5-Nitroisatin

Isatin 30 (14.7 g, 0.1 mol) was added to conc. H2SO4 (121 ml)  cooled to 0 ºC in an ice-salt bath. Fuming HNO3 (4.2 ml) was  added to this, drop by drop, in such a way that temperature should  not rise above 5 ºC. The reaction mixture was allowed to stand for  about 30 minutes and then poured over crushed ice (500 g). A yellow precipitate separated  immediately. The 5-Nitroisatin was filtered and washed with water and air dried to a constant  weight (15 g).  Yield : 85%

orange-yellow to orange crystalline powder

Reactant for preparation of:

• Potential antibacterial and antifungal agents
• spiro[indole-thiazolidinones] as a medicinally important scaffold
• Potential antimycobacterial agents
• Anticonvulsant agents
• Inhibitors of human transglutaminase 2
• Anthelmintic agents
• Anti-human immunodeficiency virus (HIV) agents
• Antimicrobial agents
• Potential antitubercular agents
• Inhibitors of acetylcholinesterase

ChEBI: 5-Nitroisatin is a member of indoles. It has a role as an anticoronaviral agent.