Acetic Anhydride → 1,5-Diacetyl-3-(ethoxy-phenyl-methylidene)-2-indolinone

참여 물질

반응 단계

32.6 g (150 mmol) 1,5-diacetyl-2-indolinone are suspended in 100 ml triethyl orthobenzoate and stirred overnight with 150 ml acetic anhydride at 110° C. Then a further 50 ml triethyl orthobenzoate are added and the mixture is stirred for a further 24 h. Then it is evaporated down and the resulting precipitate is suction filtered, washed and dried.

출처 및 근거