Cesium carbonate → Tert-Butyl 4-(6-(5-Bromo-1-methyl-2-oxo-1,2-dihydropyridin-3-ylamino)pyridin-3-yl)-3-oxopiperazine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A reaction vessel was charged with 332c (946 mg, 3.2 mmol) in 40 mL of anhydrous 1,4-dioxane, 3,5-dibromo-1-methylpyridin-2(1H)-one (1.11 g, 4.2 mmol), tris(dibenzylideneacetone)dipalladium(0) (146 mg, 0.16 mmol), Xantphos (185 mg, 0.32 mmol), and Cs2CO3 (2.6 g, 8.0 mmol). After three cycles of vacuum/Argon flash, it was stirred at 110° C. for 4 h. The reaction mixture was filtered and the filtrate was evaporated in vacuum. The crude was purified by silica-gel column chromatography eluting with 50:1 methylene chloride/methanol to afford 332d as a yellow solid (706 mg, 46%). MS: [M+H]+ 479.

Provenance & Evidence