To a stirred solution of 1-allyl-2-[3-(2,4-dichlorophenyl)-2-thienyl]-1H-imidazole (3.40 g, 10.1 mmol) in THF (80 mL) was added dropwise 2.50 M of n-butyllithium in Hexane (4.46 mL, 11.2 mmol) at −78° C. and the resulting solution was stirred for 30 min. A solution of tributyltin chloride (3.44 mL, 12.7 mmol) in THF (40.0 mL) was added dropwise into the cold solution and then the resulting mixture was stirred for 1 hr at −78° C. The reaction mixture was quenched by addition of water (150 ml) and the resulting mixture was extracted with EtOAc (200 ml×3). The combined organic layers were washed with brine, dried using Na2SO4, filtered and concentrated in vacuo. The residue was purified by column chromatography (SiO2, elution with 0-20% EtOAc in hexanes) to provide 3.5 g of product as a yellowish oil (71%). LC/MS (FA) ES+ 625. 1H NMR (400 MHz, d6 DMSO) δ: 7.67 (d, J=2.0 Hz, 1H), 7.34 (dd, J=2.0, 8.3 Hz, 1H), 7.24 (t, J=10.5 Hz, 1H), 7.12 (d, J=1.2 Hz, 1H), 7.07 (d, J=8.3 Hz, 1H), 6.97 (d, J=1.2 Hz, 1H), 5.46-5.57 (m, 1H), 4.98 (dd, J=1.5, 10.2 Hz, 1H), 4.79 (dd, J=1.5, 17.1 Hz, 1H), 4.18-4.22 (m, 2H), 1.44-1.68 (m, 6H), 1.25-1.36 (m, 6H), 1.04-1.23 (m, 6H), 0.82-0.89 (m, 9H).
