Triethylsilane → Ethyl 2-(4-benzyloxyphenyl)-4,5,6,7-tetramethoxy-2-indancarboxylate

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Reaction Steps

Trifluoroacetic acid (30 ml) was added to ethyl 2-(4-benzyloxyphenyl)-1-hydroxy-4,5,6,7-tetramethoxy-2-indancarboxylate (3.02 g, 5.94 mmols) with cooling with ice, and then triethylsilane (3.80 ml, 23.8 mmols) was added thereto at room temperature. The reaction mixture was stirred for 30 minutes, and then concentrated in vacuo. The residue was diluted with ethyl acetate, and the organic layer was washed with a saturated aqueous sodium bicarbonate solution, water and a saturated aqueous sodium chloride solution, and then dried. The solvent was evaporated out, and the resulting crude product was purified by silica gel column chromatography (hexane:ethyl acetate=10:1 to 8:1) to obtain the entitled compound (1.73 g) as an oil.

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