1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → 4-(1-(3-(4-Methoxy-1H-pyrazol-5-yl)-4-methylbenzoyl)azetidin-3-yl)benzonitrile

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Reaction Steps

Into a 25-mL round-bottom flask, was placed a solution of 3-(4-methoxy-1H-pyrazol-5-yl)-4-methylbenzoic acid (compound 244.7, 60 mg, 0.26 mmol) in N,N-dimethylformamide (2 mL). 4-(Azetidin-3-yl)benzonitrile hydrochloride (75 mg, 0.39 mmol), EDC.HCl (99 mg, 0.52 mmol), and 4-dimethylaminopyridine (63 mg, 0.52 mmol) were added and the solution was stirred for 2 h at room temperature. The reaction was diluted with EtOAc (30 mL) and washed with brine (3×15 mL), dried (Na2SO4), filtered and concentrated under reduced pressure. The crude product (150 mg) was purified by Prep-HPLC with the following conditions (1#-Pre-HPLC-010(Waters)): Column, SunFire Prep C18 OBD Column, 5 μm, 19*150 mm; mobile phase, water with 0.05% TFA and CH3CN (35.0% CH3CN up to 50.0% in 10 min, up to 100% in 1 min, down to 35.0% in 2 min); Detector, UV 254 & 220 nm. The fractions contained pure product were combined and lyophilized to obtain the title compound as an off-white solid (44.3 mg, 46%). m/z (ES+) 373 (M+H+).

Provenance & Evidence