4-Toluenesulfonyl chloride → 2-(2-{4-amino-2-(2-methoxyethyl)-1-[3-(2-oxopyrrolidin-1-yl)propyl]-1H-imidazo[4,5-c]quinolin-8-yl}ethyl)-1H-isoindole-1,3(2H)dione

Participants

Reaction Steps

2-(2-{2-(2-Methoxyethyl)-1-[3-(2-oxo-pyrrolidin-1-yl)propyl]-1H-imidazo[4,5-c]quinolin-8-yl}ethyl)-1H-isoindole-1,3(2H)-dione (2.1 g, 3.8 mmol) in dichloromethane (75 mL) was combined with 3-chloroperoxybenzoic acid (60% pure, 2.0 g, 7.5 mmol) and the reaction was stirred for 18 hours. Concentrated ammonium hydroxide (40 mL) was added and the mixture was vigorously stirred for an additional 10 minutes. p-Toluenesulfonyl chloride (791 mg, 4.12 mmol) was added and the mixture was stirred for an additional 1 hour. The fractions were separated and aqueous fraction was extracted with chloroform (10×35 mL). The combined organic fractions were sequentially dried (MgSO4), filtered, and concentrated to provide 2.2 g of 2-(2-{4-amino-2-(2-methoxyethyl)-1-[3-(2-oxopyrrolidin-1-yl)propyl]-1H-imidazo[4,5-c]quinolin-8-yl}ethyl)-1H-isoindole-1,3(2H)dione as an off-white foam. MS (APCI) m/z 541 (M+H)+.

Provenance & Evidence