反应详情

To a solution of 1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-benzo[d]imidazole (6.06 g) in THF (50 mL) was added LiHMDS (1 M solution in THF, 30 ml) dropwise at 0° C. After stirring for 1 h, a solution of N-methoxy-N-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide (7.10 g) in THF (50 mL) was added dropwise, and the mixture was stirred for 1 h at 0° C. The reaction mixture was poured into water and extracted with AcOEt. The extract was washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/AcOEt) and crystallized from hexane to give the title compound (6.20 g). 1H NMR (300 MHz, CDCl3) δ −0.11 (9H, s), 0.84-0.91 (2H, m), 1.37 (12H, s), 3.55-3.62 (2H, m), 6.03 (2H, s), 7.37-7.43 (1H, m), 7.45-7.50 (1H, m), 7.65-7.70 (1H, m), 7.91-7.98 (3H, m), 8.22-8.26 (2H, m).

1. stirringthe mixture was stirred for 1 h at 0° C
2. extractionextracted with AcOEt
3. washThe extract was washed with brine
4. dry with materialdried over MgSO4
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by silica gel column chromatography (hexane/AcOEt)
7. customcrystallized from hexane