Potassium Carbonate → 5-[6-(Dimethylamino)-3-pyridinyl]-3-(1,1-dioxidotetrahydro-2H-thiopyran-4-yl)-1H-indole-7-carboxamide

Participants

Reaction Conditions

Reaction Steps

[6-(Dimethylamino)-3-pyridinyl]boronic acid (34 mg, 0.202 mmol), 5-bromo-3-(1,1-dioxidotetrahydro-2H-thiopyran-4-yl)-1H-indole-7-carboxamide (75 mg, 0.202 mmol) and potassium carbonate (84 mg, 0.606 mmol) were suspended in 4 mL of dioxane:water (3:1) and degassed for a few minutes with nitrogen gas. Pd(PPh3)4 (23 mg) was then added and the reaction mixture was heated in a microwave oven at 150° C. for 40 minutes on ‘high’ absorption setting. After heating, LCMS of all crude reaction mixtures showed the desired m/z with few impurities. The crude reaction mixtures were filtered through 500 mg Stratospheres SPE Thiol cartridges eluting with 10 mL methanol/DCM (1:1) and concentrated. The residues were dissolved in DMSO (˜3 mL) and purified via RP-HPLC using an XBridge Prep C18 column with water/acetonitrile (0.1% NH4OH buffer). The desired fractions were concentrated, giving 0.029 g (34.8%) of the title compound.

Provenance & Evidence