methaqualone

Anthranilic acid method 7 g of anthranilic acid, 5 ml of o-toluidine and 4 ml of glacial acetic acid were mixed in a round-bottom flask. 40-50 g of polyphosphoric acid was slowly added to this mixture, and the mixture was heated for 20-30 minutes to 140-160 ° C. After that, the mixture was...