HRID542237
反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
CONDITIONS
反应条件
- 温度
- -5 °C
PROCEDURE
实验过程
20 g (0.07 moles) of 2-(4-acetylaminobenzoyloxy)ethyl acetylacetate, 8.41 g (0.07 moles) of ethyl 3-aminocrotonate and 9.84 g (0.07 moles) of 3-nitrobenzaldehyde are heated under reflux in 65 ml of ethanol for 8 hours. The solvent is then evaporated, 15 ml of boiling methanol are added to the residue, the solution is discoloured with activated charcoal and cooled to -5° C. to obtain 2-(4-acetylaminobenzoyloxy)ethyl 2,6-dimethyl-5-ethoxycarbonyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylate with half a molecule of ethanol as yellow crystals melting--after recrystallisation in ethanol--at 157°-162° C. The yield is 46% of the theoretical yield.
WORKUP
后处理
- customThe solvent is then evaporated
- addition15 ml of boiling methanol are added to the residue