Stannanecarbonitrile, tributyl- → Methyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-cyano-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)benzoate

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Reaction Conditions

Reaction Steps

Under Ar, compound, methyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(6-phenylpyridin-3-yl)pyrazolo[1,5-a]pyrimidin-5-yl)benzoate (80 mg, 0.1 mmol) was mixed with Pd(PPh3)4 (12 mg, 0.01 mmol, Pd(t-Bu3P)3 (5 mg, 0.01 mmol), cyanotributylstannane (85 uL, 0.3 mmol) and dioxane (3 mL) in sealed tube. The resulting mixture was heated at 160° C. and stirred 2 hrs. After cooled to room temperature, the mixture was filtered through 10% KF on silica gel and washed with EtOAc. After concentration, the crude was used in the next step directly without further purification. HPLC-MS tR=3.18 min (UV254 nm); mass calculated for formula C38H46N6O4Si2 706.3, observed LCMS m/z 707.2 (M+H).

Provenance & Evidence