Water → 8-(1-(1-((Tert-butyldimethylsilyl)oxy)-4-methyl-1,3-dihydroisobenzofuran-5-yl)-1-hydroxy-2-methylpropan-2-yl)-2-(4-methyl-5-oxo-2,5-dihydrofuran-3-yl)-2,8-diazaspiro[4.5]decan-1-one

Participants

Reaction Conditions

Reaction Steps

To a mixture of 8-(1-(1-((tert-butyldimethylsilyl)oxy)-4-methyl-1,3-dihydroisobenzofuran-5-yl)-1-hydroxy-2-methylpropan-2-yl)-2,8-diazaspiro[4.5]decan-1-one (1.35 g, 2.76 mmol), 4-methyl-5-oxo-2,5-dihydrofuran-3-yl trifluoromethanesulfonate (I-9) (0.884 g, 3.59 mmol) in toluene (40 mL) was added potassium carbonate (0.764 g, 5.52 mmol), Xantphos (0.320 g, 0.552 mmol), and water (0.149 mL, 8.29 mmol). The mixture was flushed with nitrogen for 20 min before addition of palladium (II) acetate (0.062 g, 0.276 mmol). The resulting mixture was heated at 70° C. overnight. After filtration the filtrate was concentrated and the residue was purified on silica gel column using methanol/methylene chloride as eluting solvents to give the title compound. LC/MS: (M+1−114)+: 471.22.

Provenance & Evidence