Potassium Phosphate, Tribasic → 1-(phenylsulfonyl)-6-(1H-pyrrolo[2,3-b]pyridin-4-yl)-1H-indazol-4-amine

Participants

Reaction Conditions

Reaction Steps

1-(Phenylsulfonyl)-6-(4,4,6,6-tetramethyl-1,3,2-dioxaborinan-2-yl)-1H-indazol-4-amine (2 g, 4.84 mmol), 4-bromo-1H-pyrrolo[2,3-b]pyridine (0.953 g, 4.84 mmol), Pd(dppf)Cl2 (0.708 g, 0.968 mmol) and Tripotassium phosphate (3.08 g, 14.52 mmol) were divided between 2× microwave vials and dissolved in 1,4-dioxane (24 ml) and water (8.00 ml); 12 ml dioxane and 4 ml water in each vial. The mixtures were heated in the microwave at 80° C. for 20 min. Solvent was removed in vacuo and the residue was partitioned between DCM (100 ml) and water (100 ml). The organic layer was collected using a hydrophobic frit and the solvent removed in vacuo. DCM was added to dissolve the crude residue but a suspension resulted. The yellow solid was filtered off and dried in a vacuum oven for 30 mins to afford the title compound (919 mg). The filtrate was concentrated in vacuo and dissolved in DCM, then applied to the top of a 50 g silica SPE cartridge. This was eluted with 0-100% EtOAc/DCM over 60 mins on the FlashMaster II. The product-containing fractions were combined to give a further portion of the title compound as a yellow solid (220 mg).

Provenance & Evidence