Sodium Carbonate → Ethyl 3-pyridin-4-yl-1-trityl-1H-indazole-5-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a 5 ml microwave vial equipped with a stir bar was added ethyl 3-bromo-1-trityl-1H-indazole-5-carboxylate (1095.3 mg, 2.142 mmol), pyridine-4-boronic acid pinacol ester (679 mg, 3.21 mmol), sodium carbonate (2142 μl, 4.28 mmol), dioxane (1.07E+04 μl), and PalladiumTetrakis (247 mg, 0.214 mmol). The vial was purged with nitrogen, and was then sealed and heated to 80° C. for 24 h. LCMS taken after 24 hours indicates formation of the desired product. The crude reaction mixture was filtered through a column pre-packed with celite. The combined organics were concentrated under reduced pressure and the material was dry loaded onto a 100 g column. A column was run from 100% hexanes to 100% ethyl acetate. The desired product eluted; fractions were collected and concentrated in vacuo

Provenance & Evidence