反应详情

温度

2.5 °C

2.4 g of 4-amino-1-naphthalenecarboxylic acid hydrochloride are mixed at 0° C. with 80 ml of concentrated HCl. A solution of 0.89 g of sodium nitrite in 19 ml of water is added and the mixture is left stirring for 2 hours at 2-3° C. It is cooled to -10° C., and a solution of 9.7 g of stannous chloride dihydrate in 90 ml of concentrated HCl is added slowly. The temperature is allowed to rise to RT and the mixture is kept stirring for 30 minutes. 200 ml of water are added, the mixture is left stirring for 30 minutes and the solid formed is drained. The solid is taken up in MeCN, drained, washed with ether and dried. 2.2 g of the expected product are obtained, m.p.=190° C.

1. waitthe mixture is left
2. temperatureIt is cooled to -10° C.
3. customto rise to RT
4. stirringthe mixture is kept stirring for 30 minutes
5. waitthe mixture is left
6. stirringstirring for 30 minutes
7. customthe solid formed
8. washwashed with ether
9. customdried