Carbon tetrabromide → Methyl 1-({4-ethyl-5-[5-(4-phenoxyphenyl)-1,2,4-oxadiazol-3-yl]-2-thienyl}methyl)azetidine-3-carboxylate

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Reaction Steps

The crude product of the title compound was synthesized by conducting the reaction similar to that mentioned in Example 1 (1f) using {4-ethyl-5-[5-(4-phenoxyphenyl)-1,2,4-oxadiazol-3-yl]-2-thienyl}methanol (0.17 g, 0.44 mmol) that was obtained in Example 13 (13a), carbon tetrabromide (0.19 g, 0.57 mmol), triphenylphosphine (0.15 g, 0.57 mmol), methyl 3-azetidinecarboxylate hydrochloride (0.10 g, 0.66 mmol), and N,N-diisopropylethylamine (0.23 mL, 1.3 mmol). Subsequently, the crude product of the title compound thus obtained was purified by chromatography on a silica gel column using a mixed solvent of ethyl acetate and hexane (1:3 to 1:2) as the eluent to afford the title compound (0.19 g) in a yield of 89% as a pale yellow oily product.

Provenance & Evidence