反应详情

200 mg (0.6 mmol) of (Z)-3-[1-(4-aminophenylamino)-1-phenyl-methylidene]-2-indolinone and 5 ml of ethyl formate are stirred in 2.5 ml of DMF for 60 hours at 90° C. After removal of the solvent in vacuo ethyl acetate is added and the mixture is again concentrated by evaporation. The residue is stirred with ether, suction filtered and dried.

1. customAfter removal of the solvent in vacuo ethyl acetate
2. additionis added
3. concentrationthe mixture is again concentrated by evaporation
4. filtrationfiltered
5. customdried