反应详情

A mixture of 1.37 g (4 mmol) of (E)-3-[2-[[5-[(methylsulfonyl)oxy]pentyl]oxy]phenyl]-2-propenoic acid methyl ester from example 76, 0.81 g (4 mmol) of 5-oxo-2-(2-propenyl)-5,6,7,8-tetrahydro-1-naphthalenol, 0.8 g (5.8 mmol) of anhydrous, granular potassium carbonate, 0.08 mL of TDA-1, and 25 mL of toluene was stirred under reflux for 5.5 hr and at room temperature for 12 hr. After being treated with 0.3 g of additional potassium carbonate, the mixture was stirred and refluxed for a further 24 hr. The mixture was cooled and diluted with ether. The organic phase was washed with water and saturated brine and work-up was completed in the usual manner giving a brown oil. This material was chromatographed on 50 g of silica gel. Elution with 1:1 hexane-ether afforded 1.72 g (96%) 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 as a yellow-orange oil.

1. stirringthe mixture was stirred
2. temperaturerefluxed for a further 24 hr
3. temperatureThe mixture was cooled
4. washThe organic phase was washed with water and saturated brine
5. customgiving a brown oil
6. customThis material was chromatographed on 50 g of silica gel
7. washElution with 1:1 hexane-ether