HCID 178418361, compound → HCID 178481040, compound

Participants

Reaction Steps

0.746 g of 6-chloro-3-{1-[4-(4-methyl-1-piperazinyl-carbonyl)phenylamino]-1-(4-amino-3-nitrophenyl)methylene}-2-indolinone are hydrogenated in 30 ml acetic acid with the addition of 0.60 g Raney nickel under 50 psi of hydrogen pressure for 4 hours. After the addition of another 0.30 g of Raney nickel hydrogenation is continued under the same conditions for a further 4 hours, then the catalyst is removed by suction filtering. The residue obtained from the filtrate by distilling off the solvent is dissolved in water, the solution is made alkaline with soda solution. The crude product precipitated is suction filtered, washed with water, dried, dissolved in 70 ml of dichloromethane/methanol/ammonia solution=70:30:3 and filtered through a layer of silica gel. The filtrate is concentrated by evaporation, the residue is stirred with 5 ml of ethyl acetate, suction filtered and dried at 80° C.

Provenance & Evidence