1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → HCID 178437945, compound

Participants

Reaction Conditions

Reaction Steps

To a round-bottom flask was added a solution of 4-(2-methylpiperidin-4-yl)benzonitrile (compound 176.3, 210 mg, 0.940 mmol, 1.00 equiv, 90%) in N,N-dimethylformamide (2 mL). EDC.HCl (404 mg, 2.11 mmol, 2.00 equiv), 4-dimethylaminopyridine (257 mg, 2.10 mmol, 2.00 equiv), and 4-cyclobutyl-5-(5-ethyl-4H-1,2,4-triazol-3-yl)-2-methylbenzoic acid (compound 176.4, 300 mg, 1.05 mmol, 1.00 equiv) were added to the reaction mixture. The resulting solution was stirred for 4 h at 25° C., then diluted with 50 mL of ethyl acetate. The resulting mixture was washed with 2×30 mL of NH4Cl (aq., sat.) and 2×30 mL of brine, dried over anhydrous sodium sulfate, and concentrated in vacuo. The residue was purified using silica gel column chromatography with dichloromethane/methanol (20:1) as eluent. The crude product (˜20 mg) was further purified by Prep-HPLC with the following conditions (1#-Pre-HPLC-001(SHIMADZU)): Column, SunFire Prep C18, 19*150 mm 5 um; mobile phase, water with 0.05% TFA and CH3CN (48% CH3CN up to 49% in 8 min, up to 100% in 3 min, down to 48% in 2 min); Detector, Waters 2489 254&220 nm. The fractions containing pure compound were combined and lyophilized to yield 3.8 mg (1%) of the title compound as a white solid. m/z (ES+) 468 (M+H)+.

Provenance & Evidence