Triethylsilane → 4-Methoxy(4-bromo-benzyl)-benzene

To a solution of the product from step 1 (0.5 g, 1.6 mmol) in TFA (1 mL) was added triethylsilane (0.5 mL, 25 mmol) at 0° C. The resulting mixture was allowed to warm to rt and stir at rt for 16 h. The mixture was poured onto 30 mL ice-water solution, neutralized with aq NaOH (2N) to pH=6-7, and then extracted with EtOAc (2×20 mL). The combined organic layers were washed with water (5×20 mL) and brine (20 mL). and dried over anhy. Na2SO4. The solvent was removed in vacuo to obtain the crude product which was purified by silica gel flash chromatography to afford the title product (0.45 g, 85%) as a solid; 1H NMR (400 MHz, CDCl3); δ 3.78 (s, 3H), 3.87 (s, 2H), 6.82 (d, J=8.8, 2H), 7.04 (d, J=8.8, 2H), 7.07 (d, J=8.8, 2H), 7.98 (d, J=8.4, 2H).

1. extractionextracted with EtOAc (2×20 mL)
2. washThe combined organic layers were washed with water (5×20 mL) and brine (20 mL)
3. customand dried over anhy
4. customThe solvent was removed in vacuo
5. customto obtain the crude product which
6. customwas purified by silica gel flash chromatography

ORD-Eintrag

ord-8b56f401018e47cba67a82a3d599670c

Quelldatensatz

uspto-grants-2008_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07402684B2