Hydrochloric Acid → HCID 54671153, compound

Participants

Reaction Steps

To a solution of tert-butyl 5-oxo-1,2,4a,5,6,7-hexahydropyrazino[1,2-a][1,4]benzodiazepine-3(4H)-carboxylate (100 mg, 0.315 mmol, Example 1) in anhydrous N,N-dimethylformamide (2 mL) was added sodium hydride (13.86 mg, 0.347 mmol). After stirring for 1 hour at room temperature, (bromomethyl)cyclopropane (102 mg, 0.756 mmol) was added to the reaction mixture. The reaction was stirred for 20 hours. The reaction was then quenched carefully with water and extracted with ethyl acetate. The organic layer was separated, dried with MgSO4, and concentrated. The residue was purified via flash chromatography (0-40% ethyl acetate/hexanes). The material obtained was dissolved in 1,4-dioxane (0.8 mL) and 4 M HCl in 1,4-dioxane (0.8 mL). The mixture was stirred for 20 hours. at room temperature. The title compound was collected by filtration as the hydrochloric acid salt. 1H NMR (500 MHz, DMSO-d6) δ 9.44 (s, 1H), 8.19 (s, 1H), 7.07-6.94 (m, 1H), 6.89 (d, J=7.9 Hz, 1H), 6.70 (t, J=7.2 Hz, 1H), 4.73 (d, J=16.0 Hz, 1H), 4.43 (s, 1H), 4.17 (d, J=16.1 Hz, 1H), 3.51-2.79 (m, 8H), 0.66 (m, 1H), 0.15-0.05 (m, 1H), 0.05-−0.08 (m, J=4.1 Hz, 1H); MS (DCI) m/z 221.1 (M+H)+.

Provenance & Evidence