反应详情

A mixture of 1.72 g (3.84 mmol) of (E)-3-[2-[5-[(5-oxo-2-(2-propenyl)-5,6,7,8-tetrahydro-1-naphthalenyl)oxy]pentyloxy]phenyl]-2-propenoic acid methyl ester from the preceding experiment, 0.1 g of 10% palladium of carbon, and 50 mL of ethyl acetate was stirred in an atmosphere of hydrogen until gas uptake ceased. The catalyst was filtered with suction on a pad of Celite and the filter cake was washed thoroughly with ethyl acetate. Concentration of the combined filtrate and washes under reduced pressure gave a yellow oil which was chromatographed on 50 g of silica gel. Elution with 4:1 hexane-ether afforded 1.35 g (78%) of 2-[5-[(5-oxo-2-propyl-5,6,7,8-tetrahydro-1-naphthalenyl)oxy]pentyloxy]benzenepropanoic acid methyl ester as a pale-yellow oil.

1. filtrationThe catalyst was filtered with suction on a pad of Celite
2. washthe filter cake was washed thoroughly with ethyl acetate
3. customConcentration of the combined filtrate and washes under reduced pressure gave a yellow oil which
4. customwas chromatographed on 50 g of silica gel
5. washElution with 4:1 hexane-ether