Lithium Hexamethyldisilazide → N-(5-((4-methoxybenzyloxy)methyl)-3-(2-methyl-9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl)pyridin-2-yl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-4-amine

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6-(2-Fluoro-5-((4-methoxybenzyloxy)methyl)pyridin-3-yl)-2-methyl-9-(tetrahydro-2H-pyran-2-yl)-9H-purine (1.223 g, 2.634 mmol) and 1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-4-amine (0.596 g, 2.74 mmol) were dissolved in THF (23.5 mL) and the flask was cooled in an ice water bath under nitrogen. Then, LiHMDS (1.0 M in THF, 7.8 mL, 7.8 mmol) was added via syringe, and the reaction was stirred under nitrogen at 0° C. for 35 minutes. Then, the reaction was quenched with water (40 mL) and diluted with water (40 mL), and then extracted with DCM and with 10:1 DCM/MeOH. Brine was added to break up emulsions. The organic extracts were combined, concentrated, and purified on a silica gel filter (about 3 inches, 50:1 DCM/2N ammonia in MeOH to 40:1 DCM/2N ammonia in MeOH) to afford N-(5-((4-methoxybenzyloxy)methyl)-3-(2-methyl-9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl)pyridin-2-yl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-4-amine (1.343 g, 54% purity, 43% yield). MS (ESI pos. ion) m/z 661 (M+H)+.

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