Methyl iodide → 7-(Benzenesulfonyl)-4-chloro-6-methyl-7H-pyrrolo[2,3-d]pyrimidine

Participants

Reaction Steps

To the solution of 4-chloro-7-(phenylsulfonyl)-7H-pyrrolo[2,3-d]pyrimidine (3 g, 12.6 mmol, 1.0 eq) and TMEDA (3.0 mL, 18.9 mmol, 1.5 eq) in THF (120 mL), n-BuLi (7.5 mL, 18.9 mmol, 1.5 eq) was added at −78° C. After 3 min, CH3I (3.7 mL, 59.2 mmol, 4.7 eq) was added. After 3 h, the reaction mixture was warmed to RT over 1 h. The reaction was quenched by addition of sat NH4Cl (10 mL) at −78° C. EtOAc (200 mL) and water (100 mL) was added. The organic layer was separated, dried and concentrated to afford 4-chloro-6-methyl-7-(phenylsulfonyl)-7H-pyrrolo[2,3-d]pyrimidine as a brown solid (6.7 g, 90% in yield).

Provenance & Evidence