Sodium hydride → HCID 178429092, compound

Participants

Reaction Conditions

Reaction Steps

4-[6-(2,4-Difluoro-phenoxy)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrazolo[3,4-d]pyrimidin-3-yl]-3-methyl-phenol ( 0.125 g, 0.26 mmol) from Example 12 was placed in a microwave tube together with dry DMF (3.0 mL) and sodium hydride ( 0.021 g of 60% suspension in mineral oil, 0.31 mmol). 2,2-Dimethyl-1,3-dioxolan-4-ylmethyl p-toluene sulfonate (0.91 g, 0.31 mmol) was added, and the tube was sealed and heated to 85° C. for five minutes via microwave. The reaction mixture was cooled and partitioned between water and ethyl acetate. The organic phase was separated, and the aqueous phase was washed twice with ethyl acetate. The combined organic layers were dried over MgSO4, filtered, and evaporated under reduced pressure. The resulting residue was dissolved in 3 mL of 4 N HCl in dioxane, transferred to a sealed tube, and heated to 90° C. for 90 minutes. The reaction mixture was cooled, partitioned between water and ethyl acetate, and made basic by addition of aqueous sodium bicarbonate (to pH 9). The organic phase was separated, and the aqueous phase was extracted three times with ethyl acetate. The combined organic layers were washed with saturated brine, dried over MgSO4, filtered, and evaporated under reduced pressure. The residue was purified by preparative TLC plate using methylene chloride/MeOH 93:7 to yield 0.016 g (0.04 mmol, 14.5%) of 3-{4-[6-(2,4-difluoro-phenoxy)-1H-pyrazolo[3,4-d]pyrimidin-3-yl]-3-methyl-phenoxy}-propane-1,2-diol. Mass Spec. M+H=429.

Provenance & Evidence