Benzoyl chloride → 1-Ethyl-5-benzoyloxindole

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a mixture of 26.18 g. (186 mmoles) of benzoyl chloride and 32.95 g. of aluminum chloride in 30 ml. of nitrobenzene was gradually added 10.0 g. (62.1 mmoles) of 1-ethyloxindole. The reaction mixture was heated to 100° C. for one hour, cooled and added to 2 l. of ice-water with stirring. The mixture was extracted with methylene chloride (5×200 ml.) and the extracts dried over magnesium sulfate and concentrated in vacuo. The nitrobenzene was distilled from the residue under high vacuum and the residue treated with diethyl ether to induce crystallization. The resulting solids were filtered and recrystallized from methylene chloride petroleum ether, 7.05 g. (42.8% yield), m.p. 134°-136° C.

Herkunft & Nachweise