Sulfuric acid magnesium salt (1:1) → HCID 66800094, compound

Participants

Reaction Steps

A toluene (10 ml) suspension of (4aR,8aS)-2,2-dimethyldecahydroquinoxaline (168 mg, 0.998 mmol), 4-bromo-2-ch1oro-1-fluorobenzene (251 mg, 1.20 mmol), Pd(OAc)2 (11.2 mg, 0.0500 mmol), t-Bu3P.HBF4 (14.5 mg, 0.0500 mmol), and NaOt-Bu (135 mg, 1.40 mmol) was stirred for 5 hours under reflux in a nitrogen atmosphere. The reaction solution was cooled to room temperature. Then, water (0.5 mL) and AcOEt (10 mL) were added thereto, and the mixture was stirred. MgSO4 was further added thereto, and the mixture was stirred. Then, insoluble matter was filtered. The filtrate was concentrated under reduced pressure, and the obtained residue was purified by basic silica gel column chromatography (Hex-AcOEt). The obtained oil was dissolved in 1 N HCl-EtOH (3 mL), and ethanol was distilled off under reduced pressure. The deposited crystal was recrystallized from ethanol/acetone to obtain (4aS,8aR)-1-(3-chloro-4-fluorophenyl)-3,3-dimethyldecahydroquinoxaline hydrochloride (153 mg, yield: 46%) in a white powder form.

Provenance & Evidence