反应详情

温度

10 °C

A mechanically stirred mixture of 550.6 g (1.88 mol) of 1,4-dichloro-5-hydroxy-9,10-anthracenedione (1), 413.4 g (2.14 mol) of anhydrous cesium carbonate, 444 g, (2.4 mol) of 2,4,6-trimethylbenzyl chloride, 7.06 l of acetone, and 2.31 l of N,N-dimethylformamide was heated at reflux for 23 hr. During this period, additional portions of 2,4,6-trimethylbenzyl chloride (2.5 hr, 31.7 g; 6.5 hr, 63.4 g; 20 hr, 31.7 g) and one portion of cesium carbonate (20 hr, 4.8 g) were added. The mixture was cooled to 10° C. The precipitate was collected by filtration, washed successively with hot water and methanol, then dried at 7-9 mm/50° C./20 hr to leave 621 g (78%) of 11, mp 216°-218° C., 97.9% pure by HPLC.

1. temperaturewas heated
2. temperatureat reflux for 23 hr
3. waitDuring this period
4. filtrationThe precipitate was collected by filtration
5. washwashed successively with hot water and methanol
6. customdried at 7-9 mm/50° C./20 hr