反応 #2486276

反応方程式

hydrogen

1,5-dinitro naphthalene

water

charcoal

hydrogen

→

1,5-diamino naphthalene

溶媒

aniline

反応条件

後処理

1. 1
   その他was carried out at 50° C.
2. 2
   その他The catalyst was separated off by filtration at 80° C.
3. 3
   その他the aniline subsequently removed by water-vapour distillation
4. 4
   ろ過the precipitated crystallate filtered off
5. 5
   その他dried

実験手順

60 g (0.275 mol) of 1,5-dinitro naphthalene were suspended, in a 700 ml stirrer autoclave, in 340 ml of aniline and treated with 18 g of water-moist, 1%-strength catalyst of platinum and activated charcoal corresponding to 8 g of dry catalyst. Hydrogenation was carried out at 50° C. and a hydrogen pressure of 10 bars, as was described in Example 1. The hydrogen uptake was finished after 2 hours. The catalyst was separated off by filtration at 80° C. and the aniline subsequently removed by water-vapour distillation. The distillation residue was cooled to 18° C. and the precipitated crystallate filtered off and dried. In this way 40 g (92% of the theory) of 1,5-diamino naphthalene of m.p. 188°-189° C. were obtained.

出典