Water → 1-(1-Methylethyl)-N-[6-(2-oxo-2,3-dihydro-1,3-benzoxazol-7-yl)-1H-indazol-4-yl]-1H-pyrazole-5-carboxamide

Participants

Reaction Conditions

Reaction Steps

A microwave vial was charged with Solvias catalyst (8 mg), tripotassium phosphate (90 mg) and 7-bromo-1,3-benzoxazol-2(3H)-one (from prep. such as US2006/0122189A1, 33 mg). 1-(1-Methylethyl)-N-[2-(tetrahydro-2H-pyran-2-yl)-6-(4,4,6,6-tetramethyl-1,3,2-dioxaborinan-2-yl)-2H-indazol-4-yl]-1H-pyrazole-5-carboxamide (70 mg) in 1,4-dioxane (0.5 ml) was added followed by water (0.1 ml). The reaction was heated under microwave irradiation at 120° C. for 10 min. The reaction was passed through a silica cartridge preconditioned with methanol, washing with methanol, then dried under a stream of nitrogen. The residue was subjected to a DCM/water wash and then dried under a stream of nitrogen. The residue was dissolved in DMSO:methanol (1 ml, 1:1, v/v) and purified by MDAP (method A). Appropriate fractions were evaporated under a stream of nitrogen. The residues were dissolved in a minimum amount of methanol and combined. A few drops of 2M HCl (aq) were added and the reaction was left to stand at room temperature. The reaction was then evaporated under a stream of nitrogen, passed through an aminopropyl cartridge and dried to give title compound, 10 mg.

Provenance & Evidence