Sodium Carbonate → (S)-4-(2-chlorophenyl)-3-(3-(3-fluoro-4-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-1,2,4-triazol-3-yl)phenyl)pyrazolo[1,5-a]pyrimidin-5-yl)oxazolidin-2-one

Participants

Reaction Conditions

Reaction Steps

To (S)-3-(3-bromopyrazolo[1,5-a]pyrimidin-5-yl)-4-(2-chlorophenyl) oxazolidin-2-one (50 mg, 0.13 mmol) were added Pd2 dba3 (5.8 mg, 0.0064 mmol), (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (7.3 mg, 0.013 mmol), 3-(2-fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-1,2,4-triazole (69 mg, 0.17 mmol), dioxane (1.2 mL) and 2M Na2CO3 (0.2 mL). The reaction was stirred for 2 hours at 80° C. in a sealed tube. After cooling, EtOAc and water were added. The organic phase was washed with brine and dried over MgSO4. The residue was purified by reverse phase chromatography (SP4, 12M, water/CH3CN 90:10 to 0:100, 20 column volumes) to yield (S)-4-(2-chlorophenyl)-3-(3-(3-fluoro-4-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-1,2,4-triazol-3-yl)phenyl)pyrazolo[1,5-a]pyrimidin-5-yl)oxazolidin-2-one (24 mg, 31% yield) as a pale yellow solid.

Provenance & Evidence