Potassium Phosphate, Tribasic → 2-methoxyethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(2-methoxyethoxy)cyclohexanecarboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-methoxyethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-iodopyrazolo[1,5-a]pyrimidin-5-yl)-1-(2-methoxyethoxy)cyclohexanecarboxylate (3.06 g, 3.93 mmol), 1-phenyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (1.38 g, 5.11 mmol), PdCl2(dppf)CH2Cl2 (321 mg, 0.393 mmol), and K3PO4 (2.50 g, 11.8 mmol) in dioxane/H2O (40/4 mL) was degassed and then heated at 90° C. for 16 h. The reaction mixture was diluted with EtOAc and washed with H2O and brine, dried over Na2SO4, and concentrated. The crude product was purified by a SiO2 column (0-40% EtOAc/Hexanes, Rf=0.6 in 50% EtOAc/Hexanes) to afford 2-methoxyethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(2-methoxyethoxy)cyclohexanecarboxylate as a brown oil (2.28 g). HPLC-MS TR=3.25 min (UV 254 nm, 5 min method); mass calculated for formula C40H62N6O7Si2 794.4, observed LCMS m/z 795.3 (M+H).

Provenance & Evidence