2-(Di-tert-butylphosphino)biphenyl → 3-({5-Methyl-7-[3-(trifluoromethyl)phenyl]imidazo[5,1-f][1,2,4]triazin-2-yl}amino)benzenesulfonamide

Participants

Reaction Steps

A mechanical mixture of 5-methyl-7-[3-(trifluoromethyl)phenyl]imidazo[5,1-f][1,2,4]triazin-2-amine (Intermediate 45) (0.025 g, 0.09 mmol), 3-bromobenzenesulfonamide (0.02 g, 0.09 mmol), Pd2(dba)3 (0.008 g, 0.01 mmol), 2-(Di-t-butylphosphino)biphenyl (0.008 g, 0.03 mmol), and NaOtBu (0.011 g, 0.11 mmol) in 1,4-dioxane (1 mL) was irradiated with microwave radiation for 1000 seconds at a temperature of 150° C. Filtration of the resultant through celite, followed by concentration and purification by preparative HPLC gave 3-({5-methyl-7-[3-(trifluoromethyl)phenyl]imidazo[5,1-f][1,2,4]triazin-2-yl}amino)benzenesulfonamide (0.008 g) as a yellow solid. 1H NMR (Acetone-d6): δ9.19 (s, 1H), 8.98-8.93 (m, 1H), 8.81 (bs, 1H), 8.42-8.37 (m, 1H), 8.10-8.05 (m, 1H), 7.95-7.90(m, 1H), 7.81-7.75 (m, 1H), 7.67-7.50 (m, 2H), 6.63 (bs, 1H), 2.60 (s, 3H). MS m/z 449 (M+1).

Provenance & Evidence