(R)-1-(7-azido-1,2,7,8,9,10-hexahydrobenzo[f]isoquinolin-3(4H)-yl)-2,2,2-trifluoroethanone → (R)-4-(3,4-dichlorophenylsulfonyl)-3-((1-((R)-3-(2,2,2-trifluoroacetyl)-1,2,3,4,7,8,9,10-octahydrobenzo[f]isoquinolin-7-yl)-1H-1,2,3-triazol-4-yl)methyl)-3,4-dihydropyrazin-2(1H)-one

Participants

Reaction Steps

To a solution of (R)-4-(3,4-dichlorophenylsulfonyl)-3-(prop-2-ynyl)-3,4-dihydropyrazin-2(1H)-one (345 mg, 1 mmol) and (R)-1-(7-azido-1,2,7,8,9,10-hexahydrobenzo[f]isoquinolin-3(4H)-yl)-2,2,2-trifluoroethanone (324 mg, 1 mmol) in dioxane (3 mL) and t-BuOH (4 mL) was added a solution of copper(2+) sulfate, pentahydrate (249 mg, 1 mmol) in water (0.5 mL), followed by a solution of (+)-sodium 1-ascorbate (198 mg, 1 mmol) in water (0.5 mL). The resulting solution was stirred at room temperature for 16 h. The reaction was diluted with EtOAc, washed with brine, dried over Na2SO4, and evaporated to dryness. Flash chromatography (SiO2, EtOAc/hexane=2:1 to pure EtOAc) afforded the title compound as a white solid.

Provenance & Evidence