5-(3-Iodophenyl)-3-methyl-1,2,4-oxadiazole → (S)-methyl-3-(3-cyclopentyloxy-4-methoxyphenyl)-5-[3-(3-methyl[1,2,4]oxadiazol-5-yl)phenyl]pent-4ynoate

Participants

Reaction Steps

A solution of (R)-methyl-3-(3-cyclopentyloxy-4-methoxyphenyl)-3-ethynylpropionate (150 mg, 0.5 mmol) and 3-(3-methyl[1,2,4]oxadiazol-5-yl) iodobenzene (144 mg, 0.5 mmol) in Et3N (4 ml) was treated with tetrakis(triphenylphosphine)palladium(0) (10 mg) and copper(I)iodide (10 mg). The reaction was heated to 55° for 30 min, and then the solvent was thoroughly evaporated. The residue was purified by flash chromatography (silica gel CH2Cl2 :hexane:Et2O/10:10:1) and gave the titled compound as an oil (73 mg, 17%) 1H NMR (400 MHz, CDCl3) δ 8.18 (s, 1 H), 8.02 (m, 1 H), 7.60 (m, 1 H), 7.60 (t, 1 H), 6.95 (m, 2 H), 6.86 (d, 1 H), 4.80 (m, 1 H), 4.33 (t, 1 H), 3.84 (s, 3 H), 3.72 (s, 3 H), 2.92 (d of d, 1 H), 2.82 (d of d, 1 H), 2.48 (s, 3 H), 1.78-2.02 (m, 6 H), 1.62 (m, 2 H).

Provenance & Evidence