Hydrogen chloride-ethyl acetate → HCID 178507732, compound

Participants

Reaction Conditions

Reaction Steps

1.7 g (4 mmol) of (Z)-3-[1-(4-tert.butoxycarbonylamino-phenylamino)-1-phenyl-methylidene]-2-indolinone are suspended in 15 ml of dichloromethane and after the addition of 35 ml of ethyl acetate/hydrogen chloride for 18 hours at ambient temperature and stirred for 2 hours at 40° C. After cooling the mixture is diluted with ether and the precipitate is suction filtered. The residue is divided between sodium chloride solution and methylene chloride, the organic extracts are dried and concentrated by evaporation.

Provenance & Evidence