Sodium Carbonate → 7-(7H-Pyrrolo[2,3-d]pyrimidin-4-yl)-4,7-diaza-spiro[2.5]octane-4-sulfonic acid (4-cyano-benzyl)-methyl-amide

Participants

Reaction Steps

4-(4-Methylsulfamoyl-4,7-diaza-spiro[2.5]oct-7-yl)-pyrrolo[2,3-d]pyrimidine-7-carboxylic acid tert-butyl ester (intermediate 4) (0.237 mmol) was dissolved in dry DMF (2 mL) and added Cs2CO3 (0.35 mmol) and 4-bromomethyl-benzonitrile (0.35 mmol). Stirred at rt for 16 h and then added H2O (10 mL). Extracted with EtOAc (3×10 mL) and the combined organic phases were concentrated in vacuo. Purified by flash chromatography on silica using a gradient of heptane to EtOAc as eluent. The obtained compound was treated with TFA (2 mL) at rt for 2 h. The crude reaction mixture was added sat. Na2CO3 to pH=7 and the extracted with EtOAc (3×10 mL). the combined organic phases was washes with brine (10 mL), dried (Na2SO4), filtered and concentrated in vacuo. The pure compound was obtained by trituation using CH2Cl2.

Provenance & Evidence