]2[OC(CH3)3] (1) under microwave irradiation give the bis-enamines 6 and 8 with dramatically reduced reaction times and improved yields compared to conventional heating. The condensation products formed can be easily converted to bis-pyrazole and bis-isoxazole derivatives 13 and 20, respectively. Methyl anthranilate reacts on prolonged heating with the orthoamide 21 to give ketene aminal 23 in low yield (8 %). Under microwave irradiation the same reagents lead to a mixture of 23 (14 %) and dihydropyrane 24 (28 %).