反应详情

To a cooled mixture of 1.81 g (10 mmol) 4-chloro phthalimide in 20 mL ethanol (96%) was added 0.5 mL (10 mmol) hydrazine monohydrate. The reaction mixture was stirred for 2 min. at room temperature and 2 min. at reflux. By adding 50 mL cold water pale yellow crystals formed after 1 h. Resulting crystals was filtered and recrystallized from ethanol to give 0.4 g (20%)4-chloro-N-amino-phthalimide :top 172°-175° C.; 1H NMR (200 MHz, DMSO-d6) d 4.90 (s, 2H, NH2), 7.82-7.92 (m, 3H, C6H3); it solidifies after melting and melts again around 345° C.

1. temperatureat reflux
2. customformed after 1 h
3. customResulting crystals
4. filtrationwas filtered
5. customrecrystallized from ethanol