Lithium hydroxide, monohydrate → (R)-3-bromo-N-(2,4-dimethoxybenzyl)-1-(4,5,6,7-tetrahydro-1H-indazol-4-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

Participants

Reaction Conditions

Reaction Steps

To a solution of (R)-3-bromo-N-(2,4-dimethoxybenzyl)-1-(1-tosyl-4,5,6,7-tetrahydro-1H-indazol-4-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (400 mg, 0.626 mmol) in THF (6.3 mL) was added 1N LiOH.H2O (105 mg, 2.504 mmol), then the mixture was stirred for 8 h at 60° C. Removed the solvent under reduced pressure and extracted with DCM and the combined organic layer was washed with water, brine and dried over anhydrous Na2SO4. The organic layer was concentrated in vacuo and the residue (R)-3-bromo-N-(2,4-dimethoxybenzyl)-1-(4,5,6,7-tetrahydro-1H-indazol-4-yl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (280 mg, yield 92.3%) was used directly to next step.

Provenance & Evidence