To a solution of N-[2-(2-fluorophenyl)ethyl]-N-[4-(3-undecyl-1,2,4-oxadiazol-5-yl)benzyl]amine (45.1 mg, 0.1 mmol) in anhydrous DCM (0.6 mL) was added the morpholinomethyl polystyrene resin (Novabiochem, HL, 39.5 mg, 0.15 mmol, 3.8 mmol/g) and the resulting mixture was cooled at 0° C. Ethyloxalyl chloride (4.7 mg, 0.13 mmol) in anhydrous DCM (0.4 mL) was added. The reaction mixture was stirred for 2 h at rt, then the PL-AMS-Resin (Polymer Laboratories, 52 mg, 0.1 mmol, 1.93 mmol/g) was added and the mixture stirred for 1.5 h. The resins were filtered off, washed with DCM, and the filtrates were concentrated under vacuum to afford the title compound as an oil.
