Sodium hydride → 9-bromo-8-methoxy-6-methyl-5-((2-(trimethylsilyl)ethoxy)methyl)thieno[2,3-c]quinolin-4(5H)-one

Participants

Reaction Steps

To a suspension of 9-bromo-8-methoxy-6-methylthieno[2,3-c]quinolin-4(5H)-one (2.2 g, 6.8 mmol) in a mixture of DMF (15 mL) and THF (15 mL) at 0° C. was added sodium hydride (60%, 0.54 g, 13.6 mmol). The reaction mixture was stirred at 0° C. for 30 min before (2-(chloromethoxy)ethyl)trimethylsilane (3.4 g, 20 mmol) was added. The resulting mixture was stirred at rt overnight and then poured into ice-water (50 mL). The resulting precipitate was filtered and purified by column chromatography (silica, heptane/ethyl acetate) to afford the desired product (2.7 g, 87%) as a light yellow solid: ESI MS m/z 454 [C19H24BrNO3SSi+H]+.

Provenance & Evidence