1-[1-(Isopropylthio)ethyl]-2-nitrobenzene → 2-[1-(Isopropylthio)ethyl]aniline

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Reaction Steps

44 g (0.188 mol) 1-[1-(isopropylthio)ethyl]-2-nitrobenzene (VII-1) are dissolved in 250 ml ethanol, mixed with 3 g Raney nickel and hydrogenated in the autoclave for 6 hours at room temperature with 3 bar of hydrogen. After 6 hours another 3 g Raney nickel are added and hydrogenation is continued for another 16 hours at room temperature with 3 bar hydrogen. The catalyst is then removed by filtration and the solvent removed under vacuum. The crude product is purified by column chromatography (silica gel, 3:1 hexane/methyl t-butyl ether). 32 g (97.3% purity by HPLC, 84.4% theoretical yield) of 2-[1-(isopropylthio)ethyl]aniline are obtained as a yellow oil [logP (pH 2.3)=2.45].

Provenance & Evidence