4-Methoxybenzenesulfonyl chloride → 5-Bromo-1-(4-methoxybenzenesulfonyl)-7-nitroindoline

Participants

Reaction Steps

A solution of 5-bromo-7-nitroindoline (5 g, 0.021 mol), 4-methoxyphenylsulfonyl chloride (6.36 g, 0.030 mol) in pyridine (10 ml) was stirred at 120° C. for 16 h. The reaction was quenched with water and extracted with CH2Cl2. The combined organic layer was dried over anhydrous MgSO4 and evaporated to give a residue that was chromatographed over silica gel (EtOAc:n-hexane=1:2) to afford compound 17, yield 85%.

Provenance & Evidence