Trimethoxysilane → 4,5-Dimethoxy-2-nitrobenzyl 6-(trimethoxysilyl)hexyl ether

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A 20-ml eggplant type flask was purged with nitrogen, and charged with 2.95 g (10.0 mmol) of 5-hexenyl 4,5-dimethoxy-2-nitrobenzyl ether, 1.47 g (12 mmol) of trimethoxysilane, and an infinitesimal amount of hydrogen hexachloroplatinate(IV) hexahydrate (H2PtCl6·6H2O), followed by stirring at 37° C. for 30 minutes. Thereafter, the bath temperature was raised to 100° C., and the reaction was completed in 2 hours. The reaction mixture was purified by silica gel column chromatography using a medium-pressure column. Using a mixture of hexane, ethyl acetate and tetramethoxysilane (in a volume ratio of 100:20:1) as the eluent, 1.4 g (3.35 mmol) of the desired product was obtained in a 34% yield. Its Rf value (for the aforesaid eluent) was 0.1.

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