反应详情

温度

90 °C

A mixture of 5-chloro-N,N-bis((2-(trimethylsilyl)ethoxy)methyl)pyrazolo[1,5-a]pyrimidin-7-amine (2.99 g, 6.97 mmol), ethyl 1-(benzyloxymethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)cyclohex-3-enecarboxylate (8.36 mmol), PdCl2(dppf)CH2Cl2 (683 mg, 0.836 mmol), and K3PO4 (5.32 g, 25.1 mmol) in dioxane/H2O (40/2 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 (0-20% EtOAc/Hexanes, Rf=0.45 in 20% EtOAc) to afford ethyl 1-(benzyloxymethyl)-4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)pyrazolo[1,5-a]pyrimidin-5-yl)cyclohex-3-enecarboxylate as a pale yellow oil (3.06 g). HPLC-MS TR=3.17 min (UV 254 nm, 5 min method); mass calculated for formula C35H54N4O5Si2 666.4, observed LCMS m/z 667.3 (M+H).

1. customwas degassed
2. temperatureAfter cooling
3. additionthe reaction mixture was diluted with EtOAc
4. washwashed with H2O and brine
5. dry with materialdried over Na2SO4
6. concentrationconcentrated
7. customThe crude product was purified by a SiO2 column (0-20% EtOAc/Hexanes, Rf=0.45 in 20% EtOAc)