Sodium Carbonate → 9-(3-(5-(1-phenyl-1H-benzo[d]imidazol-2-yl)pyridin-3-yl)phenyl)-9H-carbazole

Participants

Reaction Conditions

Reaction Steps

A mixture of compound 1C (3.0 g, 8.15 mmol), compound 1F (2.85 g, 8.15 mmol), tetrakistriphenylphosphine palladium (471 mg, 0.408 mmol), and sodium carbonate (3.09 g, 29.2 mmol) in tetrahydrofuran (THF)/water (50 mL/30 mL) was degassed for about 45 minutes. The mixture then heated to reflux (about 80° C.) overnight under argon. After cooling to RT, the reaction mixture was poured into DCM (300 mL) then washed with saturated sodium bicarbonate (200 mL), water (200 mL), and brine (200 mL). The organic phase was then collected, dried over magnesium sulfate, and loaded onto silica gel. A flash column (gradient of 25% to 40% ethyl acetate in DCM) and precipitation from ethyl acetate/methanol gave 2.34 g of HTH-1; 56% yield, pure by HNMR.

Provenance & Evidence