Sodium methanolate methanol → (S)-tetrahydrofuran-3-yl 3-(2-(5-chloro-1H-pyrrolo[2,3-b]pyridin-3-yl)-5-fluoropyrimidin-4-ylamino)azetidine-1-carboxylate

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(S)-tetrahydrofuran-3-yl 3-(2-(5-chloro-1-tosyl-1H-pyrrolo[2,3-b]pyridin-3-yl)-5-fluoropyrimidin-4-ylamino)azetidine-1-carboxylate, 6d, was dissolved in methanol (2 mL) and then treated with of 25% sodium methoxide/methanol (0.5 mL) and heated at 60° C. in sealed tube. LCMS showed complete reaction after 10 minutes. The resulting solution was quenched with aqueous saturated NH4Cl solution (0.5 mL) then evaporated to dryness and the residue dissolved in DMSO and purified by reverse phase HPLC (ammonium formate buffer) to afford 25.9 mg (55% yield) of the desired product, 422, as a solid.

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