反应详情

16 g. of N-(2'-hydroxy-5'-nitrophenyl)-2-hydroxy-5-nitrobenzylamine was dissolved in 150 ml. of methanol. After addition of 2 g. of palladium/C as catalyst, the catalytic reduction was effected for about 3 hours. The precipitated crystals were dissolved in concentrated hydrochloric acid and filtered. The filtrate was concentrated, charged with 100 ml. of an alcohol and heated for 2 hours to obtain the end product in the form of white crystals. The melting point of the end product was 200°-240° C. (decomp.), and the yield was 12 g.

1. additionAfter addition of 2 g
2. filtrationfiltered
3. concentrationThe filtrate was concentrated
4. additioncharged with 100 ml
5. temperatureof an alcohol and heated for 2 hours
6. customto obtain the end product in the form of white crystals