反应详情

2-Hexyloxy-3-(4-hydroxyphenyl)propanoic acid methyl ester (0.33 g, 1.19 mmole) and 2-(4-methanesulfonyloxyphenyl)ethanol (0.2578 g; 1.19 mmole) was dissolved in dichloromethane (5 ml) under argon. Azodicarbonyl dipiperidine (0.451 g; 1.789 mmole) was added followed by addition of triphenylphosphine (0.375 g; 1.423 mmole). The reaction mixture was stirred at room temperature and after 2 hours more dichloromethane (2 ml) was added. The reaction mixture was stirred for another 18 hours and then filtered. The filtrate was washed with water, sodium hydrogen carbonate solution, diluted potassium hydrogen sulfate solution and brine, dried with sodium sulfate and evaporated. Chromatography of the residue on silica gel using heptane:ethyl acetat (2:1 to 1:1) as eluant gave 0.381 g (67% yield) of 2-hexyloxy-3-[4-(2-{4-methanesulfonyloxyphenyl}-ethoxy)phenyl]propanoic acid methyl ester.

1. additionwas added
2. filtrationfiltered
3. washThe filtrate was washed with water, sodium hydrogen carbonate solution, diluted potassium hydrogen sulfate solution and brine
4. dry with materialdried with sodium sulfate
5. customevaporated