Methanol → 2-(4-Bromo-1-methoxynaphthalen-2-yl-methyl)benzo[b]thiophene

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Reaction Steps

In a nitrogen stream, triethylsilane (2.48 ml, 15.5 mmol) and a boron trifluoride-diethyl ether complex (1.08 ml, 8.54 mmol) were added dropwise to a solution of benzo[b]thiophen-2-yl-(4-bromo-1-methoxynaphthalen-2-yl)methanol (3.1 g, 7.76 mmol) in methylene chloride (60 ml) at 0° C. and the reaction mixture was stirred at room temperature for two hours, and then a 50% methanol aqueous solution (1 ml) was added and furthermore water (30 ml) was added thereto. The resulting mixture was extracted with methylene chloride, and the organic layer was washed with a saturated sodium chloride aqueous solution and dried (anhydrous magnesium sulfate), and then the solvent was distilled under reduced pressure. The obtained residue was purified by silica gel column chromatography [developing solution=ethyl acetate:n-hexane (1:50)] to obtain the title compound (2.38 g, 80%).

Provenance & Evidence