Thionyl Chloride → 5-chloromethyl-2-[2-cyclopentyl-1-(4-methanesulfonyl-phenyl)-ethyl]-1H-pyrrolo[2,3-b]pyridine

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Reaction Steps

To a stirred solution of {2-[2-cyclopentyl-1-(4-methanesulfonyl-phenyl)-ethyl]-1H-pyrrolo[2,3-b]pyridin-5-yl}-methanol (prepared as in Example 8, 800 mg, 1.92 mmol) in dichloromethane (20 mL) at 0° C. was added a solution of thionyl chloride (0.36 mL, 4.89 mmol) in dichloromethane (2 mL) and the mixture was stirred for 2 h. The resulting mixture was concentrated in vacuo and the residue was extracted with ethyl acetate, washed with a saturated aqueous sodium bicarbonate solution (2×50 mL), brine, dried over anhydrous sodium sulfate and then concentrated in vacuo to afford 5-chloromethyl-2-[2-cyclopentyl-1-(4-methanesulfonyl-phenyl)-ethyl]-1H-pyrrolo[2,3-b]pyridine (798 mg, quant.) as a light yellow solid which was used in the next step without further purification: LC/MS m/e calcd for C22H25ClN2O2S [M+H]+ 417.97, observed 417.0.

Provenance & Evidence