Facile bromination of the benzene ring during the cyclisation of the 1H-3-methyl-4-ethoxycarbonyl-5-arylidenehydrazonopyrazoles to the 3-substituted-aryl-1H-6-methyl-7-ethoxycarbonyl--pyrazolo[3,2-c]-s-triazoles - Csunderlik, Carol; Bercean, Vasile; Peter, Francisc; Badea, Valentin (ARKIVOC, 2002)
doi: 10.3998/ark.5550190.0003.214