1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 59559649, compound

Participants

Reaction Steps

DIPEA (131 mg, 0.17 mL, 0.76 mmol) was added to a stirred solution of 4-Benzyloxy-benzoic acid (58 mg, 0.25 mmol) in DMF (2 mL). HOBT (41 mg, 0.3 mmol) and EDCI (58 mg, 0.3 mmol) were then added at room temperature. After 2 minutes, 2-amino-1-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-propan-1-one (85 mg, 0.25 mmol) was added and the resulting mixture was stirred at room temperature overnight. Cold water was then added and the product was extracted with EtOAc and the organic layer was washed with brine. The organic phase was dried over Na2SO4 and concentrated under reduced pressure to get the residue. The obtained residue was purified by column chromatography (using 60-120 silica gel and 10% MeOH in CHCl3 as eluent) to afford 65 mg (47% yield) of 4-benzyloxy-N-{1-methyl-2-oxo-2-[4-(2-trifluoromethyl-benzoyl)-piperazin-1-yl]-ethyl}-benzamide. LCMS Purity: 95%. 1H NMR (CDCl3): δ 7.76 (m, 3H), 7.6 (m, 2H), 7.4-7.3 (m, 5H), 7.1 (d, 1H), 7.0 (d, 2H), 5.22 (s, 2H), 4.2 (d, 1H), 3.82 (m, 2H), 3.7-3.4.(m, 6H), 2.0 (m, 1H), 1.4 (dd, 3H).

Provenance & Evidence