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Synthesis of Alkene 15 Reagent 14 (14 mg, 44 μmol) was dissolved in THF (1 mL) and cooled to 0°C Then, NaH (2.5 mg, 62 μmol, 60% dispersion on mineral oil) was added, the solution stirred for 15 min at 0°C, and then cooled to -78°C Aldehyde 13 (27 mg, 49 μmol) was added and the mixture was warmed over 2 h to 0°C and then quenched with sat. NH4Cl solution (5 mL, The layers were separated and the aqueous layer was extracted with EtOAc (3 x 5 mL, The combined organic layers were washed with brine (1 x 10 mL) and dried over MgSO4. The solvent was removed under reduced pressure and the residue was purified via flash chromatography. The reaction yielded 21 mg of the Z-olefin (0.03 mmol, 69, Rf, 0.29 (EtOAc-hexane, 1:30, α] D23 +6.5 (c 1.07, CHCl3, 1H NMR (400 MHz, CDCl3, δ, 7.29 (d, J, 8.5 Hz, 2 H, 6.87 d
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4. The solvent was removed under reduced pressure and the residue was purified via flash chromatography. The reaction yielded 21 mg of the Z-olefin(...)
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