Triethylamine → benzyl (NE)-N-[[1-[1-(4-fluorophenyl)cyclobutyl]-7-[2-(propylsulfonylamino)ethoxy]-3,4-dihydro-1H-isoquinolin-2-yl]-(phenylmethoxycarbonylamino)methylidene]carbamate

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Reaction Steps

N-[2-({1-[1-(4-Fluorophenyl)cyclobutyl]-1,2,3,4-tetrahydroisoquinolin-7-yl}oxy)ethyl]propane-1-sulfonamide (100 mg, 0.224 mmol, cf. example 65) and dibenzyl [(methylsulfanyl)methylylidene]biscarbamate (104 mg, 0.291 mmol) were dissolved in dry dimethylformamide (1 mL). Triethylamine (0.094 mL, 0.672 mmol) was added followed by silver trifluoromethanesulfonate (81 mg, 0.313 mmol). A yellow precipitate was formed and the reaction mixture turned dark brown. Stirring was continued at room temperature for 3 h. The solvent was evaporated in vacuo. Dichloromethane (15 mL) was added, the solid was removed by filtration and washed with dichloromethane. The combined dichloromethane phases were concentrated in vacuo and the crude product was purified by flash chromatography (silica, dichloromethane then dichlorometane:methanol=100:1). Yield: 100 mg (0.132 mmol, 59%).

Provenance & Evidence