Imidazole → 4-(1-acetyl-1,2,3,6-tetrahydropyridin-4-yl)-3-(1-(4-amino-3-(3-((tert-butyldimethylsilyl)oxy)-5-fluorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-1H-isochromen-1-one

Participants

Reaction Steps

4-(1-acetyl-1,2,3,6-tetrahydropyridin-4-yl)-3-(1-(4-amino-3-(3-fluoro-5-hydroxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-1H-isochromen-1-one (Example 72, 726 mg, 1.343 mmol) was dissolved in N,N-Dimethylformamide (7.5 ml), followed by the addition of TBDMSCl (405 mg, 2.69 mmol) and imidazole (366 mg, 5.37 mmol). The mixture stirred for 3 hrs at rt, then further 0.3 eq of TBDMSCl and imidazole were added to achieve full reaction completion The reaction was diluted with DCM (100 ml) and washed twice with 0.5M HClaqueous (50 ml), filtered through a phase separator, and concentrated under reduced pressure. The residue was purified via flash chromatography on silica gel using a Biotage 100G SNAP with a gradient of DCM and EtOH to give the title compound (635 mg, 72.2%) as pinky foam.

Provenance & Evidence