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
- 50 °C
PROCEDURE
实验过程
40 mg (1 mmol) of sodium hydroxide are added to a solution of 531 mg (1 mmol) of ethyl 2-[1-[2-butoxy-3′-(3-heptyl-1-methylureido)biphenyl-4-yl]meth-(E)-ylidene]butyrate in 1 mL of ethanol and 10 mL of tetrahydrofuran. The reaction mixture is heated at 50° C. for 48 hours. The reaction medium is evaporated to dryness, taken up in water, acidified with aqueous 2 N hydrochloric acid solution and extracted with ethyl acetate. The organic phases are combined, washed with water and dried over magnesium sulfate. After filtration, the solvent is evaporated off and the oil obtained is purified by chromatography on a column of silica eluted with a 60/40 heptane/ethyl acetate mixture and then precipitated from heptane. 317 mg (76%) of 2-[1-[2-butoxy-3′-(3-heptyl-1-methylureido)biphenyl-4-yl]meth-(E)-ylidene]butyric acid are obtained in the form of a white powder with a melting point of 62-64° C.
WORKUP
后处理
- customThe reaction medium is evaporated to dryness
- extractionextracted with ethyl acetate
- washwashed with water
- dry with materialdried over magnesium sulfate
- filtrationAfter filtration
- customthe solvent is evaporated off
- customthe oil obtained
- customis purified by chromatography on a column of silica
- washeluted with a 60/40 heptane/ethyl acetate mixture
- customprecipitated from heptane