反应详情

温度

210 °C

The same reactor as used in Example 7 was adopted. In this reactor, a solution of 120 g of maleic anhydride in 360 g of tetrahydronaphthalene was placed. Then, a solution of 220 g of dodecylamine and 1760 g of tetrahydronaphthalene was added thereto at 40° C. over a period of 120 minutes. After the addition was completed, the resultant mixture and 65.4 g of ortho-phosphoric acid (purity 89% by weight), 1.344 g of methoxybenzoquinone, and 0.1 g of zinc acetate added thereto were heated at 210° C. for one hour to effect reaction. Thereafter, the resultant reaction mixture was cooled to 30° C. and separated into a water layer and a tetrahydronaphthalene layer. The tetrahydronaphthalene layer was distilled to expel tetrahydronaphthalene. Consequently, there was obtained 285 g of slightly impure N-dodecyl maleimide. It was found to have purity of 92.3% by weight, indicating the yield thereof to be 83.5 mol % based on dodecylamine.

1. additionAfter the addition
2. customreaction
3. customThereafter, the resultant reaction mixture
4. temperaturewas cooled to 30° C.
5. customseparated into a water layer
6. distillationThe tetrahydronaphthalene layer was distilled