Isopropyl iodide → HCID 68289197, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(1-(5-(1,4,5,6,7,8-hexahydroimidazo[4,5-d]azepin-2-yl)-2,4-dimethylbenzoyl)piperidin-4-yl)benzonitrile trifluoroacetate (429.5, 80.0 mg, 0.140 mmol, 1.00 equiv) in N,N-dimethylformamide (5 mL) were added 2-iodopropane (270 mg, 1.59 mmol, 9.00 equiv) and DIEA (205 mg, 1.59 mmol, 9.00 equiv). The resulting solution was stirred overnight at 80° C. in an oil bath. After cooling to ambient temperature, the mixture was diluted with 50 mL of ethyl acetate, washed with 3×20 mL of brine, dried (Na2SO4), and concentrated. The residue was purified using silica gel column chromatography with ethyl acetate/petroleum ether (1:10) as eluent. The product (50 mg) was further purified by Prep-HPLC with the following conditions (1#-Pre-HPLC-001(SHIMADZU)): Column, Xbridge Prep C18, 5 um, 19*150 mm; mobile phase, water with 0.03% NH3H2O and CH3CN (38.0% CH3CN up to 51.0% in 8 min, up to 100.0% in 2 min, down to 38.0% in 1 min); Detector, Waters 2489 254&220 nm. The fractions containing pure compound were combined and lyophilized to yield 15.0 mg (21%) of the title compound as a white solid. m/z (ES+) 496 (M+H)+. 1H NMR (400 MHz, CD3OD) δ 7.69 (d, J=8.0 Hz, 2H), 7.49 (m, 2H), 7.33-7.23 (m, 2H), 4.86 (m, 1H), 3.65 (m, 1H), 3.30 (m, 1H), 3.15 (m, 1H), 2.99 (m, 6H), 2.80 (m, 4H), 2.45 (s, 3H), 2.40 and 2.29 (2 singlets, amide rotamers, 3H), 2.10 (m, 1H), 1.70 (m, 3H), 1.15 (d, J=6.8 Hz, 6H).

Provenance & Evidence