反应详情

A mixture of 500 mg (3.72 mmol) of 2-propenylphenol (E/Z mixture), prepared by Claisen rearrangement of phenylallylether followed by double bond isomerisation, 1.02 g of potassium carbonate (0.74 mmol) and 745 mg of rac. methyl 2-bromopropionate (4.46 mmol) and 10 ml of dimethylformamide was stirred overnight at RT and then for 4 hours at 80° C. The reaction mixture was then added to 40 ml of water and extracted three times with 30 ml diethyl ether. The organic phase was washed with 5% sodium hydroxide solution, separated off, dried with Na2SO4 and concentrated by evaporation. 685 mg (83.6% of theory) of virtually pure methyl 2-(2-propenyl-phenyloxy)propionate were obtained.

1. waitfor 4 hours at 80° C
2. extractionextracted three times with 30 ml diethyl ether
3. washThe organic phase was washed with 5% sodium hydroxide solution
4. customseparated off
5. dry with materialdried with Na2SO4
6. concentrationconcentrated by evaporation