反应详情

Cyclisation of 4-(p-tolylamino)-1,2,3-triazole-5-carboxylic acid (1 g) with 85% polyphosphoric acid (12 g) at 100° C. over 2 hrs. gave 0.66 g (72%) of the title compound of mp (EtOH-DMF-H2O) 310° C.; νmax (mull) 2720 (br.) 1655, 1600 cm-1, Δ (DMSO) 2.42 (3H, s); 7.58 (2H, s); 8.10 (1H,s), 1 low fieled broad (exchangeable). (Found; C, 59.89; H, 4.37; N, 28.09; C10H8N4O2 requires; C, 59.99 H, 4.03; N, 27.99%).