N,N,N',N'-Tetramethylazodicarboxamide → 2-Methyl-2-(2-methyl-4-{2-[2-methyl-6-(4-trifluoromethyl-phenyl)-pyridin-3-yl]-ethoxy]-phenoxy)-propionic acid ethyl ester

Participants

Reaction Steps

0.181 g (0.642 mmol) of the above prepared 2-[2-methyl-6-(4-trifluoromethyl-phenyl)-pyridin-3-yl]-ethanol and 0.153 g (0.642 mmol) of 2-(4-hydroxy-2-methyl-phenoxy)-2-methyl-propionic acid ethyl ester (described in WO 02/092590) were dissolved in 8 ml of abs. THF and treated successively at 0° C. with 0.156 g (0.771 mmol) of tributylphosphine and 0.133 g (0.770 mmol) of N,N,N′,N′-tetramethylazodicarboxamide. The cooling bath was then removed and stirring continued for one night. Filtration over a pad of Celite, evaporation of the solvent, followed by flash chromatography (SiO2, hexane/AcOEt=85/15), delivered 0.070 g of the title compound as colorless oil.

Provenance & Evidence