(3-Isopropoxy-4-nitrophenyl)(1-methylpiperidin-4-yl)amine → 2-isopropoxy-N4-(1-methylpiperidin-4-yl)benzene-1,4-diamine

Participants

Reaction Steps

A mixture of 1.49 g of (3-isopropoxy-4-nitrophenyl)(1-methylpiperidin-4-yl)amine and 150 mg of 10% palladium-on-carbon in 60 ml of ethanol is hydrogenated at 25° C. under 1 bar for 3 h. The mixture is filtered on Clarcel and the Clarcel is rinsed with ethanol. The filtrate is concentrated to dryness under reduced pressure and the residue is purified by chromatography on a 70 g silica cartridge, elution being carried out with a 96.5/3/0.5 v/v/v dichloromethane/methanol/28% aqueous ammonia mixture at a flow rate of 50 ml/min, so as to obtain 0.9 g of 2-isopropoxy-N4-(1-methylpiperidin-4-yl)benzene-1,4-diamine in the form of a brown liquid.

Provenance & Evidence