Cesium carbonate → 5-(1-(imidazo[1,2-a]pyridin-2-ylmethyl)-5-methyl-1H-1,2,4-triazol-3-yl)-3-(4-(trifluoromethoxy)phenyl)-1,2,4-oxadiazole

Participants

Reaction Steps

To a solution of 5-(5-methyl-1H-1,2,4-triazol-3-yl)-3-(4-(trifluoromethoxy)phenyl)-1,2,4-oxadiazole (31 mg, 0.1 mmol) in DMSO (0.5 mL), Cs2CO3 (65 mg, 0.2 mmol) and 2-(chloromethyl)imidazo[1,2-a]pyridine (18 mg, 0.11 mmol) were added at RT. The mixture was stirred at RT overnight. The resulting crude product was purified by pre-HPLC (Mobile phase: A=0.01% TFA/H2O, B=0.01% TFA/MeCN; Gradient: B=10%-50% in 20 min; Column: C18) and then a silica gel column with (EtOAc/Hexane 16% to 100% EtOAc) to give 5-(1-(imidazo[1,2-a]pyridin-2-ylmethyl)-5-methyl-1H-1,2,4-triazol-3-yl)-3-(4-(trifluoromethoxy)phenyl)-1,2,4-oxadiazole as a white solid (4 mg, 10%). MS (ES+) C20H14F3N7O2 requires: 441. found: 442 [M+H]+; 1H NMR (600 MHz, DMSO-d6) δ 8.53 (d, J=6.8 Hz, 1H), 8.21 (d, J=8.8 Hz, 2H), 8.01 (s, 1H), 7.61 (d, J=8.5 Hz, 2H), 7.51 (d, J=9.1 Hz, 1H), 7.26 (dd, J=7.5, 8.2 Hz, 1H), 6.91 (t, J=6.8 Hz, 1H), 5.66 (s, 2H), 2.69 (s, 3H).

Provenance & Evidence