Lithium Hexamethyldisilazide → 8-Chloro-3-(cyclopropylsulfonyl)-1-(2-fluoro-4-iodophenyl)-5-methyl-3,4a,5,7a-tetrahydrodiimidazo[4,5-b:4',5'-e]pyridin-2(1H)-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 8-chloro-1-(2-fluoro-4-iodophenyl)-5-methyl-3,5-dihydrodiimidazo[4,5-b:4′,5′-e]pyridin-2(1H)-one (200 mg, 0.36 mmol) in THF (6 ml) at −78° C. is added LiHMDS (0.54 ml, 1 M in THF, 0.54 mmol). The reaction mixture is stirred at −78° C. for 10 min and cyclopropylsulfonyl chloride (100 mg, 0.72 mmol) is added to the mixture. The reaction is slowly warmed to room temperature and stirred at the temperature for 3 h. The reaction is quenched with saturated aqueous NH4Cl solution (10 ml) and extracted with EtOAc (2×10 ml). The combined organic solution is washed with brine (10 ml), dried over MgSO4 and concentrated. Silica gel chromatography yields the title compound.

Provenance & Evidence