反应详情

To a suspension of 1.12 g (4.34 mmol) of 4-(5-trifluoromethyl-1,2,4-oxadiazol-3-yl)-2,6-dimethylphenol, 0.87 g (1.2 eq) of 2-chloro-5-(3-hydroxypropyl)-pyridine, 1.4 g (1.2 eq) of triphenylphosphine in 50 ml of methylene chloride under nitrogen at 0° C. was added dropwise a solution of 0.86 g (1.2 eq) of DEAD in 5 ml of methylene chloride. The mixture was stirred under nitrogen at room temperature for 60 h, concentrated in vacuo and the residue was triturated with hexane/ethyl acetate, filtered, and the filtrate was concentrated in vacuo to yield a dark brown oil. The brown oil was purified by MPLC (50 id, Kieselgel 60 column, hexane/ethyl acetate, 3:1) to afford 1.4 g (78%) of 2-chloro-5-[3-[4-(5-trifluoromethyl-1,2,4-oxadiazol-3-yl)-2,6-dimethylphenoxy]-propyl]-pyridine, as a white crystalline solid, m.p. 89°-91° C.

1. concentrationconcentrated in vacuo
2. customthe residue was triturated with hexane/ethyl acetate
3. filtrationfiltered
4. concentrationthe filtrate was concentrated in vacuo
5. customto yield a dark brown oil
6. customThe brown oil was purified by MPLC (50 id, Kieselgel 60 column, hexane/ethyl acetate, 3:1)