反应详情

1-Ethyllepidinium iodide (3.0 g., 10 mmole) and 1-chloro-2,6-dinitrobenzene (2.5 g., 12 mmole) are warmed in acetonitrile (50 ml.) and diisopropylethylamine (2.6 g., 20 mmole) is added. The resulting dark mixture is allowed to cool and stand overnight. The precipitate of dye is filtered off and washed with acetonitrile and ether. On recrystallization from acetonitrile, a 25% yield (0.85 g.) of purified dye is obtained with a m.p. of 154°-155° C. dec.

1. temperatureto cool
2. filtrationThe precipitate of dye is filtered off
3. washwashed with acetonitrile and ether
4. customOn recrystallization from acetonitrile
5. customa 25% yield (0.85 g.) of purified dye is obtained with a m.p. of 154°-155° C. dec.