Piperazine → HCID 86711932, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(1-(3-bromobenzyl)-5-methyl-1H-1,2,4-triazol-3-yl)-3-(4-(trifluoromethoxy)phenyl)-1,2,4-oxadiazole (Example 11, Step 1; 500 mg, 1.04 mmol) in toluene (10 mL) were added piperazine (86 mg, 1.04 mmol), t-BuONa (290 mg, 3 mmol), Ruphos (46 mg, 0.1 mmol) and Pd2(dba)3 (90 mg, 0.1 mmol). The reaction mixture was then heated in a sealed vial at 110° C. under inert atmosphere for 12 h. The resulting mixture was cooled, diluted with H2O (30 mL) and extracted with EtOAc (2×20 mL). The combined organic layers were washed with H2O (10 mL) and brine (10 mL), dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by silica gel chromatography (PE:EA=3:1 to 1:1) to give the title compound as a white solid; MS (ES+) C23H22F3N7O2 requires: 485. found: 486 [M+H]+; 1H NMR (500 MHz, DMSO-d6) δ 8.78 (br s, 1H), 8.22 (d, J=9 Hz, 2H), 7.61 (d, J=9 Hz, 2H), 7.27 (m, 1H), 6.97 (m, 2H), 6.76 (d, J=7.5 Hz, 1H), 5.50 (s, 2H), 3.32 (m, 2H), 3.23 (m, 4H), 2.58 (s, 3H), 2.50 (m, 2H).

Provenance & Evidence