反应详情

温度

0 °C

A solution of 2.74 g of NaNO2 in 28 ml of water is added over 30 minutes to a solution, cooled to −5° C., of 5 g of 3-amino-4-methylbenzoic acid in 120 ml of concentrated HCl and 40 ml AcOH, and the mixture is left stirring for 1 hour 20 minutes at 0° C. After cooling to −10° C., a solution of 27.6 g of SnCl2.2H2O in 28 ml of concentrated HCl is added slowly. After stirring for 1 hour at RT, filtration, washing of the precipitate with 5 ml of 1N HCl and drying over P2O5 under vacuum, 6.15 g of the expected product are obtained.

1. waitthe mixture is left
2. temperatureAfter cooling to −10° C.
3. stirringAfter stirring for 1 hour at RT
4. filtrationfiltration
5. washwashing of the precipitate with 5 ml of 1N HCl
6. dry with materialdrying over P2O5 under vacuum, 6.15 g of the expected product
7. customare obtained