反应详情

温度

0 °C

2.1 g (14.3 mmol) 3-amino-5-chloro-phenol are dissolved in 20 ml of conc. hydrochloric acid and 20 ml of water and cooled to 0° C. 1.0 g (15.0 mmol) sodium nitrite in 4 ml of water are added. Then a solution of 12.1 g (53.5 mmol) tin(II)-chloride in 16 ml hydrochloric acid is slowly added dropwise at −5° C. It is stirred for 1 hour at 0° C., then adjusted to pH7 with sodium hydrogen carbonate. The precipitate formed is suction filtered and washed with water. The filtrate is extracted with diethyl ether. The organic phase is dried and evaporated to dryness. The residue is extracted with hexane.

1. customThe precipitate formed
2. filtrationfiltered
3. washwashed with water
4. extractionThe filtrate is extracted with diethyl ether
5. customThe organic phase is dried
6. customevaporated to dryness
7. extractionThe residue is extracted with hexane