反应详情

温度

130 °C

16.0 g of 5,6-dimethoxy-2-indolinone (according to Hahn; Tulus; Chem. Ber. 74, 500 (1941)) are dissolved in 170 ml of acetic anhydride and stirred for more than 3 hours at 130° C. After cooling the residue is filtered off, washed with ether and dried in vacuo at 100° C.

1. temperatureAfter cooling the residue
2. filtrationis filtered off
3. washwashed with ether
4. customdried in vacuo at 100° C.