Reaktion #53037

Reaktionsgleichung

(Z)-3-[1-(4-aminophenylamino)-1-phenyl-methylidene]-2-indolinone

ethyl formate

→

(Z)-3-[1-(4-formylamino-phenylamino)-1-phenyl-methylidene]-2-indolinone

Lösungsmittel

DMF

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeAfter removal of the solvent in vacuo ethyl acetate
2. 2
   workup.ADDITIONis added
3. 3
   Einengenthe mixture is again concentrated by evaporation
4. 4
   Filtrationfiltered
5. 5
   Sonstigedried

Vorschrift

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.

Quelle