反应详情

温度

0 °C

The above allyl alcohol (0.889 g, 3.0 mmol), methyl (4-hydroxy-2-methylphenoxy)acetate (0.770 g, 3.9 mmol; see below) and triphenylphosphine (1.30 g, 5 mmol) were dissolved in a mixture of anhydrous toluene (12 mL) and tetrahydrofuran (4 mL). The mixture was cooled to 0° C., kept under nitrogen and diisopropyl azodicarboxylate (0.85 g, 4.2 mmol) was added dropwise. The reaction mixture was stirred at 0° C. for 3 h and then at 25° C. for 16 h. The solvents were evaporated in vacuo and the residue was submitted to column chromatography (silica gel Fluka 60, hexanes/ethyl acetate 98:2-90:10) affording methyl (E)-[4-[3-(4-bromophenyl)-3-phenylallyloxy]-2-methylphenoxy]acetate.

1. waitat 25° C. for 16 h
2. customThe solvents were evaporated in vacuo