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The above allyl alcohol (810 mg, 2.0 mmol), methyl (4-hydroxy-2-methylphenoxy)acetate (431 mg, 2.2 mmol; example 2) and triphenylphosphine (630 mg, 2.4 mmol) were dissolved in a mixture of anhydrous toluene (32 mL) and tetrahydrofuran (12 mL). The mixture was cooled to 0° C., kept under nitrogen and a degassed solution of diisopropyl azodicarboxylate (0.47 mL, 2.4 mmol) in anhydrous tetrahydrofuran (4 mL) was added dropwise during 10 min. The reaction mixture was allowed to warm up to ambient temperature with the bath and then was stirred for 48 h. The solvents were evaporated in vacuo and the residue was submitted to flash column chromatography (silica gel Fluka 60, hexanes/ethyl acetate 85:15) affording methyl (Z)-[4-[3-(4-iodophenyl)-3-(4-trifluoromethylphenyl)allyloxy]-2-methylphenoxy]acetate as solidifying yellow oil.

1. temperatureto warm up to ambient temperature with the bath
2. customThe solvents were evaporated in vacuo