反応 #50096

反応方程式

1,4-dihydroxyanthraquinone

sodium dithionite

sodium hydroxide

ammonia

→

1-amino-4-hydroxyanthraquinone

収率 90.7%

溶媒

water

反応条件

後処理

1. 1
   その他giving rise to an autogenous pressure of 2.5 bar
2. 2
   温度cooled down
3. 3
   ろ過The precipitate found was filtered off with suction
4. 4
   洗浄washed salt-free with water
5. 5
   その他dried

実験手順

79.5 g of 1,4-dihydroxyanthraquinone, 210 ml of water, 5.6 g of sodium dithionite, 60 g of 50% strength by weight sodium hydroxide solution and 240 g of 25% strength by weight ammonia solution were introduced into a pressure-resistant apparatus. The apparatus was then sealed pressure-tight and its contents were heated to 100° C., giving rise to an autogenous pressure of 2.5 bar. The reaction mixture was held under these conditions for 3 h, then cooled down and depressurized. The precipitate found was filtered off with suction, washed salt-free with water and dried to leave 74.9 g of 1-amino-4-hydroxyanthraquinone (purity according to GC: 90.7%).

出典