Diisopropylethylamine → HCID 58576291, compound

Participants

Reaction Steps

3-{4-[4-(4-Trifluoromethyl-benzyloxy)-phenyl]-piperazin-1-yl}-propionic acid lithium salt (41 mg; 0.10 mmol, prepared in accordance with Example 37), diisopropylethyl amine (35 μL; 0.20 mmol) and tetramethyl-O-(1H-benzotriazol-1-yl)uronium hexafluorophosphate (38 mg; 0.10 mmol) are diluted in a 2 to 1 mixture of dimethylformamide and tetrahydrofuran (1.5 mL) and the resulting solution is stirred for 5 minutes. A solution of 4-(3-methoxy-4-nitro-phenoxy)-piperidine hydrochloride (32 mg; 0.11 mmol) in dimethylformamide (0.5 mL) is added and the reaction is then stirred for 4 hours at room temperature. Following dilution with dichloromethane (10 mL), the organic layer is sequentially washed with water (5 mL), aq. sat. sodium hydrogen carbonate (3×5 mL), is dried over magnesium sulfate and concentrated under reduced pressure. The residue obtained is finally purified by preparative HPLC to deliver the desired product in pure form (17 mg; 0.03 mmol). The structure was confirmed using Protocol I-B. Calculated mass=643; observed mass=643; HPLC retention time=4.66 min.

Provenance & Evidence