4,7-Dibromo[1,2,5]thiadiazolo[3,4-c]pyridine → HCID 89286639, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4,7-dibromo-pyridal[2,1,3]thiadiazole (0.28 g, 0.95 mmol) and 1b (1.14 g, 0.95 mmol) in freshly distilled toluene (10 ml) was added Pd(PPh3)4 (109.8 mg, 0.095 mmol) under nitrogen, and then capped with a rubber septum. The reaction mixture was stirred at 75° C. for 10 hours. The solvent was removed and purified by column chromatography (silica was pretreated by 10 v/v % triethylamine/hexane solution) with hexane as eluent. The column separation was run for 3 times to give 268 mg of viscous purple oil, with yield of 25%. 1H NMR (500 MHz, CDCl3) δ (ppm): 8.92 (s, 1H), 8.49 (s, 1H), 7.39 (s, 1H), 2.21 (m, 4H), 1.77 (m, 6H), 1.54-1.25 (m, 68H), 1.12-1.01 (m, 15H). 13C NMR (125 MHz, CD2Cl2) δ (ppm): 163.10, 160.00, 156.32, 148.09, 147.92, 145.93, 144.00, 142.24, 141.83, 140.28, 129.79, 127.62, 106.17, 53.53, 37.86, 31.92, 29.97, 29.66, 29.63, 29.59, 29.54, 29.42, 29.39, 29.35, 29.32, 29.29, 29.02, 28.99, 27.21, 24.58, 22.69, 22.65, 13.88, 13.45, 10.96.

Provenance & Evidence