反应详情

A solution of 16.0 g of 2-t-butyl-5-[(1E)-3-(t-butyldimethylsilyloxy)-propenyl]-1-nitrobenzene [prepared as described in step (iv) above] in 800 ml of diethyl ether was stirred at room temperature for 3 hours in the presence of 8.0 g of 10% palladium-on-charcoal under a stream of hydrogen. At the end of this time, the reaction mixture was filtered and the filtrate was freed from the solvent by distillation under reduced pressure . The residue was purified by column chromatography through silica gel, using a 1:10 by volume mixture of ethyl acetate and hexane as the eluent, to give 12.5 g of the title compound as an oily substance.

1. filtrationAt the end of this time, the reaction mixture was filtered
2. distillationthe filtrate was freed from the solvent by distillation under reduced pressure
3. customThe residue was purified by column chromatography through silica gel
4. additionby volume mixture of ethyl acetate and hexane as the eluent