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Preparation of New Compounds Compound 5 Indium powder (67 mg, 0.58 mmol) and 3-bromo-3,3-difluoropropene (70 μL, 0.72 mmol) were added sequentially to a solution of 4 (94 mg, 0.45 mmol) in DMF (3 mL, The mixture was then sonicated for 3 h. After evaporation of DMF under reduced pressure, sat. aq NaHCO3 soln and EtOAc were added. The two layers were separated, and the aqueous layer was further extracted with EtOAc. The combined organic layers were dried (Na2SO4, filtered, and concentrated to give a residue, which was chromatographed (EtOAc-PE, 1:5) to afford 5 (100 mg, 78, as a colorless oil: 1H NMR (300 MHz, CDCl3, δ, 1.16 (t, J, 9.2 Hz, 3 H, 1.27 (t, J, 9.9 Hz, 3 H, 3.36-3.50 (m, 2 H, 3.54-3.65 (m, 1 H, 3.74-3.82 (m, 1 H, 4.99 (d, J, 9.6 Hz, 1 H, 5.36-5.45 (m, 1 H, 5.49 (d, J, 11.1 Hz, 1 H, 5.61-5.69 (m, 1 H, 5.88 (s, 1 H, 5.92-6.02 (m, 1 H, 7.31 dd
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3 soln and the mixture was extracted with EtOAc.
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