Potassium Carbonate → HCID 23092644, compound

Participants

Reaction Steps

Analogously to general procedure (I) N-(3,3-dimethyl-6-nitro-2-oxo-2,3-dihydro-1H-indol-5-yl)-acetamide (1 g) is alkylated using 3-(3-bromo-propyl)-pyridine (3.04 g; 15.2 mmol) and K2CO3 (2.1 g; 15.2 mmol) at RT for 4 days. After aqueous work-up and flash chromatography on silica gel eluting with CH2Cl2/MeOH (30:1), the pure alkylated acetamide (425 mg; 1.11 mmol) is de-acetylated under reflux conditions in 2-propanol (1.2 ml) and hydrochloric acid (6 N; 3.7 ml). 5-Amino-3,3-dimethyl-6-nitro-1-(3-pyridin-3-yl-propyl)-1,3-dihydro-indol-2-one (319 mg) is obtained by aqueous work-up and used without further purification.

Provenance & Evidence