Cesium carbonate → HCID 117842857, compound

Participants

Reaction Conditions

Reaction Steps

(R)-1-((R)-1-(4-methoxyphenyl)ethyl)-4-((R)-1-((6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazolo[1,5-a]pyridin-4-yl)oxy)ethyl)pyrrolidin-2-one 6.19 (55.0 mg, 0.109 mmol), tert-butyl 4-(6-bromopyridin-3-yl)piperazine-1-carboxylate 7.13 (65.2 mg, 0.190 mmol) and Cs2CO3 (106 mg, 0.326 mmol) were dissolved in 1,2-dimethoxyethane (3.0 mL) and water (1.5 mL). The mixture was degassed for 5 minutes. PEPPSI-IPr catalyst (7.42 mg, 0.0109 mmol) was added and the mixture was heated for 1 h at 90° C. The reaction was cooled and diluted with EtOAc and water. The layers were separated and the organic layer was dried (MgSO4), filtered and concentrated under reduced pressure. The residue was purified by flash chromatography (50 to 100% EtOAc in hexanes) to provide tert-butyl 4-(6-(4-((R)-1-((R)-1-((R)-1-(4-methoxyphenyl)ethyl)-5-oxopyrrolidin-3-yl)ethoxy)pyrazolo[1,5-a]pyridin-6-yl)pyridin-3-yl)piperazine-1-carboxylate 6.20.

Provenance & Evidence