HCID 66803709, compound → HCID 25222055, compound

Participants

Reaction Steps

A 4 N hydrochloric acid-ethyl acetate solution (200 mL) was added to tert-butyl[(1R,5S,6S)-6-(aminomethyl)bicyclo[3.2.0]hept-3-en-6-yl]acetate (17.53 g, 7.4 mmol), and the mixture was stirred at room temperature for 1.5 hours. Then, the solvent was distilled off under reduced pressure. The residue was suspended in dichloromethane. To the suspension, triethylamine was added dropwise, and the resulting powder was collected by filtration, then washed with dichloromethane, and then dried to obtain a white powder A (6.85 g). From the filtrate, the solvent was distilled off under reduced pressure. To the residue, a 4 N hydrochloric acid-ethyl acetate solution (200 mL) was then added again, and the mixture was stirred at room temperature for 2 hours. The solvent was distilled off under reduced pressure, and the residue was suspended in dichloromethane. To the residue, triethylamine was added dropwise, and the resulting powder was collected by filtration, then washed with dichloromethane, and then dried to obtain a white powder B (2.48 g). This white powder B was combined with the above-obtained white powder A and washed with ethanol and ethyl acetate to obtain the compound of interest as a white powder (7.39 g, 55%).

Provenance & Evidence