HRID279680
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
PROCEDURE
实验过程
4-(2-Hydroxyethyl)phenylcarbamic acid tert-butyl ester (1.03 g; 4.34 mmole) and 2-ethoxy-3-(4-hydroxyphenyl)propanoic acid ethyl ester (1.03 g; 4.34 mmole) were dissolved in dichloromethane under argon at room temperature. Azodicarbonyl dipiperidine (1.65 g, 6.5 mmole) and thereafter triphenylphosphine (1.37 g; 5.2 mmole) were added. After stirring at room temperature for 6 hours the solvent was evaporated in vacuo. Purification by chromatography on silica gel using heptane ethyl acetate (2:1) as eluant gave 1.78 g (yield 89%) of 3-{4-[2-(4-tert-butoxycarbonylaminophenyl)ethoxy]-phenyl}-2-ethoxypropanoic acid ethyl ester.
WORKUP
后处理
- customwas evaporated in vacuo
- customPurification by chromatography on silica gel