反应详情

To 3-amino-2-naphthoic acid (15 g, 66.8 mmol) in conc. HCl (100 ml) and water (100 ml) at 0° C. was added NaNO2 (9.22 g, 69 mmol) in 1 g portions while maintaing the reaction temperature below 0° C. After 30 min below 0° C., SnCl2.H2O (75 g) was added in portions over 20 min. The ice bath was removed and stirred at ambient temperature for 1 h. Reaction was filtered and the filter cake washed with water and air dried. The crude material containing tin (II) salts was used as is and gave a mp>300° C.

1. customthe reaction temperature below 0° C
2. customThe ice bath was removed
3. customReaction
4. filtrationwas filtered
5. washthe filter cake washed with water and air
6. customdried
7. additionThe crude material containing tin (II) salts
8. customgave a mp>300° C.