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

関与物質

反応条件

反応手順

A mixture of ethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-iodopyrazolo[1,5-a]pyrimidin-5-yl)-1-(hydroxymethyl)cyclohexanecarboxylate (270 mg, 0.383 mmol), 1-phenyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (135 mg, 0.498 mmol), PdCl2(dppf)CH2Cl2 (31.3 mg, 0.038 mmol), and K3PO4 (244 mg, 1.15 mmol) in dioxane/H2O (3/0.3 mL) was degassed and then heated at 90° C. for 16 h. After cooling, 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=0.55 in 50% EtOAc) to afford ethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(hydroxymethyl)cyclohexanecarboxylate as a pale yellow solid (200 mg). HPLC-MS TR=3.06 min (UV 254 nm, 5 min method); mass calculated for formula C37H56N6O5Si2 720.4, observed LCMS m/z 721.3 (M+H).

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