Triphenylphosphine → HCID 90303937, compound

Participants

Reaction Steps

A solution of 1-tosyl-4,5,6,7-tetrahydro-1H-indazol-4-ol (4.05 g, 11.13 mmol), 3-bromo-N-(2,4-dimethoxybenzyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine (3.9 g, 13.35 mmol) and PPh3 (4.38 g, 16.70 mmol) in dry THF (110 mL) at 0° C. was added dropwise DIAD (3.37 g, 16.70 mmol) over a period of 5 minutes under a nitrogen atmosphere, then the mixture was stirred at room temperature for 4 hours. Removed the solvent under reduced pressure and then extracted with DCM, the combined organic layer was washed with water, brine and dried over anhydrous Na2SO4. The organic layer was concentrated in vacuo and the residue was purified by preparative HPLC separation to afford 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 (2.3 g, yield 32.4%). MS-ESI (m/z): 640 (M+2)+ (Acq Method: 10-80AB_2 min; Rt: 1.357 min)

Provenance & Evidence