反应详情

Hydrogen was introduced into a mixture of 4.0 g of benzyl N-(2-t-butyldimethylsilyloxy-1-methylethyl)-carbamate (prepared as described in Preparation 8), 0.80 g of 10% w/w palladium-on-carbon and 40 ml of ethanol for 1 hour. At the end of this time, the atmosphere was replaced by nitrogen, the palladium-on-carbon was removed by filtration from the reaction mixture, and the filtrate was concentrated by evaporation under reduced pressure, to give 1.88 g of the title compound having an Rf value of 0.27 (on silica gel thin layer chromatography, using a 1:3 by volume mixture of ethyl acetate and hexane as the developing solvent).

1. customthe palladium-on-carbon was removed by filtration from the reaction mixture
2. concentrationthe filtrate was concentrated by evaporation under reduced pressure