Benzenesulfonyl chloride → 4-Chloro-7-(phenylsulfonyl)-7H-pyrrolo[2,3-D]pyrimidine

Participants

Reaction Steps

To a solution of 4-chloro-7H-pyrrolo[2,3-d]pyrimidine (10 g, 65.12 mmol, 1.0 eq) in THF (300 mL), NaH (5.30 g, 130.24 mmol, 2 eq) was added at 0° C. After 3 h, benzenesulfonyl chloride (22.53 g, 130.24 mmol, 2 eq) was added. The temperature was warmed to RT and continued for 1 h. The reaction mixture was poured into sat. NH4Cl and extracted with EtOAc. The organic layers were dried, concentrated and purified by column chromatography (eluting with 10% EtOAc in PE) to afford 4-chloro-7-(phenylsulfonyl)-7H-pyrrolo[2,3-d]pyrimidine as brown solid (4.5 g, 24% in yield)

Provenance & Evidence