Ethyl Acetate → Tert-butyl 3-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)pyrazolo[1,5-a]pyrimidin-5-yl)-8-azabicyclo[3.2.1]oct-2-ene-8-carboxylate

Participants

Reaction Conditions

Reaction Steps

To 5-chloro-N,N-bis((2-(trimethylsilyl)ethoxy)methyl)pyrazolo[1,5-a]pyrimidin-7-amine (11.1 g, 25.8 mmol) in DME (200 mL) was added tert-butyl 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-8-azabicyclo[3.2.1]oct-2-ene-8-carboxylate (9.5 g, 28.4 mmol), PdCl2(dppf)2 (2.1 g, 2.6 mmol) and 2M Na2CO3 (100 ml). The reaction was heated at 100° C. for 16 hours, at which time LC/MS analysis confirmed full consumption of starting material. On cooling, H2O (80 ml) and EtOAc (200 ml) were added and the organics were extracted with EtOAc (2×250 ml), dried (Na2SO4) and concentrated in vacuo to give a crude product. Gradient column chromatography on silica eluting with 10% to 60% EtOAc/hexanes(0-50%) gave tert-butyl 3-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)pyrazolo[1,5-a]pyrimidin-5-yl)-8-azabicyclo[3.2.1]oct-2-ene-8-carboxylate.

Provenance & Evidence