I[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[CH:4][CH:3]=1.[CH3:11][C:12]1([CH3:23])[C:16](C)(C)OB(C=C(C)C)O1.C(=O)(O)[O-].[Na+].ClCCl>O1CCOCC1.O.CC(=O)OCC>[C:12]([C:3]1[CH:4]=[C:5]([N+:8]([O-:10])=[O:9])[CH:6]=[CH:7][C:2]=1[CH:11]=[C:12]([CH3:23])[CH3:16])([CH3:23])([CH3:16])[CH3:11]
A mixture of 1-iodo-4-nitrobenzene (2.49 g, 10.0 mmol), 4,4,5,5-tetramethyl-2-(2-methylprop-1-enyl)-1,3,2-dioxaborolane (1.82 g, 10.0 mmol), sodium bicarbonate (2.52 g, 30.0 mmol) and [1,1-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (816 mg, 1.0 mmol) in dioxane/water (5:1, 60 mL) was stirred at 90° C. for 20 h under N2. LCMS and TLC monitored the reaction was completed. The reaction mixture was cooled to RT and concentrated. The residue was dissolved in 100 mL of EtOAc, washed with water (150 mL×3) and brine, dried over Na2SO4, filtered and concentrated under vacuo. The crude product was purified by silica gel column, eluting with PE:EA (6:1), to obtain the desired product (1.9 g, 100% yield) as a yellow oil, 1H-NMR (400 MHz, CDCl3) δ ppm 8.17 (d, 2H, J=8.8 Hz), 7.35 (d, 2H, J=8.8 Hz), 6.36 (s, 1H), 1.96 (d, 3H, J=0.4 Hz), 1.90 (d, 3H, J=0.4 Hz).
Wird geladen…
